徐州市北郊工业区浅层地下水重金属污染研究

Pollution Assessment of Heavy Metals in Shallow Groundwater in the Northern Suburb of Xuzhou City

徐州市是我国重工业城市之一,目前徐州市大部分工业、企业分布在北郊。由于各种原因,十几年来北郊工业区重金属污染物的排放量并未减少,通过污水灌溉、地表径流下渗等途径扩散迁移到浅层地下水中的重金属可能已经危及到地下水的安全。以该区为研究对象,根据该区地下水的流向进行了系统采样,对采集到的13个地下水样品中的重金属元素进行了系统分析,以饮用水标准为评价标准,采用单因子法进行了评价。结果表明,Cu、Zn、Hg 3种元素均未造成污染;61%上的样品中Cd元素达到或超过饮用水水质标准上限;Mn的浓度为69%,样品超标;Pb元素污染严重且已影响到整个研究区。

Xuzhou is one of important industrial cities in China.At present,most industries and enterprises are distributed in north suburbs of Xuzhou City.Due to various reasons,the discharge of heavy metals pollutants in north suburbs industrial areas in about ten years has not been decreased still.The heavy metals diffused and moved to shallow groundwater through the approaches of sewage irrigation and surface runoff infiltration might have endangered the safety of groundwater.With this region as the study area,the samples were systematically collected according to the flow direction of groundwater in this region.The heavy metals in 13 collected groundwater samples were systematically analyzed.With the drinking water standards as the evaluation standards,the evaluation was made by using single factor method.The results showed that there was no pollution of Cu,Zn and Hg.Cd in more than 61% samples reached or exceeded the upper limit for the standards of drinking water.Mn concentration in 69% wa...