北京万庄金矿区土壤重金属分布特征及污染评价  

Distribution and pollution assessment of soil heavy metals in Wanzhaung gold mine area in Beijing

作　　者：姚世厅 李玉倩[1] 王德利[1] 农冬灵[1] 赵峰华[2] YAO Shiting;LI Yuqian;WANG Deli;NONG Dongling;ZHAO Fenghua(Beijing Geological and Mineral Exploration and Development Corporation,Beijing 100050,China;College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]北京市地质矿产勘查开发总公司,北京100050 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《中国矿业》2018年第B10期59-65,共7页China Mining Magazine

基　　金：北京市地质矿产勘查局项目"北京城市地质土壤调查与评价"资助

摘　　要：通过对万庄金矿区表层及垂向土壤的取样调查,分析了矿区土壤中As、Cd、Cr、Cu、Hg、Pb、Zn及Ni的重金属含量、重金属在土壤垂向上的分布特征,采用单因子污染指数、内梅罗综合污染指数及污染负荷指数(PLI)的方法对矿区的污染程度进行评价。结果表明:土壤中As、Cd、Cr、Cu、Hg、Pb、Zn及Ni平均含量分别为26.858mg/kg、0.321mg/kg、68.055mg/kg、30.879mg/kg、59.040ng/g、51.556mg/kg、89.450mg/kg和32.070mg/kg;两个剖面的重金属元素总体自地表向地下含量减少且该趋势主要表现在地表至地下1m处,再向地下则含量趋于稳定;综合污染指数是1.79,说明该区总体上表层土壤处于轻微污染水平;矿区整体的PLI值为1.12,属于中等污染程度。Through investigating surface soil samples in Wanzhuang gold mine area,physiochemical properties of soil,content and vertical distribution characteristics of heavy metal elements including As、Cd、Cr、Cu、Hg、Pb、Zn and Ni were analyzed.And single pollution index,Nemerow pollution index and potential ecological risk index were adopted to evaluate the pollution degree of gold mine area.The results show that the average concentrations of As、Cd、Cr、Cu、Hg、Pb、Zn and Ni are 26.858 mg/kg,0.321 mg/kg,68.055 mg/kg,30.879 mg/kg,59.040 ng/kg,51.556 mg/kg,89.455 mg/kg and 32.070 mg/kg;the content of heavy metals decreases gradually from surface to underground.Among the seven kinds of heavy metals,mainly in the ground to the ground one meter,further to the ground,the content tends to be stable.The comprehensive pollution index is 1.79,it indicates that the surface soil in the area is generally slightly polluted.The overall PLI value of the mining area is 1.12,it indicates the soil has been moderately polluted.

关 键 词：万庄金矿区 土壤重金属 分布特征 污染指数及程度 

分 类 号：X53[环境科学与工程—环境工程]