某金矿区浅层地下水重金属及氰化物污染评价  

Evaluation of heavy metal and cyanide pollution of the shallow groundwater in a gold mining area

作　　者：乔冈[1] 徐友宁[1] 陈华清[1] 张江华[1] 刘瑞平[1] 

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《地质通报》2015年第11期2031-2036,共6页Geological Bulletin of China

基　　金：国土资源部行业科研专项(编号:20111020;200811061);国土资源部陕西潼关金矿区地质环境野外科学观测基地及国土资源部黄土地质灾害重点实验室项目;中国地质调查局项目(编号:1212010741003;1212011220224)

摘　　要：以某金矿区浅层地下水为研究对象,通过分析112件浅层地下水样的Hg、Pb、Cd、Cr^(6+)、As、Cu、Zn、CN^-等重金属元素及氰化物的含量特征,初步查明了这8种元素在地下水中的赋存规律。在此基础上,分别利用单项、综合污染指数评价方法对浅层地下水环境质量进行了重金属及氰化物污染评价。结果表明,浅层地下水中除背景元素Cr^(6+)局部区域超标外,受矿业选冶活动影响,双桥河流域中下游段局部区域Hg、Pb、CN^-等元素超标,该结论对浅层地下水资源污染防治具有重要意义。The shallow groundwater in a gold mining area was taken as the research object and elements in 112 water samples were collected and analyzed, including Hg, Pb, Cd, Cr6＋, As, Cu, Zn and CN-. The characteristics of heavy metal and cyanide element concentrations in the shallow groundwater were analyzed, and the storage law of heavy metal and cyanide element concentrations in shallow groundwater were preliminarily ascertained. On such a basis, the environmental quality related to heavy metal and cyanide pollution in the shallow groundwater was assessed by using the method of monomial and composite pollution index. The results indicated that the heavy metal and cyanide pollution of the shallow groundwater in a gold mining area was on the whole within the standard except for the elements Cr6＋and Hg, Pb, CN-in the local area. The element Cr6＋was inherent and the elements Hg, Pb, CN-in the shallow groundwater were influenced by the mining activities of industries in the lower reaches of the Shuangqiao River valley.The results obtained by the authors are important for the prevention and treatment of the shallow groundwater resources.

关 键 词：地下水 重金属 污染 评价 金矿区 

分 类 号：X142[环境科学与工程—环境科学]