College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, China.
Environ Sci Pollut Res Int. 2018 May;25(13):12764-12779. doi: 10.1007/s11356-018-1325-7. Epub 2018 Feb 22.
Based on large-deformation consolidation theory and the advection-dispersion equation of contaminant in saturated porous media, a one-dimensional theoretical model for coupled large-deformation and solute transport through layered finite soil is presented. This model comprehensively takes the effect of soil weight, sorption, and biodegradation into account. Model validation and applications are achieved through case studies of double-layered finite soil, with the transport and transformation process of contaminant being reproduced numerically. It is found that the breakthrough time of contaminant obtained from the linear adsorption solution is greater than the case of the non-linear adsorption solution, which can provide a reference for the design of landfill liner. Simulation results also indicate that relevant factors affect the transport of contaminant in layered soil interdependently; comprehensive study is required to assess the capacity of natural clay barrier for contaminant transportation.
基于大变形固结理论和饱和多孔介质中污染物的对流弥散方程，建立了一个用于描述层状有限土中耦合大变形和溶质运移的一维理论模型。该模型全面考虑了土体重力、吸附和生物降解的影响。通过双层有限土的实例研究，实现了模型验证和应用，数值再现了污染物的输运和转化过程。结果表明，线性吸附解得到的污染物穿透时间大于非线性吸附解的情况，这可为垃圾填埋场衬垫的设计提供参考。模拟结果还表明，相关因素对层状土中污染物运移的影响是相互依存的，需要进行综合研究来评估天然粘土屏障对污染物运移的阻隔能力。
