南水北调中线焦作典型区浅层地下水污染特征

摘要

Shallow groundwater of typical area in Jiaozuo was studied for species composition,sources and pollution mechanism of contaminants. The achievement could have great significance to guarantee water safety for the middle line of south-to-north water diversion project. The results show that the shallow groundwater is seriously polluted by Cr6+ ,nitrate,sulfate,hardness,TDS and escherichia coli,and that chrome comes from an ash field of a Jiaozuo power plant and nitrate,sulfate,hardness,TDS and escherichia coli are due to industry wastewater as irrigating water. Therefore,we need to take steps to prevent groundwater to be polluted.%南水北调中线焦作典型区浅层地下水污染的研究对确保南水北调工程供水水质安全具有重大的意义.通过现场调查以及水质分析,结果表明:研究区浅层地下水六价铬、硝酸盐、硫酸盐、硬度、溶解性总固体(TDS)以及大肠杆菌污染严重.研究区浅层地下水铬污染的污染源是焦作某电厂的灰场,该灰场粉煤灰中含有大量的重金属铬.工矿业污水灌溉农田是浅层地下水硝酸盐、硫酸盐、硬度、TDS以及大肠杆菌污染的主要影响因素.