Analytical solutions for diffusion of organic contaminant through composite liner considering degradation in leachate and soil liner
Analytical solutions for diffusion of organic contaminant through composite liner considering degradation in leachate and soil liner
复制标题
考虑渗滤液和土壤衬垫降解的有机污染物通过复合衬垫扩散的分析解决方案
DOI：
10.1504/ijep.2017.10006767
复制
发表时间：
2017-08
影响因子：
0.7
通讯作者：
He Jun
中科院分区：
文献类型：
--
作者：
Wu Xun;Shi Jianyong;He Jun
本文给出了分析有机污染物在复合材料衬里中扩散的解析解。该模型同时考虑了渗滤液和土壤衬里中有机污染物的降解。通过与数值方法的比较，验证了所提出的解析解的有效性和准确性。利用所提出的零浓度和零质量通量边界条件，分别计算了复合材料衬板底部有机污染物的质量通量和浓度。随着渗滤液和土壤衬里中污染物半衰期的减小，复合衬垫底部的计算质量通量和浓度也随之减小。参数研究表明，增加土壤衬里的厚度或吸附能力是改善复合衬垫性能的有效方法。该解可用于复合材料衬垫的初步设计和复杂数值方法的验证。
Analytical solutions for analysing organic contaminant diffusion through a composite liner are presented in this paper. The degradation of organic contaminants in leachate and soil liner are both taken into account. The validity and accuracy of the proposed analytical solutions are verified by comparing with a numerical method. The mass flux and concentration of organic contaminants are calculated by the proposed solutions for zeroconcentration and zero-mass flux boundary condition at the base of composite liner, respectively. The calculated mass flux and concentration at the base of the composite liner decrease with the decrease of contaminant half-life in leachate and soil liner. It can be concluded from parametric studies that increasing the thickness or sorption capacity of the soil liner is effective to improve the performance of composite liner. The solutions can be used for preliminary design of composite liners, and verification of complicated numerical methods.