摘要
通过室内实验分析了pH值对煤矸石中微量元素析出的影响，并基于多孔介质流体力学和溶质运移动力学理论建立了定量描述微量元素在土壤水环境系统中迁移的数学模型，通过有限差分方法进行数值离散，分析了不同质地的土壤和降雨强度对微量元素浓度分布的效应。预测了20a内其在地下水中浓度的分布．结果表明：淋溶的时间长短、pH值的大小都会对污染造成影响，pH值对不同微量元素其淋溶量也会有所不同，淋溶时间越长，微量元素的淋溶量会不断地增加．随着时间的增加，微量元素污染的范围将不断扩大．
The effects of pH value on coal mine spoil trace elements were analyzed on the basis of column leaching experiments. Based on the porous media fluid mechanics and solute transport theory, the mathematical models were developed for describing the transportation and transformation of the trace elements in groundwater aquifer. Solutions to the coupled model was accomplished by finite difference method. The different texture soil and rain intensities on the concentration distribution of trace elements were analyzed. This model was used to predict the concentration distribution in 20 a. Numerical results show that the leaching time and pH value has large impact on the contaminants transport. Different trace elements are differently affected by pH values of leaching media. The longer of leaching time is, the higher of trace elements concentration. The subsurface pollution range has a trend of increase with time.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2005年第B08期84-88,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目（50374041、50309015）
武汉市青年科技晨光计划资助项目（20055003059-33）
地质灾害防治与地质环境保护国家专业实验室项目（GZ2004-011）.
关键词
煤矸石
耦合模型
微量元素
地下水污染
迁移转化
coal mine spoil
coupled model
trace elements
groundwater pollution
transportation and transformation
