北方某城市浅层地下水中有机污染物迁移转化的数值模拟研究

Numerical modeling of transport of organic pollutants in shallow groundwater in a certain city of northern China

在3次野外取水样分析的基础上,分析了研究区域有机污染特征,并根据室内实验和国内外文献资料所获取的参数,利用地下水模拟系统软件(GMS)对研究区三氯乙烯(TCE)和四氯乙烯(PCE)在地下水中的运移转化进行数值模拟研究,模拟结果表明:研究区地下水中TCE和PCE存在生物降解作用,但是反应速率很小,这表明在相当长的时间内,其浓度仍可能保持在相当的水平上。

The characteristics of regional organic pollutants are analyzed on the basis of three field analyses of water samples, and numerical modeling of transport of TCE and PCE in groundwater of the study area using GMS and the parameters obtained from indoor experiments and domestic and foreign references. The results of modeling indicate that biodegradation exists in groundwater of the area, but the rate of reaction is very low. This suggests that the concentrations of TCE and PCE are probably maintained at a fairly high level for a very long period of time.