Influence on shallow ground water by heavy metal in polluted river  

作　　者：李志萍 郝仕龙 陈肖刚 沈照理 钟佐粲 

机构地区：[1]School of Resources and Environment, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008, China [2]School of Water Resource and Environmental Engineering, China University of Geosciences, Beijing 100083, China

出　　处：《Journal of Coal Science & Engineering(China)》2007年第1期37-43,共7页煤炭学报（英文版）

摘　　要：The main purpose of the research is to study the influence on shallow ground water by heavy metal in polluted river. In the lab-scale experiment polluted rivers were simulated by domestic sewage, and three kinds of natural sand were chosen as infiltration medium, it was found that Cr（Ⅵ）penetrated on the 13th day and then had a removal ratio of 77%-99% in coarse sand,over 91% and 96% in two kinds of medium sand. From beginning to end in column 2 and column 3 the removal ratio of lead were greater than 97%. It is difficult for Cr（Ⅵ） and lead to enter ground water. In on-site test it indicates that the concentration of Cr（Ⅵ） in No.1-3 and coal yard well along the bank of Liangshui River is not greater than background concentration in groundwater, so Cr （Ⅵ） in Liangshui River has a little influence on ground water. The mechanism of Cr（Ⅵ） removal is reducing action and sedimentation. The removal mechanism of lead primarily is chemical adsorption and generation deposit. Cr（Ⅵ） mainly is transformed to precipitation by reducing action because of abundant reduction agent in the infiltration media, so the tests indicat that polluted river is not the source of Cr （Ⅵ） pollution in ground water. Generally lead may polluted soil, but not groundwater.

关 键 词：polluted river Cr（Ⅵ） PB ground water 

分 类 号：X522[环境科学与工程—环境工程]