北京万庄金矿区土壤重金属分布特征及污染评价
投稿时间:2018-09-26  修订日期:2018-09-26  点此下载全文
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作者单位E-mail
姚世厅 北京市地质矿产勘查开发总公司 13932368226@163.com 
王德利 北京市地质矿产勘查开发总公司  
农冬灵 北京市地质矿产勘查开发总公司  
李玉倩 北京市地质矿产勘查开发总公司  
赵峰华 中国矿业大学北京地球科学与测绘工程学院  
基金项目: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
中文摘要: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0.34 mg/kg,26.85 mg/kg,0.32 mg/kg,68.05 mg/kg,30.87 mg/kg,59.04 ng/g,51.55 mg/kg,89.45 mg/kg和32.07 mg/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1 m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。
中文关键词:万庄金矿区  土壤重金属  分布特征  污染指数及程度
 
Distribution and pollution assessment of soil heavy metalsin Wanzhaung gold mine area in Beijing
Abstract: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 0.34 mg/kg, 26.85 mg/kg, 0.32 mg/kg, 68.05 mg/kg, 30.87 mg/kg, 59.04 mg/kg, 51.55 mg/kg, 89.45 and 32.07 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 indicate the soil has been moderately polluted.
keywords:Wanzhuang mine soil  heavy metals of soil  distribution characteristics  pollution index and degree of pollution
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