钒钛磁铁矿尾矿库周边农用土壤重金属污染诊断  

Diagnoses of Heavy Metal Pollution in Agricultural Soil Around a Tailing Pond of Vanadium Titanomagnetite

作　　者：杜波 DU Bo(Sichuan Laoyan Science & Technology Co.,Ltd,Panzhihua,Sichuan 617000,China)

机构地区：[1]四川劳研科技有限公司,四川攀枝花617000

出　　处：《四川环境》2020年第5期113-118,共6页Sichuan Environment

摘　　要：通过对钒钛磁铁矿尾矿库周边农用土壤的采样调查,测定了6种重金属(Cr、Ni、Pb、Cd、Hg、As)的含量,并采用单因子污染指数法、内梅罗综合污染指数法和潜在生态危害指数法探讨了研究区土壤重金属的污染程度。结果表明:研究区土壤中的重金属含量均未超过GB15618-2018风险筛选值,但Cr、Ni、Cd、Hg等重金属平均值高于四川省土壤环境背景值;评价显示土壤中各采样点的重金属单因子污染指数均小于1,内梅罗污染指数均小于0.7,说明各监测区域土壤环境质量处于清洁水平;从潜在生态风险指数评价结果来看,尾矿库周边农用地各重金属潜在生态风险程度强弱顺序为Hg>Cd>As>Ni>Pb>Cr,研究区整体处于中等生态危害。The concentrations of six heavy metals in the soil(Cr,Ni,Pb,Cd,Hg,As)was determined by sampling of agricultural soil around vanadium-titanium magnetite tailings pond,and the pollution levels of heavy metals in research soil in the study area was analyzed by using single factor pollution index method,Nemerow comprehensive pollution index method and potential ecological risk hazard index.Results showed that the content of heavy metals in the soil did not exceed risk screening values of GB15618-2018,but the average values of Cr,Ni,Cd and Hg were higher than the background values of soil environment in Sichuan Province.The evaluation showed that the single factor pollution index of heavy metals in the soil of each sampling point was less than 1,and the Neimero pollution index was less than 0.7,which indicated that the quality of the soil environment in each monitoring area was at a clean level.According to the evaluation results of the potential risk hazard index,the level of risk of heavy metals in the agricultural soil surrounding a tailing pond was in the order of Hg>Cd>As>Ni>Pb>Cr,it showed that the research areas were at medium ecological hazard.

关 键 词：土壤 尾矿库 重金属 污染评价 生态危害 

分 类 号：X53[环境科学与工程—环境工程]