万山汞矿区周边土壤重金属污染调查及其风险评价  

The Investigation and Risk Assessment of Heavy Metals Pollution in Soil from Wanshan Mercury Area

作　　者：吴兰艳[1] 姚元勇[1] 唐帮成[1] 闫莉莉[1] 黄继明[1] 

机构地区：[1]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《铜仁学院学报》2017年第6期85-90,共6页Journal of Tongren University

基　　金：铜市科研[(2014)100-4];贵州省教育厅重点项目(黔教合KY字[2014]288)

摘　　要：为进一步摸清万山汞矿区土壤受重金属污染程度,对万山镇、下溪乡、敖寨乡、黄道乡、高楼坪乡和瓦屋乡6个采样区域土壤中的Hg、Cd、Pb、Ni、Cu、Zn和Cr 7个重金属含量进行了分析,采用Hakanson潜在风险指数法和单项污染指数法对重金属综合污染效应进行了评价。结果表明:6个采样区的土壤中7种重金属含量均高于"中国土壤元素背景值",且潜在危害指数最大的为Hg;单项污染指数评价表明Hg的超标倍数为23.37~752.90之间;黄西受Hg"轻微污染",白五长和普前受Hg"轻度污染",长敖和大坪村受Hg"中度污染",大水溪尾矿上游、张家湾、宝溪受Hg"重度污染"。In order to further investigate the degree of soil heavy metal pollution from Wanshan Hg mine area, the contents of Hg, Cd, Pb, Ni, Cu, Zn and Cr in six sampling areas, such as Wanshan town, Xiaxi, Aozhai, Huangdao,Gaolouping,and Wawu, were analyzed. The pollution effects of heavy metals in soil samples were evaluated by using single factor index method and Hakanson ecological risk index method. The results showed that the sequence of the seven heavy metals' toxic indexes was Hg> Cd> Pb> Ni> Cu> Zn> Cr. According to the single contamination index, Hg contamination grades of the six sampling areas was ranged from 23.37 to752.90. The single contamination indexes showed that mercury contamination on sampling area of Huangxi was slightly contaminated, Baiwuchang and Puqian contaminated with mild, Changao and Daping contaminated with moderate, Dashuixi, Zhangjiawan and Baoxi contaminated with severe.

关 键 词：万山汞矿区 重金属污染 风险评价 

分 类 号：X820.4[环境科学与工程—环境工程] X53