Search results for: 6- dichlorophenol indophenol

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dichlorophenol indophenol</title> <meta name="description" content="Search results for: 6- dichlorophenol indophenol"> <meta name="keywords" content="6- dichlorophenol indophenol"> <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> 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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="6- dichlorophenol indophenol"> <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> 4</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: 6- dichlorophenol indophenol</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Determination of Vitamin C Red Guava (Psidium guajava Linn) Fruit Juice, with Variation of Beverage Packaging by Titrimetic Method Using 2,6- Dichlorophenol Indophenol</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Novriyanti%20Lubis">Novriyanti Lubis</a>, <a href="https://publications.waset.org/abstracts/search?q=Riska%20Prasetiawati"> Riska Prasetiawati</a>, <a href="https://publications.waset.org/abstracts/search?q=Wulan%20%20Septiani"> Wulan Septiani</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The quantitative analysis of vitamin C content from variations beverage packaging containing red guava (Psidium Guajava Linn) fruit juice had been done. In this study, four samples were obtained from the shopping center in Garut and Bandung City. Samples were tested quantitatively by 2,6-dichlorophenol indophenol titration method. The results showed different concentration of 4 samples consist of tetra pack packaging, tin, glass, and plastic bottles, such as; 17.99 mg/100 gr, 31.46 mg/100 gr, 13.00 mg/100 gr, and 12.01 mg/100 gr, respectively. These results indicated that the packaging variations affected the level of vitamin C content which was characterized by decreased levels of vitamin C. It means the levels of vitamin C from this research were not in accordance with nutritional value information on the packaging. Tetra pack packaging was the most stable compared to other packaging even though it had a shorter expired date than with other. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=vitamin%20C" title="vitamin C">vitamin C</a>, <a href="https://publications.waset.org/abstracts/search?q=variations%20beverage%20packaging" title=" variations beverage packaging"> variations beverage packaging</a>, <a href="https://publications.waset.org/abstracts/search?q=red%20guava" title=" red guava"> red guava</a>, <a href="https://publications.waset.org/abstracts/search?q=titration%202" title=" titration 2"> titration 2</a>, <a href="https://publications.waset.org/abstracts/search?q=6-%20dichlorophenol%20indophenol" title="6- dichlorophenol indophenol">6- dichlorophenol indophenol</a> </p> <a href="https://publications.waset.org/abstracts/76541/determination-of-vitamin-c-red-guava-psidium-guajava-linn-fruit-juice-with-variation-of-beverage-packaging-by-titrimetic-method-using-26-dichlorophenol-indophenol" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/76541.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">239</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">3</span> Adsorption Isotherm, Kinetic and Mechanism Studies of Some Substituted Phenols from Aqueous Solution by Jujuba Seeds Activated Carbon</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=O.%20Benturki">O. Benturki</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Benturki"> A. Benturki</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Activated carbon was prepared from Jujube seeds by chemical activation with potassium hydroxide (KOH), followed by pyrolysis at 800°C. Batch studies were conducted for kinetic, thermodynamic and equilibrium studies on the adsorption of phenol (P) and 2-4 dichlorophenol (2-4 DCP) from aqueous solution, than the adsorption capacities followed the order of 2-4 dichlorophenol > phenol. The operating variables studied were initial phenols concentration, contact time, temperature and solution pH. Results show that the pH value of 7 is favorable for the adsorption of phenols. The sorption data have been analyzed using Langmuir and Freundlich isotherms. The isotherm data followed Langmuir Model. The adsorption processes conformed to the pseudo-second-order rate kinetics. Thermodynamic parameters such as enthalpy, entropy and Gibb’s free energy changes were also calculated and it was found that the sorption of phenols by Jujuba seeds activated carbon was a spontaneous process The maximum adsorption efficiency of phenol and 2-4 dichlorophenol was 142.85 mg.g−1 and 250 mg.g−1, respectively. <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=adsorption" title=" adsorption"> adsorption</a>, <a href="https://publications.waset.org/abstracts/search?q=isotherms" title=" isotherms"> isotherms</a>, <a href="https://publications.waset.org/abstracts/search?q=Jujuba%20seeds" title=" Jujuba seeds"> Jujuba seeds</a>, <a href="https://publications.waset.org/abstracts/search?q=phenols" title=" phenols"> phenols</a>, <a href="https://publications.waset.org/abstracts/search?q=langmuir" title=" langmuir "> langmuir </a> </p> <a href="https://publications.waset.org/abstracts/17568/adsorption-isotherm-kinetic-and-mechanism-studies-of-some-substituted-phenols-from-aqueous-solution-by-jujuba-seeds-activated-carbon" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17568.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">313</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">2</span> Performance Evaluation of a Spouted Bed Bioreactor (SBBR) for the Biodegradation of 2, 4 Dichlorophenol</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Taghreed%20Al-Khalid">Taghreed Al-Khalid</a>, <a href="https://publications.waset.org/abstracts/search?q=Muftah%20El-Naas"> Muftah El-Naas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As an economical and environmentally friendly technology, biological treatment has been shown to be one of the most promising approaches for the removal of numerous types of organic water pollutants such as Chlorophenols, which are hazardous pollutants commonly encountered in wastewater generated by the petroleum and petrochemical industries. This study aimed at evaluating the performance of a spouted bed bioreactor (SBBR) for aerobic biodegradation of 2, 4 dichlorophenol (DCP) by a commercial strain of Pseudomonas putida immobilized in polyvinyl alcohol (PVA) gel particles. The SBBR is characterized by systematic intense mixing, resulting in improvement of the biodegradation rates through reducing the mass transfer limitations. The reactor was evaluated in both batch and continuous mode in order to evaluate its hydrodynamics in terms of stability and response to shock loads. The SBBR was able to maintain a stable operation and recovered quickly to its normal operating mode once the shock load had been removed. In comparison to a packed bed reactor bioreactor, the SBBR proved to be more efficient and more stable, achieving a removal percentage and throughput of 80% and 1414 g/m3day, respectively. In addition, the biodegradation of chlorophenols was mathematically modeled using a dynamic modeling approach in order to assess reaction and mass transfer limitations. The results confirmed the effectiveness of the use of the PVA immobilization technique for the biodegradation of phenols. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodegradation" title="biodegradation">biodegradation</a>, <a href="https://publications.waset.org/abstracts/search?q=2" title=" 2"> 2</a>, <a href="https://publications.waset.org/abstracts/search?q=4%20dichlorophenol" title=" 4 dichlorophenol"> 4 dichlorophenol</a>, <a href="https://publications.waset.org/abstracts/search?q=immobilization" title=" immobilization"> immobilization</a>, <a href="https://publications.waset.org/abstracts/search?q=polyvinyl%20alcohol%20%28PVA%29%20gel" title=" polyvinyl alcohol (PVA) gel"> polyvinyl alcohol (PVA) gel</a> </p> <a href="https://publications.waset.org/abstracts/89606/performance-evaluation-of-a-spouted-bed-bioreactor-sbbr-for-the-biodegradation-of-2-4-dichlorophenol" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89606.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">181</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">1</span> Biodegradation of 2,4-Dichlorophenol by Pseudomonas chlororaphis Strain Isolated from Activated Sludge Sample from a Wastewater Treatment Plant in Durban, South Africa</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Boitumelo%20Setlhare">Boitumelo Setlhare</a>, <a href="https://publications.waset.org/abstracts/search?q=Mduduzi%20P.%20Mokoena"> Mduduzi P. Mokoena</a>, <a href="https://publications.waset.org/abstracts/search?q=Ademola%20O.%20Olaniran"> Ademola O. Olaniran</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Agricultural and industrial activities have led to increasing production of xenobiotics such as 2,4-dichlorophenol (2,4-DCP), a derivative of 2,4-dichlorophenoxyacetic acid (2,4-D), which is a widely used herbicide. Bioremediation offers an efficient, cost-effective and environmentally friendly method for degradation of the compound through the activities of the various microbial enzymes involved in the catabolic pathway. The aim of this study was to isolate and characterize bacterial isolate indigenous to contaminated sites in Durban, South Africa for 2,4-DCP degradation. One bacterium capable of utilizing 2,4-DCP as sole carbon source was isolated using culture enrichment technique and identified as Pseudomonas chlororaphis strain UFB2 via PCR amplification and analysis of 16S rRNA gene sequence. This isolate was able to degrade up to 75.11% of 2,4-DCP in batch cultures within 10 days, with the degradation rate constant of 0.14 mg/l/d. Phylogenetic analysis revealed the relatedness of this bacterial isolate to other Pseudomonas sp. previously characterized for chlorophenol degradation. PCR amplification of the catabolic genes involved in 2,4-DCP degradation revealed the presence of the correct amplicons for phenol hydroxylase (600 bp), catechol 1,2-dioxygenase (214 bp), muconate isomerase (851 bp), cis-dienelactone hydrolase (577 bp), and trans-dienelactone hydrolase (491 bp) genes. Enzyme assays revealed activity as high as 21840 mU/mg, 15630 mU/mg, 2340 mU/mg and 1490 mU/mg obtained for phenol hydroxylase, catechol 1,2-dioxygenase, cis-dienelactone hydroxylase and trans-dienelactone hydroxylase, respectively. The absence of catechol 2,3-dioxygenase gene and the corresponding enzyme in this isolate suggests that the organism followed ortho-pathway for 2,4-DCP degradation. Furthermore, the absence of malaycetate reductase genes showed that the bacterium may not be able to completely mineralize 2,4-DCP. Further studies are required to optimize 2,4-DCP degradation by this isolate as well as to elucidate the mechanism of 2,4-DCP degradation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biodegradation" title="biodegradation">biodegradation</a>, <a href="https://publications.waset.org/abstracts/search?q=catechol%201" title=" catechol 1"> catechol 1</a>, <a href="https://publications.waset.org/abstracts/search?q=2-dioxygenase" title="2-dioxygenase">2-dioxygenase</a>, <a href="https://publications.waset.org/abstracts/search?q=2" title=" 2"> 2</a>, <a href="https://publications.waset.org/abstracts/search?q=4-dichlorophenol" title="4-dichlorophenol">4-dichlorophenol</a>, <a href="https://publications.waset.org/abstracts/search?q=phenol%20hydroxylase" title=" phenol hydroxylase"> phenol hydroxylase</a>, <a href="https://publications.waset.org/abstracts/search?q=Pseudomonas%20chlororaphis" title=" Pseudomonas chlororaphis"> Pseudomonas chlororaphis</a> </p> <a href="https://publications.waset.org/abstracts/61313/biodegradation-of-24-dichlorophenol-by-pseudomonas-chlororaphis-strain-isolated-from-activated-sludge-sample-from-a-wastewater-treatment-plant-in-durban-south-africa" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61313.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">250</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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Search results for: 6- dichlorophenol indophenol