中国矿区重金属污染现状及生态风险研究

Study on heavy metal contamination and ecological risk in mining areas in China

当前我国矿区重金属污染形势依然严峻,全国各地都积极响应土壤污染防治计划的实施。在此背景下,该研究通过抓取已公开发表的文献数据,运用Meta分析方法进行二次数据开发,整理得到了223个矿区采样点附近土壤浓度及分布状况,通过Arc GIS绘制得到了超标点位分布图,并通过潜在生态风险指数法计算得到了铅(Pb)、镉(Cd)、汞(Hg)、铬(Cr)、砷(As)5种重金属相应造成的生态风险,最终得出结论:南方地区如云南、广西等省份矿区污染更为严重,且总体上镉污染最为严重,需要优先管控。

Currently, the condition of heavy metal contamination in mining areas in China is still severe, all agencies actively re- spond to the implementation of the soil pollution prevention plan throughout the country. Under the circumstance, this review explored database such as CNKI to get 223 examined sites in mining areas. This review mapped the distribution of over-standard points using AreGIS and then calculated ecological risks posed by Lead （ Pb ） , Cadmium （ Cd ） , Mercury （Hg） , Chromium （Cr） and Arsenic （As） using the potential ecological risk index method. Finally, this review concluded that soil Cd pollution in mining areas is the seve- rest and should be controlled prior to other metals.