中文摘要：

填埋场中垃圾降解作用产生的热量在黏土衬垫中的运移会形成温度场,温度场会对污染物的运移产生影响。文章在多孔介质热力学理论和污染物运移理论相结合的基础上,主要考虑温度场对污染物扩散的影响,建立了非等温条件下有机污染物在黏土衬垫中的一维扩散模型,并采用分离变量法得到了模型的解析解。基于文中模型,对比了非等温条件和等温条件下有机污染物在黏土衬垫中的运移。非等温条件的黏土衬垫底部浓度比等温条件下的浓度大,非等温模型比等温模型更偏于安全。解析解可为实验数据的拟合及分析、衬垫的设计提供参考。进一步的参数分析表明：增大阻滞因子Rd和黏土厚度L可以减小黏土衬垫底部由温度梯度引起的有机污染物浓度。

英文摘要：

Temperature gradient in clay liner is formed in the migration of heat which is generated by waste degradation in landfills. The contaminant migration is induced by temperature gradient. In this paper,a 1-D model for analyzing organic contaminant diffusion through clay liner under the condition of transient temperature is established on the basis of the theory of porous thermodynamics and the transportation theory. The influence by temperature gradient on organic contaminant diffusion is considered in the model. Furthermore,separation of variables is adopted to get the analytical solutions of the model. With this model,the migration of organic contaminants in clay liner under the condition of transient temperature and under the isothermal condition are compared. Concentration at the base of clay liner under the condition of transient temperature is higher than that under the isothermal condition. Thus the model under the condition of transient temperature is safer. The analytic method can be used for evaluating experimental results and design of landfill liners. Increasing the retardation factor and thickness of the clay can reduce contaminant diffusion caused by transient temperature.