宿州市朱仙庄矿采煤区土壤重金属污染特征研究

Characteristics of Soil Heavy Metal Pollution in Zhuxianzhuang Mining Area in Suzhou City

选取朱仙庄矿采煤区为研究对象,研究采煤区土壤重金属的污染特征。通过对研究区内58个采样点采样检测显示,朱仙庄采煤区土壤中的Cr、Zn、As和Pb 4种元素重金属的含量值变异系数(CV)排列顺序为Cr>Zn>As>Pb,其中Cr、Zn的CV均大于30%,为强变异水平,空间分布态势差异显著,表明表层土壤中重金属来源受外界因素干扰较大。采用单因子污染指数法和内梅罗污染指数法对参评因子综合评价均显示研究区处于轻度污染水平,表明采煤及相应活动对土壤重金属污染影响显著,必需加强监管,防止重金属污染加剧。

In this study, the Zhuxianzhuang mining area was selected to investigate the characteristics ofheavy metal pollution in the soil. In the study area, 58 sampling points were monitored. The results showed thatthe variation coefficients of Cr, Zn, As and Pb concentrations were ordered in： Cr 〉 Zn 〉 As 〉 Pb, and the CV ofCr and Zn were more than 30% , belonging the strong variation level. The result indicated that the source ofheavy metals in topsoil was obviously affected by environmental factors. The comprehensive evaluation results byboth the single -factor pollution index and the Nemero index revealed that the study area fell in slightly -pollu-ted level, which showed that coal mining activities significantly contributed to the soil heavy metal pollution. Sothe government should enhance the management of this mining area to prevent the heavy metal pollution.