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removal</title> <meta name="description" content="Search results for: pollutant removal"> <meta name="keywords" content="pollutant removal"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="pollutant removal"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 1897</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: pollutant removal</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1897</span> Removal of Gaseous Pollutant from the Flue Gas in a Submerged Self-Priming Venturi Scrubber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manisha%20Bal">Manisha Bal</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20C.%20Meikap"> B. C. Meikap</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydrogen chloride is the most common acid gas emitted by the industries. HCl gas is listed as Title III hazardous air pollutant. It causes severe threat to the human health as well as environment. So, removal of HCl from flue gases is very imperative. In the present study, submerged self-priming venturi scrubber is chosen to remove the HCl gas with water as a scrubbing liquid. Venturi scrubber is the most popular device for the removal of gaseous pollutants. Main mechanism behind the venturi scrubber is the polluted gas stream enters at converging section which accelerated to maximum velocity at throat section. A very interesting thing in case of submerged condition, venturi scrubber is submerged inside the liquid tank and liquid is entered at throat section because of suction created due to large pressure drop generated at the throat section. Maximized throat gas velocity atomizes the entered liquid into number of tiny droplets. Gaseous pollutant HCl is absorbed from gas to liquid droplets inside the venturi scrubber due to interaction between the gas and water. Experiments were conducted at different throat gas velocity, water level and inlet concentration of HCl to enhance the HCl removal efficiency. The effect of throat gas velocity, inlet concentration of HCl, and water level on removal efficiency of venturi scrubber has been evaluated. Present system yielded very high removal efficiency for the scrubbing of HCl gas which is more than 90%. It is also concluded that the removal efficiency of HCl increases with increasing throat gas velocity, inlet HCl concentration, and water level height. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=air%20pollution" title="air pollution">air pollution</a>, <a href="https://publications.waset.org/abstracts/search?q=HCl%20scrubbing" title=" HCl scrubbing"> HCl scrubbing</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20transfer" title=" mass transfer"> mass transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=self-priming%20venturi%20scrubber" title=" self-priming venturi scrubber"> self-priming venturi scrubber</a> </p> <a href="https://publications.waset.org/abstracts/91400/removal-of-gaseous-pollutant-from-the-flue-gas-in-a-submerged-self-priming-venturi-scrubber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/91400.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1896</span> Long-Term Treatment Efficiency of an Integrated Constructed Wetland System for the Removal of Pollutants Using Biomaterials/ Cork and Date Palm By-Product</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khadija%20Kraiem">Khadija Kraiem</a>, <a href="https://publications.waset.org/abstracts/search?q=Salma%20Bessadok"> Salma Bessadok</a>, <a href="https://publications.waset.org/abstracts/search?q=Dorra%20Tabassi"> Dorra Tabassi</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20Jaouani"> Atef Jaouani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study investigated the long-term impact of incorporating biowaste (i.e., cork and date stones) as a natural and cost-effective alternative to traditional substrates (e.g., gravel) in constructed wetlands (CWs). Results showed that pollutant removal efficiency was significantly improved after the addition of biowaste under different hydraulic retention time (HRT) conditions. The addition of cork in vertical flow constructed wetlands (VFCWs) improved chemical oxygen demand (COD) removal from 64% to 86%. Similarly, in horizontal flow constructed wetlands (HFCWs), COD removal increased from 67% to 81% with cork and 85% with date seeds. In terms of ammonium removal, cork in VFCWs increased efficiency from 34% to 56%, while in HFCWs, it improved from 24% to 47% with cork and reached 44% with date stones. Furthermore, our data showed that the addition of biowastes improved the removal of micropollutants, such as bisphenol A (BPA) and diclofenac (DFC), with the highest removal of BPA of 86% and DFC of 89% observed in the date seeds wetland. However, no significant changes were observed in pathogens removal. The evaluation of the impact of biowaste addition on the contribution of plant species and its interaction with hydraulic retention time (HRT) was also conducted for pollutant removal. The addition of biowaste resulted in a decrease in the required HRT for effective contaminant elimination, but it had no notable impact on the contribution of plant species. To summarize, our findings indicate that utilizing biowastes in artificial wetlands for the treatment of wastewater with various pollutants can result in synergistic effects, presenting potential benefits in terms of both efficiency and cost-effectiveness. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=constructed%20wetlands" title="constructed wetlands">constructed wetlands</a>, <a href="https://publications.waset.org/abstracts/search?q=cork" title=" cork"> cork</a>, <a href="https://publications.waset.org/abstracts/search?q=date%20stones" title=" date stones"> date stones</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20removal" title=" pollutant removal"> pollutant removal</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a> </p> <a href="https://publications.waset.org/abstracts/189165/long-term-treatment-efficiency-of-an-integrated-constructed-wetland-system-for-the-removal-of-pollutants-using-biomaterials-cork-and-date-palm-by-product" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/189165.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">23</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1895</span> Effect of Substrate Type on Pollutant Removal and Greenhouse Gases Emissions in Constructed Wetlands with Ornamental Plants</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maria%20E.%20Hernnadez">Maria E. Hernnadez</a>, <a href="https://publications.waset.org/abstracts/search?q=Elizabeth%20Ramos"> Elizabeth Ramos</a>, <a href="https://publications.waset.org/abstracts/search?q=Claudia%20Ortiz"> Claudia Ortiz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Pollutant removal (N-NH4, COD, S-SO4, N-NO3 and P-PO4) and greenhouse gases (methane and nitrous oxide) emissions were investigated in constructed wetlands CW mesocosms with four types of substrate (gravel (G) zeolite (Z), Gravel+Plastic (GP) and zeolite+plastic), all planted with the ornamental plant lily (Lilium sp). Significantly higher N-NH4 removal was found in the CW-Z (97%) and CW-ZP (85%) compared with CW-G (61%) and CW-GP (17%), also significantly lower emissions of nitrous oxide were found in CW-Z (2.2 µgm-2min-1) and CW-ZP (2.5 µgm-2min-1) compared with CW-G(7.4 µgm-2min-1 ) and CW-GP (6.30 µgm-2min-1). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=methane" title="methane">methane</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrous%20oxide" title=" nitrous oxide"> nitrous oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=lily" title=" lily"> lily</a>, <a href="https://publications.waset.org/abstracts/search?q=zeolite" title=" zeolite"> zeolite</a> </p> <a href="https://publications.waset.org/abstracts/47510/effect-of-substrate-type-on-pollutant-removal-and-greenhouse-gases-emissions-in-constructed-wetlands-with-ornamental-plants" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/47510.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">397</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1894</span> Laboratory Analysis of Stormwater Runoff Hydraulic and Pollutant Removal Performance of Pervious Concrete Based on Seashell By-Products</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jean-Jacques%20Randrianarimanana">Jean-Jacques Randrianarimanana</a>, <a href="https://publications.waset.org/abstracts/search?q=Nassim%20Sebaibi"> Nassim Sebaibi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Boutouil"> Mohamed Boutouil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In order to solve problems associated with stormwater runoff in urban areas and their effects on natural and artificial water bodies, the integration of new technical solutions to the rainwater drainage becomes even more essential. Permeable pavement systems are one of the most widely used techniques. This paper presents a laboratory analysis of stormwater runoff hydraulic and pollutant removal performance of permeable pavement system using pervious pavements based on seashell products. The laboratory prototype is a square column of 25 cm of side and consists of the surface in pervious concrete, a bedding of 3 cm in height, a geotextile and a subbase layer of 50 cm in height. A series of constant simulated rain events using semi-synthetic runoff which varied in intensity and duration were carried out. The initial vertical saturated hydraulic conductivity of the entire pervious pavement system was 0.25 cm/s (148 L/m<sup>2</sup>/min). The hydraulic functioning was influenced by both the inlet flow rate value and the test duration. The total water losses including evaporation ranged between 9% to 20% for all hydraulic experiments. The temporal and vertical variability of the pollutant removal efficiency (PRE) of the system were studied for total suspended solids (TSS). The results showed that the PRE along the vertical profile was influenced by the size of the suspended solids, and the pervious paver has the highest capacity to trap pollutant than the other porous layers of the permeable pavement system after the geotextile. The TSS removal efficiency was about 80% for the entire system. The <em>first-flush</em> effect of TSS was observed, but it appeared only at the beginning (2 to 6 min) of the experiments. It has been shown that the PPS can capture <em>first-flush</em>. The project in which this study is integrated aims to contribute to both the valorization of shellfish waste and the sustainable management of rainwater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic" title="hydraulic">hydraulic</a>, <a href="https://publications.waset.org/abstracts/search?q=pervious%20concrete" title=" pervious concrete"> pervious concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20removal%20efficiency" title=" pollutant removal efficiency"> pollutant removal efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=seashell%20by-products" title=" seashell by-products"> seashell by-products</a>, <a href="https://publications.waset.org/abstracts/search?q=stormwater%20runoff" title=" stormwater runoff"> stormwater runoff</a> </p> <a href="https://publications.waset.org/abstracts/74712/laboratory-analysis-of-stormwater-runoff-hydraulic-and-pollutant-removal-performance-of-pervious-concrete-based-on-seashell-by-products" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/74712.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">216</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1893</span> Pollutant Dispersion in Coastal Waters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonia%20Ben%20Hamza">Sonia Ben Hamza</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabra%20Habli"> Sabra Habli</a>, <a href="https://publications.waset.org/abstracts/search?q=Nejla%20Mahjoub%20Sa%C3%AFd"> Nejla Mahjoub Saïd</a>, <a href="https://publications.waset.org/abstracts/search?q=Herv%C3%A9%20Bournot"> Hervé Bournot</a>, <a href="https://publications.waset.org/abstracts/search?q=Georges%20Le%20Palec"> Georges Le Palec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper spots light on the effect of a point source pollution on streams, stemming out from intentional release caused by unconscious facts. The consequences of such contamination on ecosystems are very serious. Accordingly, effective tools are highly demanded in this respect, which enable us to come across an accurate progress of pollutant and anticipate different measures to be applied in order to limit the degradation of the environmental surrounding. In this context, we are eager to model a pollutant dispersion of a free surface flow which is ejected by an outfall sewer of an urban sewerage network in coastal water taking into account the influence of climatic parameters on the spread of pollutant. Numerical results showed that pollutant dispersion is merely due to the presence of vortices and turbulence. Hence, it was realized that the pollutant spread in seawater is strongly correlated with climatic conditions in this region. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coastal%20waters" title="coastal waters">coastal waters</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20dispersion" title=" pollutant dispersion"> pollutant dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flows" title=" turbulent flows"> turbulent flows</a> </p> <a href="https://publications.waset.org/abstracts/28431/pollutant-dispersion-in-coastal-waters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28431.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">514</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1892</span> CFD Modeling of Pollutant Dispersion in a Free Surface Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonia%20Ben%20Hamza">Sonia Ben Hamza</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabra%20Habli"> Sabra Habli</a>, <a href="https://publications.waset.org/abstracts/search?q=Nejla%20Mahjoub%20Said"> Nejla Mahjoub Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Herv%C3%A9%20Bournot"> Hervé Bournot</a>, <a href="https://publications.waset.org/abstracts/search?q=Georges%20Le%20Palec"> Georges Le Palec</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this work, we determine the turbulent dynamic structure of pollutant dispersion in two-phase free surface flow. The numerical simulation was performed using ANSYS Fluent. The flow study is three-dimensional, unsteady and isothermal. The study area has been endowed with a rectangular obstacle to analyze its influence on the hydrodynamic variables and progression of the pollutant. The numerical results show that the hydrodynamic model provides prediction of the dispersion of a pollutant in an open channel flow and reproduces the recirculation and trapping the pollutant downstream near the obstacle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CFD" title="CFD">CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=free%20surface" title=" free surface"> free surface</a>, <a href="https://publications.waset.org/abstracts/search?q=polluant%20dispersion" title=" polluant dispersion"> polluant dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flows" title=" turbulent flows"> turbulent flows</a> </p> <a href="https://publications.waset.org/abstracts/30237/cfd-modeling-of-pollutant-dispersion-in-a-free-surface-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/30237.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">545</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1891</span> Kinetic and Thermodynamic Study of Nitrates Removal by Sorption on Biochar</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amira%20Touil">Amira Touil</a>, <a href="https://publications.waset.org/abstracts/search?q=Achouak%20Arfaoui"> Achouak Arfaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibtissem%20Mannaii"> Ibtissem Mannaii</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this work is to monitor the process adsorption of nitrates by the biochar via studying the influence of various parameters on the adsorption of this pollutant by biochar in a synthetic aqueous solution. The results which obtained indicate that the 4g/L biochar dose is the most efficient in terms of nitrates removal in aqueous solution. The biochar exhibited a good affinity for nitrates after 1hour of contact. The yield of removal of nitrate by the biochar decreases with the increase of pH of the solution and increases with increasing temperature (60°C>40°C>20°C). The best removal yield is about 80% of the initial concentration introduced (25mg/L) obtained at pH=2, T=60°C, and dose of biochar=4g/L. The second order model fit the nitrate adsorption kinetics of biochar with a high coefficient of determination (R2≥0.997); and a new equation correlating the rate constant of the reaction with temperature and pH was been built. Freundlich isotherms performed well to fit the nitrate adsorption data by biochar (R2>0.96) compared to Langmuir isotherms. The thermodynamic parameters (ΔH°, ΔG°, ΔS°) have been calculated for predicting the nature of adsorption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pollution" title="pollution">pollution</a>, <a href="https://publications.waset.org/abstracts/search?q=biochar" title=" biochar"> biochar</a>, <a href="https://publications.waset.org/abstracts/search?q=nitrate" title=" nitrate"> nitrate</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a> </p> <a href="https://publications.waset.org/abstracts/156278/kinetic-and-thermodynamic-study-of-nitrates-removal-by-sorption-on-biochar" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/156278.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">95</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1890</span> The Influence of the Discharge Point Position on the Pollutant Dispersion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sonia%20Ben%20Hamza">Sonia Ben Hamza</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabra%20Habli"> Sabra Habli</a>, <a href="https://publications.waset.org/abstracts/search?q=Nejla%20Mahjoub%20Said"> Nejla Mahjoub Said</a>, <a href="https://publications.waset.org/abstracts/search?q=Herv%C3%A9%20Bournot"> Hervé Bournot</a>, <a href="https://publications.waset.org/abstracts/search?q=Georges%20Le%20Palec"> Georges Le Palec </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The distribution characteristics of pollutants released at different vertical inlet positions of an open channel are investigated with a three-dimensional numerical model. Pollutants are injected from time-dependent sources in a turbulent free surface flow. Numerical computations were carried out using ANSYS Fluent which is based on the finite volume approach. The air/water interface was modeled with the volume of the fluid method (VOF). By focusing on investigating the influences of flow on pollutants, it is found that pollutant released from the bottom position of the channel takes more time to disperse in the longitudinal direction of the flow in comparison with the case of pollutant released near the free surface. On the other hand, the pollutant released from the bottom position generates a vertical dispersion with decreased amplitude. These findings may assist in cost-effective scientific countermeasures to be taken for accident or planned pollutant discharged into a river. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title="numerical simulation">numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20release" title=" pollutant release"> pollutant release</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20free%20surface%20flow" title=" turbulent free surface flow"> turbulent free surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=VOF%20model" title=" VOF model"> VOF model</a> </p> <a href="https://publications.waset.org/abstracts/28381/the-influence-of-the-discharge-point-position-on-the-pollutant-dispersion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/28381.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">514</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1889</span> Removal of Perchloroethylene, a Common Pollutant, in Groundwater Using Activated Carbon</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marianne%20Miguet">Marianne Miguet</a>, <a href="https://publications.waset.org/abstracts/search?q=Ga%C3%ABl%20Plantard"> Gaël Plantard</a>, <a href="https://publications.waset.org/abstracts/search?q=Yves%20Jaeger"> Yves Jaeger</a>, <a href="https://publications.waset.org/abstracts/search?q=Vincent%20Goetz"> Vincent Goetz</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The contamination of groundwater is a major concern. A common pollutant, the perchloroethylene, is the target contaminant. Water treatment process as Granular Activated Carbons are very efficient but requires pilot-scale testing to determine the full-scale GAC performance. First, the batch mode was used to get a reliable experimental method to estimate the adsorption capacity of a common volatile compound is settled. The Langmuir model is acceptable to fit the isotherms. Dynamic tests were performed with three columns and different operating conditions. A database of concentration profiles and breakthroughs were obtained. The resolution of the set of differential equations is acceptable to fit the dynamics tests and could be used for a full-scale adsorber. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activated%20carbon" title="activated carbon">activated carbon</a>, <a href="https://publications.waset.org/abstracts/search?q=groundwater" title=" groundwater"> groundwater</a>, <a href="https://publications.waset.org/abstracts/search?q=perchloroethylene" title=" perchloroethylene"> perchloroethylene</a>, <a href="https://publications.waset.org/abstracts/search?q=full-scale" title=" full-scale"> full-scale</a> </p> <a href="https://publications.waset.org/abstracts/21273/removal-of-perchloroethylene-a-common-pollutant-in-groundwater-using-activated-carbon" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/21273.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">427</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1888</span> Magnetic Chloromethylated Polymer Nanocomposite for Selective Pollutant Removal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fabio%20T.%20Costa">Fabio T. Costa</a>, <a href="https://publications.waset.org/abstracts/search?q=Sergio%20E.%20Moya"> Sergio E. Moya</a>, <a href="https://publications.waset.org/abstracts/search?q=Marcelo%20H.%20Sousa"> Marcelo H. Sousa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nanocomposites designed by embedding magnetic nanoparticles into a polymeric matrix stand out as ideal magnetic-hybrid and magneto-responsive materials as sorbents for removal of pollutants in environmental applications. Covalent coupling is often desired for the immobilization of species on these nanocomposites, in order to keep them permanently bounded, not desorbing or leaching over time. Moreover, unwanted adsorbates can be separated by successive washes/magnetic separations, and it is also possible to recover the adsorbate covalently bound to the nanocomposite surface through detaching/cleavage protocols. Thus, in this work, we describe the preparation and characterization of highly-magnetizable chloromethylated polystyrene-based nanocomposite beads for selective covalent coupling in environmental applications. For synthesis optimization, acid resistant core-shelled maghemite (γ-Fe₂O₃) nanoparticles were coated with oleate molecules and directly incorporated into the organic medium during a suspension polymerization process. Moreover, the cross-linking agent ethylene glycol dimethacrylate (EGDMA) was utilized for co-polymerization with the 4-vinyl benzyl chloride (VBC) to increase the resistance of microbeads against leaching. After characterizing samples with XRD, ICP-OES, TGA, optical, SEM and TEM microscopes, a magnetic composite consisting of ~500 nm-sized cross-linked polymeric microspheres embedding ~8 nm γ-Fe₂O₃ nanoparticles was verified. This nanocomposite showed large room temperature magnetization (~24 emu/g) due to the high content in maghemite (~45 wt%) and resistance against leaching even in acidic media. Moreover, the presence of superficial chloromethyl groups, probed by FTIR and XPS spectroscopies and confirmed by an amination test can selectively adsorb molecules through the covalent coupling and be used in molecular separations as shown for the selective removal of 4-aminobenzoic acid from a mixture with benzoic acid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title="nanocomposite">nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=magnetic%20nanoparticle" title=" magnetic nanoparticle"> magnetic nanoparticle</a>, <a href="https://publications.waset.org/abstracts/search?q=covalent%20separation" title=" covalent separation"> covalent separation</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20removal" title=" pollutant removal"> pollutant removal</a> </p> <a href="https://publications.waset.org/abstracts/105175/magnetic-chloromethylated-polymer-nanocomposite-for-selective-pollutant-removal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/105175.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">111</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1887</span> Preparation of Fe, Cr Codoped TiO2 Nanostructure for Phenol Removal from Wastewaters</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Nowzari-Dalini">N. Nowzari-Dalini</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Sabbaghi"> S. Sabbaghi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Phenol is a hazardous material found in many industrial wastewaters. Photocatalytic degradation and furthermore catalyst doping are promising techniques in purpose of effective phenol removal, which have been studied comprehensively in this decade. In this study, Fe, Cr codoped TiO<sub>2</sub> were prepared by sol-gel method, and its photocatalytic activity was investigated through degradation of phenol under visible light. The catalyst was characterized by XRD, SEM, FT-IR, BET, and EDX. The results showed that nanoparticles possess anatase phase, and the average size of nanoparticles was about 21 nm. Also, photocatalyst has significant surface area. Effect of experimental parameters such as pH, irradiation time, pollutant concentration, and catalyst concentration were investigated by using Design-Expert<sup>®</sup> software. 98% of phenol degradation was achieved after 6h of irradiation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=doping" title="doping">doping</a>, <a href="https://publications.waset.org/abstracts/search?q=metals" title=" metals"> metals</a>, <a href="https://publications.waset.org/abstracts/search?q=sol-gel" title=" sol-gel"> sol-gel</a>, <a href="https://publications.waset.org/abstracts/search?q=titanium%20dioxide" title=" titanium dioxide"> titanium dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a> </p> <a href="https://publications.waset.org/abstracts/59934/preparation-of-fe-cr-codoped-tio2-nanostructure-for-phenol-removal-from-wastewaters" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59934.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">328</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1886</span> Divalent Iron Oxidative Process for Degradation of Carbon and Nitrogen Based Pollutants from Dye Intermediate Industrial Wastewater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nibedita%20Pani">Nibedita Pani</a>, <a href="https://publications.waset.org/abstracts/search?q=Vishnu%20Tejani"> Vishnu Tejani</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20S.%20Anantha%20Singh"> T. S. Anantha Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Water pollution resulting from discharge of partial/not treated textile wastewater containing high carbon and nitrogen pollutants pose a huge threat to the environment, ecosystem, and human health. It is essential to remove carbon- and nitrogen-based organic pollutants more effectively from industrial wastewater before discharging. The present study focuses on removal of carbon-based pollutant in particular COD (chemical oxygen demand) and nitrogen-based pollutants, in particular, ammoniacal nitrogen by Fenton oxidation process using Fe²⁺ and H₂O₂ as reagents. The study was carried out with high strength wastewater containing initial COD 5632 mg/L and NH⁴⁺-N 1372 mg/L. The major operating condition like pH was varied between 1.0 to 4.0. The maximum degradation was obtained at pH 3.0 taking the molar ratio of Fe²⁺/H₂O₂ as 1:1. At this pH, the removal efficiencies of COD and ammoniacal nitrogen were found to be 77.27% and 74.9%, respectively. The Fenton process can be the best alternative for the simultaneous removal of COD and NH4+-N from industrial wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ammoniacal%20nitrogen" title="ammoniacal nitrogen">ammoniacal nitrogen</a>, <a href="https://publications.waset.org/abstracts/search?q=COD" title=" COD"> COD</a>, <a href="https://publications.waset.org/abstracts/search?q=Fenton%20oxidation" title=" Fenton oxidation"> Fenton oxidation</a>, <a href="https://publications.waset.org/abstracts/search?q=industrial%20wastewater" title=" industrial wastewater"> industrial wastewater</a> </p> <a href="https://publications.waset.org/abstracts/92225/divalent-iron-oxidative-process-for-degradation-of-carbon-and-nitrogen-based-pollutants-from-dye-intermediate-industrial-wastewater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92225.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">204</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1885</span> Protein and Mineral Removal from Dairy Waste-Water Using Precipitation Process </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Zahra%20Akbari">Zahra Akbari</a>, <a href="https://publications.waset.org/abstracts/search?q=Farzin%20Zokaee"> Farzin Zokaee</a>, <a href="https://publications.waset.org/abstracts/search?q=Talat%20Ghomashchi"> Talat Ghomashchi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Whey is a by-product of the dairy industry whose major components are lactose (44–52 g/L), proteins (6–8 g/L) and mineral salts (4–9 g/L). Approximately 50% of 121 million tons of whey produced in the world in 1993 were disposed into rivers, lakes or other water bodies, treated in wastewater treatment plants or loaded onto land. This represents a significant loss of resources and causes serious pollution problems since whey is a heavy organic pollutant with high COD and BOD values, 40–60 g/L and 50–80 g/L, respectively. The removal of cheese whey proteins and minerals represent an important task both in environmental and in food sciences. The most important treatments which are considered in this study, have been done by using lime, Al2O3, FeCl3 and AlCl3 along with heating and also acidic-alkaline method. Results show that the best way for removal of protein is accomplished with adding HCl to decrease pH from 6 to 4, boiling for 20 min, and filtering protein aggregates. Also partial demineralization in whey solution for reducing ash is accomplished by adding NaOH to increase pH to 7.2 and heating solution for 20 min. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=whey%20treatment" title="whey treatment">whey treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=dairy%20industry" title=" dairy industry"> dairy industry</a>, <a href="https://publications.waset.org/abstracts/search?q=precipitation" title=" precipitation"> precipitation</a>, <a href="https://publications.waset.org/abstracts/search?q=protein" title=" protein"> protein</a>, <a href="https://publications.waset.org/abstracts/search?q=mineral" title=" mineral"> mineral</a> </p> <a href="https://publications.waset.org/abstracts/33426/protein-and-mineral-removal-from-dairy-waste-water-using-precipitation-process" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33426.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">415</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1884</span> A Study of Anoxic - Oxic Microbiological Technology for Treatment of Heavy Oily Refinery Wastewater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Di%20Wang">Di Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Li%20Fang"> Li Fang</a>, <a href="https://publications.waset.org/abstracts/search?q=Shengyu%20Fang"> Shengyu Fang</a>, <a href="https://publications.waset.org/abstracts/search?q=Jianhua%20Li"> Jianhua Li</a>, <a href="https://publications.waset.org/abstracts/search?q=Honghong%20Dong"> Honghong Dong</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhongzhi%20Zhang"> Zhongzhi Zhang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Heavy oily refinery wastewater with the characteristics of high concentration of toxic organic pollutant, poor biodegradability and complicated dissolved recalcitrant compounds is intractable to be degraded. In order to reduce the concentrations of COD and total nitrogen pollutants which are the major pollutants in heavy oily refinery wastewater, the Anoxic - Oxic microbiological technology relies mainly on anaerobic microbial reactor which works with methanogenic archaea mainly that can convert organic pollutants to methane gas, and supplemented by aerobic treatment. The results of continuous operation for 2 months with a hydraulic retention time (HRT) of 60h showed that, the COD concentration from influent water of anaerobic reactor and effluent water from aerobic reactor were 547.8mg/L and 93.85mg/L, respectively. The total removal rate of COD was up to 84.9%. Compared with the 46.71mg/L of total nitrogen pollutants in influent water of anaerobic reactor, the concentration of effluent water of aerobic reactor decreased to 14.11mg/L. In addition, the average removal rate of total nitrogen pollutants reached as high as 69.8%. Based on the data displayed, Anoxic - Oxic microbial technology shows a great potential to dispose heavy oil sewage in energy saving and high-efficiency of biodegradation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anoxic%20-%20oxic%20microbiological%20technology" title="anoxic - oxic microbiological technology">anoxic - oxic microbiological technology</a>, <a href="https://publications.waset.org/abstracts/search?q=COD" title=" COD"> COD</a>, <a href="https://publications.waset.org/abstracts/search?q=heavy%20oily%20refinery%20wastewater" title=" heavy oily refinery wastewater"> heavy oily refinery wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=total%20nitrogen%20pollutant" title=" total nitrogen pollutant"> total nitrogen pollutant</a> </p> <a href="https://publications.waset.org/abstracts/41908/a-study-of-anoxic-oxic-microbiological-technology-for-treatment-of-heavy-oily-refinery-wastewater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41908.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">494</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1883</span> Removal of Nitenpyram from Farmland Runoff by an Integrated Ecological Ditches with Constructed Wetland System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dan%20Qu">Dan Qu</a>, <a href="https://publications.waset.org/abstracts/search?q=Dezhi%20Sun"> Dezhi Sun</a>, <a href="https://publications.waset.org/abstracts/search?q=Benhang%20Li"> Benhang Li</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The removal of Nitenpyram from farmland runoff by an integrated eco-ditches and constructed wetland system was investigated in the case of different HRT. Experimental results show that the removal of COD, N and P was not influenced by the Nitenpyram. When the HRT was 2.5 d, 2 d, and 1 d, the Nitenpyram removal efficiency could reach 100%, 100% and 84%, respectively. The removal efficiency in the ecological ditches was about 38%-40% in the case of different HRT, while that in the constructed wetland was influenced by the HRT variation. The optimum HRT for Nitenpyram and pollutants removal was 2 d. The substrate zeolite with soil and hollow brick layer enabled higher Nitenpyram removal rates, probably due to the cooperative phenomenon of plant uptake and microbiological deterioration as well as the adsorption by the substrate. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ecological%20ditch" title="ecological ditch">ecological ditch</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20flow%20constructed%20wetland" title=" vertical flow constructed wetland"> vertical flow constructed wetland</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20retention%20time" title=" hydraulic retention time"> hydraulic retention time</a>, <a href="https://publications.waset.org/abstracts/search?q=Nitenpyram" title=" Nitenpyram"> Nitenpyram</a> </p> <a href="https://publications.waset.org/abstracts/65542/removal-of-nitenpyram-from-farmland-runoff-by-an-integrated-ecological-ditches-with-constructed-wetland-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/65542.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">402</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1882</span> Preparation of Sorbent Materials for the Removal of Hardness and Organic Pollutants from Water and Wastewater</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Thanaa%20Abdel%20Moghny">Thanaa Abdel Moghny</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Keshawy"> Mohamed Keshawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Fathy"> Mahmoud Fathy</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdul-Raheim%20M.%20Abdul-Raheim"> Abdul-Raheim M. Abdul-Raheim</a>, <a href="https://publications.waset.org/abstracts/search?q=Khalid%20I.%20Kabel"> Khalid I. Kabel</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20F.%20El-Kafrawy"> Ahmed F. El-Kafrawy</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahmoud%20Ahmed%20Mousa"> Mahmoud Ahmed Mousa</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20E.%20Awadallah"> Ahmed E. Awadallah</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ecological pollution is of great concern for human health and the environment. Numerous organic and inorganic pollutants usually discharged into the water caused carcinogenic or toxic effect for human and different life form. In this respect, this work aims to treat water contaminated by organic and inorganic waste using sorbent based on polystyrene. Therefore, two different series of adsorbent material were prepared; the first one included the preparation of polymeric sorbent from the reaction of styrene acrylate ester and alkyl acrylate. The second series involved syntheses of composite ion exchange resins of waste polystyrene and   amorphous carbon thin film (WPS/ACTF) by solvent evaporation using micro emulsion polymerization. The produced ACTF/WPS nanocomposite was sulfonated to produce cation exchange resins ACTF/WPSS nanocomposite. The sorbents of the first series were characterized using FTIR, <sup>1</sup>H NMR, and gel permeation chromatography. The thermal properties of the cross-linked sorbents were investigated using thermogravimetric analysis, and the morphology was characterized by scanning electron microscope (SEM). The removal of organic pollutant was determined through absorption tests in a various organic solvent. The chemical and crystalline structure of nanocomposite of second series has been proven by studies of FTIR spectrum, X-rays, thermal analysis, SEM and TEM analysis to study morphology of resins and ACTF that assembled with polystyrene chain. It is found that the composite resins ACTF/WPSS are thermally stable and show higher chemical stability than ion exchange WPSS resins. The composite resin was evaluated for calcium hardness removal. The result is evident that the ACTF/WPSS composite has more prominent inorganic pollutant removal than WPSS resin. So, we recommend the using of nanocomposite resin as new potential applications for water treatment process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nanocomposite" title="nanocomposite">nanocomposite</a>, <a href="https://publications.waset.org/abstracts/search?q=sorbent%20materials" title=" sorbent materials"> sorbent materials</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20water" title=" waste water"> waste water</a>, <a href="https://publications.waset.org/abstracts/search?q=waste%20polystyrene" title=" waste polystyrene"> waste polystyrene</a> </p> <a href="https://publications.waset.org/abstracts/71457/preparation-of-sorbent-materials-for-the-removal-of-hardness-and-organic-pollutants-from-water-and-wastewater" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/71457.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">429</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1881</span> A Three-Dimensional (3D) Numerical Study of Roofs Shape Impact on Air Quality in Urban Street Canyons with Tree Planting </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Bouabdellah%20Abed">Bouabdellah Abed</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Bouzit"> Mohamed Bouzit</a>, <a href="https://publications.waset.org/abstracts/search?q=Lakhdar%20Bouarbi"> Lakhdar Bouarbi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this study is to investigate numerically the effect of roof shaped on wind ﬂow and pollutant dispersion in a street canyon with one row of trees of pore volume, Pvol = 96%. A three-dimensional computational ﬂuid dynamics (CFD) model for evaluating air ﬂow and pollutant dispersion within an urban street canyon using Reynolds-averaged Navier–Stokes (RANS) equations and the k-Epsilon EARSM turbulence model as close of the equation system. The numerical model is performed with ANSYS-CFX code. Vehicle emissions were simulated as double line sources along the street. The numerical model was validated against the wind tunnel experiment. Having established this, the wind ﬂow and pollutant dispersion in urban street canyons of six roof shapes are simulated. The numerical simulation agrees reasonably with the wind tunnel data. The results obtained in this work, indicate that the flow in 3D domain is more complicated, this complexity is increased with presence of tree and variability of the roof shapes. The results also indicated that the largest pollutant concentration level for two walls (leeward and windward wall) is observed with the upwind wedge-shaped roof. But the smallest pollutant concentration level is observed with the dome roof-shaped. The results also indicated that the corners eddies provide additional ventilation and lead to lower traffic pollutant concentrations at the street canyon ends. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=street%20canyon" title="street canyon">street canyon</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20dispersion" title=" pollutant dispersion"> pollutant dispersion</a>, <a href="https://publications.waset.org/abstracts/search?q=trees" title=" trees"> trees</a>, <a href="https://publications.waset.org/abstracts/search?q=building%20configuration" title=" building configuration"> building configuration</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20simulation" title=" numerical simulation"> numerical simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=k-Epsilon%20EARSM" title=" k-Epsilon EARSM"> k-Epsilon EARSM</a> </p> <a href="https://publications.waset.org/abstracts/40266/a-three-dimensional-3d-numerical-study-of-roofs-shape-impact-on-air-quality-in-urban-street-canyons-with-tree-planting" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/40266.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">366</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1880</span> Carbon Dioxide Removal from Off Gases in a Self-Priming Submerged Venturi Scrubber </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manisha%20Bal">Manisha Bal</a>, <a href="https://publications.waset.org/abstracts/search?q=Amit%20Verma"> Amit Verma</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20C.%20Meikap"> B. C. Meikap</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Carbon dioxide (CO₂) is the most abundant waste produced by human activities. It is estimated to be one of the major contributors of greenhouse effect and also considered as a major air pollutant formed by burning of fossil fuels. The main sources of emissions are flue gas from thermal power plants and process industries. It is also a contributor of acid rain. Its exposure through inhalation can lead to health risks. Therefore, control of CO₂ emission in the environment is very necessary. The main focus of this study is on the removal of carbon dioxide from off gases using a self-priming venturi scrubber in submerged conditions using sodium hydroxide as the scrubbing liquid. A self-priming submerged venturi scrubber is an efficient device to remove gaseous pollutants. In submerged condition, venturi scrubber remains submerged in the liquid tank and the liquid enters at the throat section of venturi scrubber due to the pressure difference which includes the hydrostatic pressure of the liquid and static pressure of the gas. The inlet polluted air stream enters through converging section which moves at very high velocity in the throat section and atomizes the liquid droplets. This leads to absorption of CO₂ from the off gases in scrubbing liquid which resulted in removal of CO₂ gas from the off gases. Detailed investigation on the scrubbing of carbon dioxide has been done in this literature. Experiments were conducted at different throat gas velocities, liquid levels in outer cylinder and CO₂ inlet concentrations to study the carbon dioxide removal efficiency. Experimental results give more than 95% removal efficiency of CO₂ in the self priming venturi scrubber which can meet the environmental emission limit of CO₂ to save the human life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=carbon%20dioxide" title="carbon dioxide">carbon dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=scrubbing" title=" scrubbing"> scrubbing</a>, <a href="https://publications.waset.org/abstracts/search?q=pollution%20control" title=" pollution control"> pollution control</a>, <a href="https://publications.waset.org/abstracts/search?q=self-priming%20venturi%20scrubber" title=" self-priming venturi scrubber"> self-priming venturi scrubber</a> </p> <a href="https://publications.waset.org/abstracts/100123/carbon-dioxide-removal-from-off-gases-in-a-self-priming-submerged-venturi-scrubber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/100123.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">222</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1879</span> Microalgae Bacteria Granules, an Alternative Technology to the Conventional Wastewater Treatment: Structural and Metabolic Characterization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Nita-Lazar">M. Nita-Lazar</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Manea"> E. Manea</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Bumbac"> C. Bumbac</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Banciu"> A. Banciu</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Stoica"> C. Stoica</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The population and economic growth have generated a significant new number of pollutant compounds which have to be degraded before reaching the environment. The wastewater treatment plants (WWTPs) have been the last barrier between the domestic and/or industrial wastewaters and the environment. At present, the conventional WWTPs have very high operational costs, most of them linked to the aeration process (60-65% from total energy costs related to wastewater treatment). In addition, they have had a low efficiency in pollutants removal such as pharmaceutical and other resilient anthropogenic compounds. In our study, we have been focused on new wastewater treatment strategies to enhance the efficiency of pollutants removal and decrease the wastewater treatment operational costs. The usage of mixed microalgae-bacteria granules technology generated high efficiency and low costs by a better harvesting and less expensive aeration. The intertrophic relationships between microalgae and bacteria have been characterized by the structure of the population community to their metabolic relationships. The results, obtained by microscopic studies, showed well-organized and stratified microalgae-bacteria granules where bacteria have been enveloped in the microalgal structures. Moreover, their population community structure has been modulated as well as their nitrification, denitrification processes (analysis based on qPCR genes expression) by the type of the pollutant compounds and amounts. In conclusion, the understanding and modulation of intertrophic relationships between microalgae and bacteria could be an economical and technological viable alternative to the conventional wastewater treatment. Acknowledgements: This research was supported by grant PN-III-P4-ID-PCE-2016-0865 from the Romanian National Authority for Scientific Research and Innovation CNCS/CCCDI-UEFISCDI. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=activated%20sludge" title="activated sludge">activated sludge</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a>, <a href="https://publications.waset.org/abstracts/search?q=granules" title=" granules"> granules</a>, <a href="https://publications.waset.org/abstracts/search?q=microalgae" title=" microalgae"> microalgae</a> </p> <a href="https://publications.waset.org/abstracts/112965/microalgae-bacteria-granules-an-alternative-technology-to-the-conventional-wastewater-treatment-structural-and-metabolic-characterization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/112965.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">124</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1878</span> Dust Particle Removal from Air in a Self-Priming Submerged Venturi Scrubber</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Manisha%20Bal">Manisha Bal</a>, <a href="https://publications.waset.org/abstracts/search?q=Remya%20Chinnamma%20Jose"> Remya Chinnamma Jose</a>, <a href="https://publications.waset.org/abstracts/search?q=B.C.%20Meikap"> B.C. Meikap</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dust particles suspended in air are a major source of air pollution. A self-priming submerged venturi scrubber proven very effective in cases of handling nuclear power plant accidents is an efficient device to remove dust particles from the air and thus aids in pollution control. Venturi scrubbers are compact, have a simple mode of operation, no moving parts, easy to install and maintain when compared to other pollution control devices and can handle high temperatures and corrosive and flammable gases and dust particles. In the present paper, fly ash particles recognized as a high air pollutant substance emitted mostly from thermal power plants is considered as the dust particle. Its exposure through skin contact, inhalation and indigestion can lead to health risks and in severe cases can even root to lung cancer. The main focus of this study is on the removal of fly ash particles from polluted air using a self-priming venturi scrubber in submerged conditions using water as the scrubbing liquid. The venturi scrubber comprising of three sections: converging section, throat and diverging section is submerged inside a water tank. The liquid enters the throat due to the pressure difference composed of the hydrostatic pressure of the liquid and static pressure of the gas. The high velocity dust particles atomize the liquid droplets at the throat and this interaction leads to its absorption into water and thus removal of fly ash from the air. Detailed investigation on the scrubbing of fly ash has been done in this literature. Experiments were conducted at different throat gas velocities, water levels and fly ash inlet concentrations to study the fly ash removal efficiency. From the experimental results, the highest fly ash removal efficiency of 99.78% is achieved at the throat gas velocity of 58 m/s, water level of height 0.77m with fly ash inlet concentration of 0.3 x10⁻³ kg/Nm³ in the submerged condition. The effect of throat gas velocity, water level and fly ash inlet concentration on the removal efficiency has also been evaluated. Furthermore, experimental results of removal efficiency are validated with the developed empirical model. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dust%20particles" title="dust particles">dust particles</a>, <a href="https://publications.waset.org/abstracts/search?q=fly%20ash" title=" fly ash"> fly ash</a>, <a href="https://publications.waset.org/abstracts/search?q=pollution%20control" title=" pollution control"> pollution control</a>, <a href="https://publications.waset.org/abstracts/search?q=self-priming%20venturi%20scrubber" title=" self-priming venturi scrubber"> self-priming venturi scrubber</a> </p> <a href="https://publications.waset.org/abstracts/97531/dust-particle-removal-from-air-in-a-self-priming-submerged-venturi-scrubber" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97531.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">164</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1877</span> Impacts of CuO, TiO2, SiO2 Nanoparticles on Biological Phosphorus Removal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Shiu">H. Shiu</a>, <a href="https://publications.waset.org/abstracts/search?q=M.S.%20Lu"> M.S. Lu</a>, <a href="https://publications.waset.org/abstracts/search?q=Y.P.%20Tsai"> Y.P. Tsai</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study explored the impacts of CuO, TiO2, SiO2 nanoparticles on biological phosphorus removal. Experimental results showed that the phosphorus removal ability of phosphorus accumulating organism (PAO) was initially inhibited when CuO nanoparticle concentration was 5 mgl-1. The inhibition of phosphorus removal for 1000 mgl-1 of TiO2 with sunlight was higher than without sunlight case. The inhibition of phosphorus removal began at 500 mgl-1 SiO2 nanoparticle concentration. Inhibition became apparent when SiO2 nanoparticle concentration was up to 1000 mgl-1. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=nano%20copper%20oxide" title="nano copper oxide">nano copper oxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20titanium%20dioxide" title=" nano titanium dioxide"> nano titanium dioxide</a>, <a href="https://publications.waset.org/abstracts/search?q=nano%20silica" title=" nano silica"> nano silica</a>, <a href="https://publications.waset.org/abstracts/search?q=enhanced%20biological%20phosphate%20removal" title=" enhanced biological phosphate removal"> enhanced biological phosphate removal</a> </p> <a href="https://publications.waset.org/abstracts/6388/impacts-of-cuo-tio2-sio2-nanoparticles-on-biological-phosphorus-removal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/6388.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">379</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1876</span> Nutrients Removal Control via an Intermittently Aerated Membrane Bioreactor</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Junior%20B.%20N.%20Adohinzin">Junior B. N. Adohinzin</a>, <a href="https://publications.waset.org/abstracts/search?q=Ling%20Xu"> Ling Xu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Nitrogen is among the main nutrients encouraging the growth of organic matter and algae which cause eutrophication in water bodies. Therefore, its removal from wastewater has become a worldwide emerging concern. In this research, an innovative Membrane Bioreactor (MBR) system named “moving bed membrane bioreactor (MBMBR)” was developed and investigated under intermittently-aerated mode for simultaneous removal of organic carbon and nitrogen. Results indicated that the variation of the intermittently aerated duration did not have an apparent impact on COD and NH4+–N removal rate, yielding the effluent with average COD and NH4+–N removal efficiency of more than 92 and 91% respectively. However, in the intermittently aerated cycle of (continuously aeration/0s mix), (aeration 90s/mix 90s) and (aeration 90s/mix 180s); the average TN removal efficiency was 67.6%, 69.5% and 87.8% respectively. At the same time, their nitrite accumulation rate was 4.5%, 49.1% and 79.4% respectively. These results indicate that the intermittently aerated mode is an efficient way to controlling the nitrification to stop at nitrition; and also the length of anoxic duration is a key factor in improving TN removal. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=membrane%20bioreactor%20%28MBR%29" title="membrane bioreactor (MBR)">membrane bioreactor (MBR)</a>, <a href="https://publications.waset.org/abstracts/search?q=moving%20bed%20biofilm%20reactor%20%28MBBR%29" title=" moving bed biofilm reactor (MBBR)"> moving bed biofilm reactor (MBBR)</a>, <a href="https://publications.waset.org/abstracts/search?q=nutrients%20removal" title=" nutrients removal"> nutrients removal</a>, <a href="https://publications.waset.org/abstracts/search?q=simultaneous%20nitrification%20and%20denitrification" title=" simultaneous nitrification and denitrification"> simultaneous nitrification and denitrification</a> </p> <a href="https://publications.waset.org/abstracts/10455/nutrients-removal-control-via-an-intermittently-aerated-membrane-bioreactor" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10455.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1875</span> Removal of P-Nitrophenol in Wastewater by Using Fe-Nano Zeolite Synthesized</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pham-Thi%20Huong">Pham-Thi Huong</a>, <a href="https://publications.waset.org/abstracts/search?q=Byeong-Kyu%20Lee"> Byeong-Kyu Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Chi-Hyeon%20Lee"> Chi-Hyeon Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=JiTae%20Kim"> JiTae Kim</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study analyzed the removal of p-nitrophenol from wastewater using Fe-nano zeolite synthesized. The basic physical-chemical properties of Fe-nano zeolite was determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy. We focus on finding out the optimum conditions in adsorption and desorption processes for removal of p-nitrophenol by using Fe-nano zeolite in wastewater. The optimum pH for p-nitrophenol removal in wastewater was 5.0. Adsorption isotherms were better fitted with the Langmuir isotherm than with the Freundlich with 165.58 mg/g adsorption capacity of p-nitrophenol. These findings support potential of Fe-nano zeolite as an effective adsorbent for p-nitrophenol removal from wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Fe-nano%20zeolite" title="Fe-nano zeolite">Fe-nano zeolite</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater" title=" wastewater"> wastewater</a>, <a href="https://publications.waset.org/abstracts/search?q=regeneration" title=" regeneration"> regeneration</a> </p> <a href="https://publications.waset.org/abstracts/44511/removal-of-p-nitrophenol-in-wastewater-by-using-fe-nano-zeolite-synthesized" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44511.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">311</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1874</span> Pollutant Loads of Urban Runoff from a Mixed Residential-Commercial Catchment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Carrie%20Ho">Carrie Ho</a>, <a href="https://publications.waset.org/abstracts/search?q=Tan%20Yee%20Yong"> Tan Yee Yong</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Urban runoff quality for a mixed residential-commercial land use catchment in Miri, Sarawak was investigated for three storm events in 2011. Samples from the three storm events were tested for five water quality parameters, Namely, TSS, COD, BOD5, TP, and Pb. Concentration of the pollutants were found to vary significantly between storms, but were generally influenced by the length of antecedent dry period and the strength of rainfall intensities. Runoff from the study site showed a significant level of pollution for all the parameters investigated. Based on the National Water Quality Standards for Malaysia (NWQS), stormwater quality from the study site was polluted and exceeded class III water for TSS and BOD5 with maximum EMCs of 177 and 24 mg/L, respectively. Design pollutant load based on a design storm of 3-month average recurrence interval (ARI) for TSS, COD, BOD5, TP, and Pb were estimated to be 40, 9.4, 5.4, 1.7, and 0.06 kg/ha, respectively. The design pollutant load for the pollutants can be used to estimate loadings from similar catchments within Miri City. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mixed%20land-use" title="mixed land-use">mixed land-use</a>, <a href="https://publications.waset.org/abstracts/search?q=urban%20runoff" title=" urban runoff"> urban runoff</a>, <a href="https://publications.waset.org/abstracts/search?q=pollutant%20load" title=" pollutant load"> pollutant load</a>, <a href="https://publications.waset.org/abstracts/search?q=national%20water%20quality" title=" national water quality"> national water quality</a> </p> <a href="https://publications.waset.org/abstracts/1608/pollutant-loads-of-urban-runoff-from-a-mixed-residential-commercial-catchment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/1608.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">333</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1873</span> UF as Pretreatment of RO for Tertiary Treatment of Biologically Treated Distillery Spentwash</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Pinki%20Sharma">Pinki Sharma</a>, <a href="https://publications.waset.org/abstracts/search?q=Himanshu%20Joshi"> Himanshu Joshi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Distillery spentwash contains high chemical oxygen demand (COD), biological oxygen demand (BOD), color, total dissolved solids (TDS) and other contaminants even after biological treatment. The effluent can’t be discharged as such in the surface water bodies or land without further treatment. Reverse osmosis (RO) treatment plants have been installed in many of the distilleries at tertiary level. But at most of the places these plants are not properly working due to high concentration of organic matter and other contaminants in biologically treated spentwash. To make the membrane treatment proven and reliable technology, proper pre-treatment is mandatory. In the present study, ultra-filtration (UF) as pre-treatment of RO at tertiary stage was performed. Operating parameters namely initial pH (pHo: 2–10), trans-membrane pressure (TMP: 4-20 bars) and temperature (T: 15- 43°C) used for conducting experiments with UF system. Experiments were optimized at different operating parameters in terms of COD, color, TDS and TOC removal by using response surface methodology (RSM) with central composite design. The results showed that removal of COD, color and TDS by 62%, 93.5% and 75.5%, with UF, respectively at optimized conditions with increased permeate flux from 17.5 l/m2/h (RO) to 38 l/m2/h (UF-RO). The performance of the RO system was greatly improved both in term of pollutant removal as well as water recovery. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bio-digested%20distillery%20spentwash" title="bio-digested distillery spentwash">bio-digested distillery spentwash</a>, <a href="https://publications.waset.org/abstracts/search?q=reverse%20osmosis" title=" reverse osmosis"> reverse osmosis</a>, <a href="https://publications.waset.org/abstracts/search?q=response%20surface%20methodology" title=" response surface methodology"> response surface methodology</a>, <a href="https://publications.waset.org/abstracts/search?q=ultra-filtration" title=" ultra-filtration"> ultra-filtration</a> </p> <a href="https://publications.waset.org/abstracts/32696/uf-as-pretreatment-of-ro-for-tertiary-treatment-of-biologically-treated-distillery-spentwash" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/32696.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">347</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1872</span> Functionalized Nanoparticles as Sorbents for Removal of Toxic Species</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jerina%20Majeed">Jerina Majeed</a>, <a href="https://publications.waset.org/abstracts/search?q=Jayshree%20Ramkumar"> Jayshree Ramkumar</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Chandramouleeswaran"> S. Chandramouleeswaran</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20K.%20Tyagi"> A. K. Tyagi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Removal of various toxic species from aqueous streams is of great importance. Sorption is one of the important remediation procedures as it involves the use of cheap and easily available materials. Also the advantage of regeneration of the sorbent involves the possibility of using novel sorbents. Nanosorbents are very important as the removal is based on the surface phenomena and this is greatly affected by surface charge and area. Functionalization has been very important to bring about the removal of metal ions with greater selectivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=mercury" title="mercury">mercury</a>, <a href="https://publications.waset.org/abstracts/search?q=lead" title=" lead"> lead</a>, <a href="https://publications.waset.org/abstracts/search?q=thiol%20functionalization" title=" thiol functionalization"> thiol functionalization</a>, <a href="https://publications.waset.org/abstracts/search?q=ZnO%20NPs" title=" ZnO NPs "> ZnO NPs </a> </p> <a href="https://publications.waset.org/abstracts/10832/functionalized-nanoparticles-as-sorbents-for-removal-of-toxic-species" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10832.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">339</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1871</span> Utilization of Low-Cost Adsorbent Fly Ash for the Removal of Phenol from Water</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ihsanullah">Ihsanullah</a>, <a href="https://publications.waset.org/abstracts/search?q=Muataz%20Ali%20Atieh"> Muataz Ali Atieh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, a low-cost adsorbent carbon fly ash (CFA) was used for the removal of Phenol from the water. The adsorbent characteristics were observed by the Thermogravimetric Analysis (TGA), BET specific surface area analyzer, Zeta Potential and Field Emission Scanning Electron Microscopy (FE-SEM). The effect of pH, agitation speed, contact time, adsorbent dosage, and initial concentration of phenol were studied on the removal of phenol from the water. The optimum values of these variables for maximum removal of phenol were also determined. Both Freundlich and Langmuir isotherm models were successfully applied to describe the experimental data. Results showed that low-cost adsorbent phenol can be successfully applied for the removal of Phenol from the water. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=phenol" title="phenol">phenol</a>, <a href="https://publications.waset.org/abstracts/search?q=fly%20ash" title=" fly ash"> fly ash</a>, <a href="https://publications.waset.org/abstracts/search?q=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=carbon%20adsorbents" title=" carbon adsorbents"> carbon adsorbents</a> </p> <a href="https://publications.waset.org/abstracts/19609/utilization-of-low-cost-adsorbent-fly-ash-for-the-removal-of-phenol-from-water" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/19609.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">325</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1870</span> Catalytic Degradation of Tetracycline in Aqueous Solution by Magnetic Ore Pyrite Nanoparticles </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Allah%20Bakhsh%20Javid">Allah Bakhsh Javid</a>, <a href="https://publications.waset.org/abstracts/search?q=Ali%20Mashayekh-Salehi"> Ali Mashayekh-Salehi</a>, <a href="https://publications.waset.org/abstracts/search?q=Fatemeh%20Davardoost"> Fatemeh Davardoost</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study presents the preparation, characterization and catalytic activity of a novel natural mineral-based catalyst for destructive adsorption of tetracycline (TTC) as water emerging compounds. Degradation potential of raw and calcined magnetite catalyst was evaluated at different experiments situations such as pH, catalyst dose, reaction time and pollutant concentration. Calcined magnetite attained greater catalytic potential than the raw ore in the degradation of tetracycline, around 69% versus 3% at reaction time of 30 min and TTC aqueous solution of 50 mg/L, respectively. Complete removal of TTC could be obtained using 2 g/L calcined nanoparticles at reaction time of 60 min. The removal of TTC increased with the increase in solution temperature. Accordingly, considering its abundance in nature together with its very high catalytic potential, calcined pyrite is a promising and reliable catalytic material for destructive decomposition for catalytic decomposition and mineralization of such pharmaceutical compounds as TTC in water and wastewater. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=catalytic%20degradation" title="catalytic degradation">catalytic degradation</a>, <a href="https://publications.waset.org/abstracts/search?q=tetracycline" title=" tetracycline"> tetracycline</a>, <a href="https://publications.waset.org/abstracts/search?q=pyrite" title=" pyrite"> pyrite</a>, <a href="https://publications.waset.org/abstracts/search?q=emerging%20pollutants" title=" emerging pollutants"> emerging pollutants</a> </p> <a href="https://publications.waset.org/abstracts/97258/catalytic-degradation-of-tetracycline-in-aqueous-solution-by-magnetic-ore-pyrite-nanoparticles" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97258.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">192</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1869</span> Comparison of Chemical Coagulation and Electrocoagulation for Boron Removal from Synthetic Wastewater Using Aluminium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kartikaningsih%20Danis">Kartikaningsih Danis</a>, <a href="https://publications.waset.org/abstracts/search?q=Yao-Hui%20Huang"> Yao-Hui Huang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Various techniques including conventional and advanced have been employed for the boron treatment from water and wastewater. The electrocoagulation involves an electrolytic reactor for coagulation/flotation with aluminium as anode and cathode. There is aluminium as coagulant to be used for removal which may induce secondary pollution in chemical coagulation. The purpose of this study is to investigate and compare the performance between electrocoagulation and chemical coagulation on boron removal from synthetic wastewater. The effect of different parameters, such as pH reaction, coagulant dosage, and initial boron concentration were examined. The results show that the boron removal using chemical coagulation was lower. At the optimum condition (e.g. pH 8 and 0.8 mol coagulant dosage), boron removal efficiencies for chemical coagulation and electrocoagulation were 61% and 91%, respectively. In addition, the electrocoagulation needs no chemical reagents and makes the boron treatment easy for application. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=boron%20removal" title="boron removal">boron removal</a>, <a href="https://publications.waset.org/abstracts/search?q=chemical%20coagulation" title=" chemical coagulation"> chemical coagulation</a>, <a href="https://publications.waset.org/abstracts/search?q=aluminum" title=" aluminum"> aluminum</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-coagulation" title=" electro-coagulation "> electro-coagulation </a> </p> <a href="https://publications.waset.org/abstracts/22930/comparison-of-chemical-coagulation-and-electrocoagulation-for-boron-removal-from-synthetic-wastewater-using-aluminium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/22930.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">404</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1868</span> The Batch Method Approach for Adsorption Mechanism Processes of Some Selected Heavy Metal Ions and Methylene Blue by Using Chemically Modified Luffa Cylindrica</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Akanimo%20Emene">Akanimo Emene</a>, <a href="https://publications.waset.org/abstracts/search?q=Mark%20D.%20Ogden"> Mark D. Ogden</a>, <a href="https://publications.waset.org/abstracts/search?q=Robert%20%20Edyvean"> Robert Edyvean</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Adsorption is a low cost, efficient and economically viable wastewater treatment process. Utilization of this treatment process has not been fully applied due to the complex and not fully understood nature of the adsorption system. To optimize its process is to choose a sufficient adsorbent and to study further the experimental parameters that influence the adsorption design system. Chemically modified adsorbent, Luffa cylindrica, was used to adsorb heavy metal ions and an organic pollutant, methylene blue, from aqueous environmental solution at varying experimental conditions. Experimental factors, adsorption time, initial metal ion or organic pollutant concentration, ionic strength, and pH of solution were studied. The experimental data were analyzed with kinetic and isotherm models. The antagonistic effect of the methylene and some heavy metal ions were recorded. An understanding of the use of this treated Luffa cylindrica for the removal of these toxic substances will establish and improve the commercial application of the adsorption process in treatment of contaminated waters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=adsorption" title="adsorption">adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=heavy%20metal%20ions" title=" heavy metal ions"> heavy metal ions</a>, <a href="https://publications.waset.org/abstracts/search?q=Luffa%20cylindrica" title=" Luffa cylindrica"> Luffa cylindrica</a>, <a href="https://publications.waset.org/abstracts/search?q=wastewater%20treatment" title=" wastewater treatment"> wastewater treatment</a> </p> <a href="https://publications.waset.org/abstracts/56506/the-batch-method-approach-for-adsorption-mechanism-processes-of-some-selected-heavy-metal-ions-and-methylene-blue-by-using-chemically-modified-luffa-cylindrica" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56506.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">198</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pollutant%20removal&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pollutant%20removal&page=3">3</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=pollutant%20removal&page=4">4</a></li> <li class="page-item"><a class="page-link" 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