某尾矿堆积区土壤重金属分析与评价  

Analysis and evaluation of heavy metals in soil near the tailings site

作　　者：孙韵[1] 谢娟[1] 杨育娟[1] 田恬[1] 易秀[1] 孙亚乔[1] 张江华[2] 徐友宁[2] 

机构地区：[1]长安大学环境科学与工程学院 [2]中国地质调查局西安地质调查中心

出　　处：《黄金》2014年第1期68-70,共3页Gold

基　　金：国家自然科学基金(41372258);国土资源部(201111020);中国地质调查局(1212011140024)

摘　　要：通过对某尾矿堆积区进行环境调查，采集了附近土壤样品，分析了重金属含量，应用地质累积指数对其进行了评价。评价结果表明：汞的地质累积指数为0．97～6．27，57．14％采样点的污染级别为Ⅳ级，属于强污染；铅的地质累积指数为-0．03～4．74，平均指数为1．77，71．43％采样点的污染级别达到Ⅱ级，属中度污染；镉的地质累积指数为0．39～4．90，80．95％采样点的污染级别达到Ⅱ级，属中度污染；铬、砷几乎没有污染；铜、锌的地质累积指数平均值为0〈Igeo〈1，污染级别为Ⅰ级，属于无污染到中度污染；汞的污染最为严重。The accumulation of railings has a certain effect on the surrounding environment. Through environmen- tal investigation on the accumulation area of tailings, samples of near soil are collected, the content of heavy metal is analyzed and the effect was assessed by geo-accumulation index. The results showed that： geo-accumulation index of Hg was 0.97 -6.27, and 57.14 % sampling sites had exceeded Grade 4 pollution, equivalent to strong pollution; The geo-accumulation index of Pb was -0.03 -4.74, average value 1.77 ,and 71.43 % sampling sites reached Grade 2, equivalent to moderate pollution ; Geo-accumulation index of Cd was 0.39 - 4.90,and the grade of geo-accumulation index reached Grade 2,equivalent to moderate pollution for 80.95 % of sampling sites; The soil was almost not pollu- ted by Cr and As. The mean geo-accumulation index of Cu and Zn was between 0 and 1 ,and its pollution was Grade 1, which belonged to the unpolluted to moderately polluted. The pollution level of Hg was most serious.

关 键 词：尾矿 土壤 重金属污染 分析与评价 

分 类 号：TD926.4[矿业工程—选矿] X825[环境科学与工程—环境工程]