摘要
土壤重金属通过发生溶解、沉淀、吸附、氧化等物理、化学一系列反应后,最终以多种形态存在于土壤中,在植物体内富集,或转化为毒性更大的甲基化合物。调查了北方尾矿库周边的重金属污染的基本情况,对其表层土壤与植物中重金属Cu、Pb、Zn、Cd的含量进行了测定分析,结果表明,尾矿库周边土壤和植物中重金属含量偏高,趋势比较明显的因子有Pb、Zn、Cd,尾矿库周边土壤中Pb、Cd已达到污染限值且尾矿库周边植物中Pb的含量超过国家标准。植物受到影响进而影响人类的健康问题,利用风险评估技术对重金属进行健康风险评价,筛选污染严重的位点,针对尾矿库的重金属污染严重位点提出了相应的治理建议。
A Survey of heavy metal pollution in one of the mine tailing reservoirs in north China were conducted,which involved the analysis and determination of heavy metals（e.g.,Cu,Pb,Zn and Cd）content in topsoil and plants. Results of the surveys indicated that concentrations of heavy metal,especially Pb,Zn and Cd,in topsoil and plants were comparatively high in the vicinity of the tailing reservoir. Pb concentration in plants exceeded the relevant national standard,while Pb and Cd in topsoil almost reached the limits of the national standard for soil pollution. Plants contaminated by heavy metals thereby would affect human health. So risk assessment technique was used in the heavy metal health risk assessment,with the sites that had been severely polluted being screened out,whereupon the recommendations for heavy metal pollution control were proposed.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2016年第4期144-148,共5页
Environmental Science & Technology
基金
国家环保部公益性行业科研专项项目(201309005)
关键词
尾矿库
重金属
污染
调查
tailing reservoir
heavy metal
contamination
investigation
