重金属污染物在非均质储层中运移的环境预测模型

根据多孔介质溶质运移理论,建立了煤矸石中淋溶重金属在非均质多孔介质中运移的数学模型,并以淋溶元素Hg为例,采用所建立的数学模型模拟其在非均质多孔介质中的运移过程,预测了污染物的浓度分布范围和发展趋势。模拟结果表明:随着时间的延长,重金属Hg在地下环境中污染的范围逐渐扩大,而在低渗区浓度等值线发生曲折,浓度增长变缓慢。所建立的数值模型可为固体废物场址的选择以及污染的控制提供决策依据。

Environmental Prediction Model of Heavy Metal Contaminant Transport in Heterogeneous Aquifer

Based on the leakage mechanism of heavy metal contaminants , a mathematic model is developed for describing the transportation and transformation of heavy metal contaminants in a heterogeneous aquifer. Taking leaching element Hg as an example, the approach has been used for the simulation of groundwater flow and contaminant transport. It predicts the temporal and spatial distribution features of contaminant concentration. Numerical simulation results show that under certain leakage conditions, the groundwater pollution caused by heavy metal contaminant increase with time, while within the low K zone, the contour of contaminants concentration becomes tend to broken with slow increase of concentration. The present model provides scientific basis for making decision in selecting the disposal site and controling and preventing pollution.