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以铬渣堆场周边土壤为研究对象,分层分区采集土壤样品,采用地累积指数、潜在生态风险指数法和人体健康风险评价模型,对土壤中Cr(VI)、Cr、Pb、As等重金属进行风险评估。结果表明,土壤中Cr(VI)、Cr、Pb、As含量的平均值分别为567.19、9 055.61、457.19、66.80mg/kg。研究区土壤均处于中度偏强的生态风险等级,且铬污染受人为污染影响严重。研究区土壤中的Cr(VI)和As存在致癌风险,主要是经手—口摄入途径暴露所致。研究区土壤的非致癌风险非常严重,且主要贡献来源于铬元素。
Abstract：Risk assessment of heavy metals of Cr(Ⅵ),Cr,Pb,and As in surrounding soil of chromium slag stock dump was conducted by index of geoaccumulation,potential ecological risk index and human health risk assessment model applying surrounding soils of chromium slag stock dump as research object.The results show that average content of Cr(Ⅵ),Cr,Pb,and As in soil is 567.19,9 055.61,457.19 and 66.80 mg/kg respectively.The ecological risk level of the studied area is beyond medium danger,and pollution of Cr largely comes from human activities.Carcinogenic risk of Cr(Ⅵ) and As in the studied soil mainly comes from exposed contact and eating.No carcinogenic risk of the studied area is extremely serious,which mainly coms from Cr.
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基本信息:
中图分类号:X53;X825
引用信息:
[1]王兵.铬渣堆场周边土壤中重金属污染及风险评估[J].有色金属(冶炼部分),2018(04):81-86.
基金信息:
国家高技术研究发展计划项目(2012AA06A202); 湖南省科技重大专项(2014FJ1011)
2018-04-12
2018-04-12