TY - JOUR ID - 68184 TI - Evaluating the improved hydraulic conductivity of double layer liners by bentonite and DCP JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - Gerashi, Masoud AU - Falamaki, Amin AU - Eskandari, Mahnaz AU - Homaee, Mehdi AD - Former M.Sc. Student, Department of Civil Engineering, Payame Noor University, Tehran, Iran AD - Associated Professor, Department of Engineering, Department of Civil Engineering, Payame Noor University, Tehran, Iran AD - Research Assistant Professor, Soil and Water Research Institute, Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran AD - Professor, Department of Irrigation and Drainage, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran Y1 - 2018 PY - 2018 VL - 49 IS - 5 SP - 965 EP - 975 KW - Hydraulic conductivity KW - landfill liner KW - natural materials DO - 10.22059/ijswr.2018.225261.667614 N2 - Soil and groundwater contamination due to leachate from municipal solid waste landfills is one of the most important environmental challenges for management of soil and water resources. This study was aimed to propose a landfill liner from the existing natural materials that in addition of having proper permeability, provides more capacity to absorb leachates. Two natural amendments including bentonite and DCP were applied to coarse landfill soil of Evaz city in Fars province between zero to a maximum 9% and 0.2% of base materials dry weight, respectively. The required permeability tests were conducted with both water and synthetic leachate. Results indicated that for the materials containing 6% bentonite, application of 0.2% DCP was considerably reduced the permeability compares to the bentonite application. Due to larger viscosity, the permeability of synthetic leachate in base liner materials and containing 3% bentonite, was less than the water. However, in the 6% bentonite application, due to its acidity, the permeability of leachate was increased. In 9% bentonite, synthetic leachate had minor effect in reducing or increasing the soil permeability. This can be attributed to significant increase of fine particles and the increase of soil buffering properties. UR - https://ijswr.ut.ac.ir/article_68184.html L1 - https://ijswr.ut.ac.ir/article_68184_3b7610445d6c599b1e717367100d23e9.pdf ER -