Analytical solution for 1D advection-diffusion-adsorption transport of landfill contaminants through a soil layer with finite thickness

作者：Zhang Wen Jie^*; Huang Yi Yi; Zhang Gai Ge

来源：Chinese Journal of Geotechnical Engineering, 2013, 35(7): 1197-1201.

• Advection-diffusion-adsorption
• Break through curve
• Breakthrough
• CCL
• Groundwater contamination
• Groundwater drainage
• Parametric -analysis
• Zero concentration

Performance of liner systems is very important to prevent groundwater contamination by landfills. In accordance with the case that groundwater drainage layers are built beneath the liner systems in sanitary landfills, a 1D analytical model for advection-diffusion-adsorption process of contaminants through a soil layer with finite thickness is proposed. Cauchy boundary is adopted to simulate the mass migration to a zero concentration circumstance. The results show that the analytical solution coincides well with that of a commercial numerical software. The analytical solution is reasonable and accurate. Parametric analyses show that adsorption, diffusion and advection all have great influence on the breakthrough curves. To improve the performance of clayey liners, the soil layer with high adsorption ability is suggested, and leachate head need to be strictly controlled.

• 出版日期2013
• 单位上海大学