Guo Wei, Zhao Ren-Xin, Zhang Jun, Bao Yu-Ying, Wang Hong, Yang Ming, Sun Xiao-Li, Jin Fan
College of Life Science of Inner Mongolia University, Hohhot 010021, China.
Huan Jing Ke Xue. 2011 Oct;32(10):3099-105.
The pollution status and total concentration of soil heavy metals were analyzed around tailing reservoir of Baotou and iron mining of Bayan Obo located in Inner Mongolia grassland ecosystem. Aim of the study is to control soil heavy metal pollution of grassland mining area and provide the basic information. The results indicated that the soils from different directions of the tailing reservoir were contaminated by Pb, Cu, Zn and Mn. According to the single factor pollution index, the pollution degree was Mn > Zn > Pb > Cu. According to Nemerow integrated pollution index, the indexes of the northeast, southeast, southwest, and northwest of the tailing reservoir, were 2.43, 10.2, 1.88, 1.64. Soils from the southeast had the most serious heavy metal contamination because of the dominant wind of northwest. Within 50 m from the edge of tailing reservoir, heavy metal contamination was most serious except Cu. With regard to Bayan Obo iron mining, the single factor pollution index indicated that the soils from the six surveyed regions were contaminated by Pb, Cu, Zn and Mn. The integrated pollution index indicated that the indexes of the six regions, such as the mining area, the dump, outside the dump, outside the urban area, east region of the railway, and west region of the railway, were 14.3, 4.30, 2.69, 3.41, 2.88, and 2.20, respectively. The soil pollution degree of the mining area was the highest. Additionally, the transport of ore resulted in soil heavy metal pollution along railway. In general, soils of the two studied areas had the similar pollution characteristic, and the elements of heavy metal contamination were corresponding with the concentrations of tailings. The health and stabilization of grassland ecosystem are being threatened by soil heavy metals.
对内蒙古草原生态系统中包头尾矿库及白云鄂博铁矿周边土壤重金属污染状况及总量进行了分析。研究目的是控制草原矿区土壤重金属污染并提供基础信息。结果表明，尾矿库不同方向的土壤受到铅、铜、锌和锰的污染。根据单因子污染指数，污染程度为锰＞锌＞铅＞铜。根据内梅罗综合污染指数，尾矿库东北、东南、西南和西北方向的指数分别为2.43、10.2、1.88、1.64。由于西北风的主导作用，东南部土壤重金属污染最为严重。在距尾矿库边缘50米范围内，除铜外重金属污染最为严重。对于白云鄂博铁矿，单因子污染指数表明，所调查的六个区域的土壤受到铅、铜、锌和锰的污染。综合污染指数表明，矿区、排土场、排土场外部、市区外部、铁路东部区域和铁路西部区域等六个区域的指数分别为14.3、4.30、2.69、3.41、2.88和2.20。矿区土壤污染程度最高。此外，矿石运输导致铁路沿线土壤重金属污染。总体而言，两个研究区域的土壤具有相似的污染特征，重金属污染元素与尾矿浓度相对应。草原生态系统的健康与稳定正受到土壤重金属的威胁。
