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固体废弃物生物降解时污染物运移过程一维数值分析
引用本文:张金利,栾茂田,杨庆.固体废弃物生物降解时污染物运移过程一维数值分析[J].大连理工大学学报,2004,44(6):870-876.
作者姓名:张金利  栾茂田  杨庆
作者单位:大连理工大学,海岸和近海工程国家重点实验室,辽宁,大连,116024;大连理工大学,土木水利学院,岩土工程研究所,辽宁,大连,116024
基金项目:教育部跨世纪优秀人才培养计划研究基金资助项目(教技函[1999]2号).
摘    要:废弃物降解对污染物的运移机理具有十分重要的影响.基于固体废弃物生物降解效应,针对含水层位于地表下某一有限深度的情况,提出了分析固体废弃物填埋场污染物运移过程的一维计算模型.该模型中包含了污染物在饱和土中的对流、弥散和地球化学反应等运移机理.基于变动参数比较计算结果,通过分析表明:在大多数实际情况下,填埋场地下水中污染物浓度于某一时刻达到峰值,之后随时间增长降低.粘土垫层渗透速度及其吸附性是控制污染物运移过程的最重要因素,同时,粘土垫层厚度和含水层渗流速度的影响也不容忽略.

关 键 词:固体废弃物  填埋场  生物降解  污染物运移  污染物浓度  一维  地下水  土垫层  饱和土  粘土
文章编号:1000-8608(2004)06-0870-07

One-dimensional numerical analyses of pollutant migration process in solid waste considering bio-degradation effect of contaminants
ZHANG Jin-li.One-dimensional numerical analyses of pollutant migration process in solid waste considering bio-degradation effect of contaminants[J].Journal of Dalian University of Technology,2004,44(6):870-876.
Authors:ZHANG Jin-li
Institution:ZHANG Jin-li~
Abstract:Since it is a very important theme to investigate the mechanism of pollutant migration in solid waste degradation process, a one-dimensional model for the analysis of migration process of pollutants through a clay liner below which there is aquifer at a finite depth is presented. The bio-degradation is taken into consideration. The formulation includes both advection and dispersion transport in the clay liner as well as geochemical reaction. Parametric studies are conducted to examine the effects of all the related factors on pollutant migration. It is shown that for most practical situations the concentration of contaminants within the groundwater beneath landfill will reach a peak value at specific time and will subsequently decrease with time. The most significant factors include the seepage velocity and sorption property of clay liner, while both thickness of clay liner and seepage velocity of aquifer are the secondary important factors and cannot be overlooked in the design of countermeasures against permeability of solid wastes.
Keywords:migration of pollutants  solid wastes  landfill  clay liner  degradation  permeability  sorption
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