煤矿区土壤环境质量评价

Evaluation of soil environment quality in mining districts

文章选取山西大同矿区和长治矿区,从煤矸石堆放区土壤污染及开采沉陷区土壤养分变化两方面进行了煤矿区土壤环境质量评价,认为煤矸石中污染土壤的主要污染因子有SO42-、Cu、Zn等,其中SO42-污染范围较大,Cu、Zn受环境背景条件影响较大,其它污染因子如NO3-、As、Pb、Cd等均对土壤有不同程度的污染。而开采沉陷对沉陷区土壤中的P、K、N和有机质等养分含量有一定的影响,但影响程度不是很明显。

In this paper, the Datong and Changzhi mining district are chosen as the study area. On the basis of soil pollution around the deposit sites of coal refuse and the soil nutrition in the subsidence areas, the soil environment quality is estimated. The results show that the obvious pollutants are SO4^2- , Cu, Zn, etc. Pollution area of SO4^2- is larger than that of others. The contents of Cu, Zn are affected by environment background. Other pollutants such as NO3^- , As, Pb, Cd, ere, also have different pollutant effect on soil. Exploitation subsidence has some effect on the contents of P, K, N and organic compound around subsidence the area, but the effect is not as obvious as expected.