某硫铁矿场地土壤重金属污染特征及健康风险评估

为研究某硫铁矿场地土壤重金属污染特征，评估场地内重金属污染对人体健康的潜在风险，采用单因子污染指数法和多因子综合污染指数法对场地污染程度进行了评价，利用主成分分析和相关性分析对污染物来源进行了解析，并对超标污染物进行健康风险评估。结果表明：场地内As、Hg、Pb和Cr6+存在不同程度的超标，表层土壤为中度污染，深层土壤为轻度污染；超标污染物As、Pb主要来源于原料硫铁矿，Hg和Cr6+为外来带入型污染；场地内As、Pb、Cr6+、Hg健康风险均超出了可接受风险水平，对场地内企业职工的健康可产生一定威胁。

Pollution characteristics and health risk assessment of heavy metal in the soil of a pyrite mine field

To study the characteristics of heavy metal pollution in the soil of a pyrite mine site and evaluate the potential risk of heavy metal pollution to human health, the pollution degree of the site was evaluated by a single factor pollution index and multi-factor comprehensive pollution index, the sources of pollutants were analyzed by principal component analysis and correlation analysis, and health risk assessment on excessive pollutants was conducted. The results showed that As, Hg, Pb, and Cr6+in the site exceeded the standard to different degrees, the surface soil was moderately polluted and the deep soil was slightly polluted. Excessive pollutants As and Pb were mainly from pyrite, while Hg and Cr6+ were imported pollution. Health risks of As, Pb, Cr6+and Hg in the site all exceeded the acceptable risk level, which has posed a threat to the health of employees of the enterprises on the site.