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首页> 外文期刊>Journal of Residuals Science & Technology >A Three-Dimensional Model Coupled MechanicalConsolidation and Contaminant Transport
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A Three-Dimensional Model Coupled MechanicalConsolidation and Contaminant Transport

机译：机械固结与污染物传输耦合的三维模型

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Contaminant transport is a common process for a waste disposal site,which is a practical concern in geo-environmental field. It is essential to study the contaminanttransport behavior in impermeable clay liner. Considering the anisotropy ofa clay barrier in permeability, a three-dimensional model coupled mechanical consolidationand contaminant transport is developed for simulation of contaminant transportthrough a deforming porous medium. This is based on the combination of Biot's theoryand the theory of contaminant transport. Meanwhile, porosity is viewed as a couplingparameter. The influence of soil consolidation deformation and permeability anisotropyon contaminant transport can thus be determined reasonably. Transport equationsare solved by using the finite-element software COMSOL Multiphysics. A parametricstudy has moreover been conducted to understand the influence of contaminant sourcetypes and adsorption modes, including constant contaminated source, attenuation contaminatedsource, linear adsorption, Freundlich adsorption, Langmuir adsorption. Thesimulation results indicate that the permeability anisotropy has a negligible effect oncontaminant transport, adsorption modes have a significant impact on transport depthand range, and the concentration distribution of contaminant with different contaminatedsource types have showed a marked difference.
机译：污染物运输是废物处理场所的常见过程，这是地球环境领域的一个实际问题。研究不渗透性粘土衬里中污染物的迁移行为至关重要。考虑到黏土屏障在渗透率方面的各向异性，建立了一个三维模型，将机械固结和污染物迁移耦合起来，用于模拟污染物在变形的多孔介质中的迁移。这是基于毕奥特理论和污染物迁移理论的结合。同时，孔隙率被视为耦合参数。因此，可以合理确定土壤固结变形和渗透率各向异性污染物迁移的影响。输运方程通过使用有限元软件COMSOL Multiphysics求解。此外，进行了参数研究以了解污染物源类型和吸附模式的影响，包括恒定污染源，衰减污染源，线性吸附，弗氏吸附，朗缪尔吸附。模拟结果表明，渗透率各向异性对污染物的运移影响可忽略不计，吸附方式对运移深度和运移范围有显着影响，不同污染源类型的污染物浓度分布差异显着。

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