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Influence of leachate percolation on two bentonitic mixtures
Arabian Journal of Geosciences Pub Date : 2021-01-21 , DOI: 10.1007/s12517-020-06411-6
Seda Durukan , Ender Başarı

This study investigates the response of leachate percolation in sand-bentonite and zeolite-bentonite mixtures for use of a liner. For this purpose, leachate sample was collected from Manisa Uzunburun landfill site, and flexible wall hydraulic conductivity tests were performed on these binary mixtures. During the study, the characterization of the leachate was done, pH and electrical conductivity values were measured, and chemical change in inlet and outlet samples was determined for varying pore volumes of flow. The hydraulic conductivity values were determined as 3 × 10−10 m/s and 7 × 10−11 m/s for sand-bentonite and zeolite-bentonite mixtures, respectively. The Ca+2 element showed a decrease in the outlet samples of sand-bentonite mixture test where an increase in zeolite-bentonite mixture outlet samples were measured showing that Ca+2 element was taken by sand-bentonite mixture and released by zeolite-bentonite mixture. Regarding the preliminary results, sand-bentonite mixture was found to be more successful to uptake Ca, Mg, Fe, and Mn where zeolite-bentonite mixture was more successful to uptake Ba, Ti, Cr, As, S, and Na when the permeant was Manisa Uzunburun leachate. Both soil mixtures hydraulic conductivities were found to be low enough to act as a liner; however, zeolite-bentonite mixture was found to be more successful when regarding the hydraulic conductivity and chemical stability.



中文翻译:

渗滤液渗滤对两种膨润土混合物的影响

这项研究调查了在使用衬里的砂-膨润土和沸石-膨润土混合物中渗滤液渗滤的响应。为此,从Manisa Uzunburun垃圾填埋场收集了渗滤液样品,并对这些二元混合物进行了柔性壁水力传导率测试。在研究过程中,对渗滤液进行了表征,测量了pH和电导率值,并确定了进样和出样的化学变化以适应不同的孔流量。对于沙-膨润土和沸石-膨润土混合物,水导率值分别确定为3×10 -10 m / s和7×10 -11 m / s。钙+2元素表明砂-膨润土混合物出口样品减少,其中沸石-膨润土混合物出口样品增加,表明Ca +2元素由砂-膨润土混合物吸收并由沸石-膨润土混合物释放。关于初步结果,发现砂-膨润土混合物更成功地吸收Ca,Mg,Fe和Mn,而沸石-膨润土混合物更容易吸收Ba,Ti,Cr,As,S和Na。是Manisa Uzunburun渗滤液。发现两种土壤混合物的水力传导率都低到足以充当衬里。然而,从水力传导率和化学稳定性的角度来看,发现沸石-膨润土混合物更为成功。

更新日期:2021-01-22
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