<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/15430" mdate="2012-12-26 00:00:00"> <author>Mousa Bani Baker and Maria Elektorowicz and Adel Hanna and Altayeb Qasem</author> <title>The Influence of Biofuels on the Permeability of SandBentonite Liners</title> <pages>804 - 807</pages> <year>2012</year> <volume>6</volume> <number>12</number> <journal>International Journal of Environmental and Ecological Engineering</journal> <ee>https://publications.waset.org/pdf/15430</ee> <url>https://publications.waset.org/vol/72</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>Liners are made to protect the groundwater table from the infiltration of leachate which normally carries different kinds of toxic materials from landfills. Although these liners are engineered to last for long period of time; unfortunately these liners fail; therefore, toxic materials pass to groundwater. This paper focuses on the changes of the hydraulic conductivity of a sandbentonite liner due to the infiltration of biofuel and ethanol fuel. Series of laboratory tests were conducted in 20cmhigh PVC columns. Several compositions of sandbentonite liners were tested 95 sand 5 bentonite; 90 sand 10 bentonite; and 100 sand (passed mesh 40). The columns were subjected to extreme pressures of 40 kPa, and 100 kPa to evaluate the transport of alternative fuels (biofuel and ethanol fuel). For comparative studies, similar tests were carried out using water. Results showed that hydraulic conductivity increased due to the infiltration of alternative fuels through the liners. Accordingly, the increase in the hydraulic conductivity showed significant dependency on the type of liner mixture and the characteristics of the liquid. The hydraulic conductivity of a liner (subjected to biofuel infiltration) consisting of 5 bentonite 95 sand under pressure of 40 kPa and 100 kPa had increased by one fold. In addition, the hydraulic conductivity of a liner consisting of 10 bentonite 90 sand under pressure of 40 kPa and 100 kPa and infiltrated by biofuel had increased by three folds. On the other hand, the results obtained by water infiltration under 40 kPa showed lower hydraulic conductivities of 1.50&amp;times;105 and 1.37&amp;times;109 cms for 5 bentonite 95 sand, and 10 bentonite 90 sand, respectively. Similarly, under 100 kPa, the hydraulic conductivities were 2.30&amp;times;105 and 1.90&amp;times;109 cms for 5 bentonite 95 sand, and 10 bentonite 90 sand, respectively.</abstract> <index>Open Science Index 72, 2012</index> </article>