长江经济带矿山土壤重金属污染及健康风险评价

研究长江经济带矿山土壤重金属污染状况，是推动长江经济带矿山生态修复和绿色矿山建设的重要前提.通过搜集2006～2020年间长江经济带矿山土壤重金属污染相关研究，并对搜集文献采样数据运用地累积指数法、克里金插值法和健康风险评价法对重金属的污染状况、分布规律和健康风险进行研究.结果表明，长江经济带矿山土壤中Pb、 Cd、 Cr、 Hg、 As、 Zn、 Ni和Cu含量平均值超我国长江经济带土壤背景值，Cd和Hg累积程度显著；污染评价结果显示8种重金属污染程度大小为：Cd>Hg>Pb>Zn>Cu>As>Ni>Cr, Cd和Hg污染程度最高，存在超60%的样本点处于中污染以上；污染评价显示锡矿和铅锌矿土壤污染较其他矿种明显突出；健康风险评估显示经口摄入为非致癌和致癌风险的主要摄入途径，总非致癌和致癌风险指数均处于不可接受范围内，且长江经济带中上游各省市矿山土壤的非致癌和致癌风险明显高于下游.

Heavy Metal Pollution and Health Risk Assessment of Mine Soil in Yangtze River Economic Belt

The study of heavy metal pollution in mine soil of the Yangtze River Economic Belt is important for promoting the ecological restoration of mines and the construction of green mines in the Yangtze River Economic Belt. For this study, we collected the relevant research on the pollution of heavy metals in the mine soil of the Yangtze River Economic Belt from 2006 to 2020 and studied the pollution status, distribution law, and health risk of heavy metals by using the land accumulation index method, Kriging interpolation method, and health risk assessment method. The results showed that the average contents of Pb, Cd, Cr, Hg, As, Zn, Ni, and Cu in mine soil far exceeded the background value in China, and the accumulation degree of Cd and Hg was significant. The pollution evaluation results showed that the pollution degree of the eight heavy metals was Cd>Hg>Pb>Zn>Cu>As>Ni>Cr, the pollution degree of Cd and Hg was the highest, and more than 60% of the sample points were at medium pollution. The pollution evaluation showed that the soil pollution of tin and lead-zinc mines was more prominent than that of other minerals. The health risk assessment indicated that oral intake was the main intake route for non-carcinogenic and carcinogenic risks, the total non-carcinogenic and carcinogenic risk index was within the unacceptable range, and the non-carcinogenic and carcinogenic risk of mine soil in the middle and upper reaches of the Yangtze River Economic Belt was significantly higher than that in the lower reaches.