中文摘要：

针对内蒙古达茂旗萤石矿开采导致的矿区土壤污染问题,选择采矿场、采石场、排土场、尾矿场内外和矿区周边草场等典型场地作为研究样地,采集土壤样品并测定Cd、Hg、As、Cu、Pb、Cr、Zn和Ni这8种重金属含量.利用土壤污染因子、内梅罗指数、土壤污染负荷指数和潜在生态风险指数对土壤污染程度进行分析和评价.结果表明,达茂旗矿区各场地土壤中Cu、Cd、Zn和As均不同程度地超过GB 15618—1995《土壤环境质量标准》3级标准.单一元素污染程度以Cd最严重,在各类场地中分布最广.主要的污染风险集中在尾矿场内外和排土场附近,以Cd、As和Hg最突出,其中尾矿场属于重点防控区.整体而言,达茂旗萤石矿区土壤污染范围相对集中,对周边居民活动区影响较小.

英文摘要：

The exploitation of fluorite mines has triggered a serous soil pollution problem in Damao County, Inner Mogolia. Soil samples were collected from mining areas, quarries, earth dumping sites, inside and outside of gangue dumping sites and pastures around the mining areas in the region for analysis of Pb, Cr, Ni, Cu, Cd, Zn, As, and Hg. Heavy metal pollution degrees of the soils were analyzed and assessed based on soil pollution factor, Nemero index, soil pollution load index, and potential ecological risk index. Results show that the soils in all these places have gone beyond the Grade Ⅲcriteria of the Standard of Soil Environmental Quality （ GB 15618-1995） , in pollution of Cu, Cd, Zn, and As. In terms of single-factor pollution, Cd is the most serious and the most extensively distributed one. Pollution risks exist mainly inside the gangue dumping sites and in areas around the gangue and earth dumping sites, with Cd, As and Hg being the major pollutants. The gangue dumpling sites are the priority areas for pollution prevention and control. As a whole, soil pollution is relatively concentrated in the mining areas, and does not have much influence on people in the living quarters.