Fully transient analytical solution for degradable organic contaminant transport through GMB/GCL/AL composite liners |
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Authors: | Shi-Jin Feng Ming-Qing Peng Hong-Xin Chen Zhang-Long Chen |
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Affiliation: | Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Department of Geotechnical Engineering, Tongji University, Shanghai, 200092, China |
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Abstract: | In this study, analytical solution for degradable organic contaminant transport through a composite liner consisting of a geomembrane (GMB) layer, a geosynthetic clay liner (GCL) and an attenuation layer (AL) is derived by the separation of variables method. The transient contaminant transport in the whole composite liner can be well described avoiding some weird phenomena in existing analytical solutions. The results of parametric study show that GCL has significant effect on improving the barrier efficiency especially for scenarios with high leachate head. The biodegradation and adsorption in GCL have significant influence on the contaminant transport through the composite liner when the half-life of contaminant in GCL is less than 5 years. Otherwise, the effect can be neglected. |
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Keywords: | Corresponding author Geosynthetics Biodegradation Advection Diffusion Composite liner Analytical solution |
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