矿区复垦土壤环境质量剖面变化特征研究——以平朔露天矿区为例

为揭示矿区复垦基质的主要污染元素剖面变化特征,给矿区土地复垦与生态重建提供科学依据,以山西平朔露天矿区为例,采用野外试验与室内分析相结合的方法,依据中国绿色食品发展中心发布的《绿色食品产地环境质量现状评价技术导则》(2001-02-10实施),采用单项污染指数和综合污染指数法,对矿区不同复垦基质的主要污染元素(Cd、Hg、As、Pb、Cr、Cu)剖面变化进行了分析与评价,结果表明:(1)在所选的10个典型地段61个样点中,Cd、Hg、As、Pb、Cu的单项污染指数和综合污染指数均未超过绿色食品产地土壤环境质量标准;Cr的单项污染指数超标的有6个样品;(2)同一污染元素在不同剖面中变化特征都不同,整体来看,Cr、Pb含量在复垦土壤剖面变化较大,其次是Cd、As,含量变化较小的是Hg和Cu。

Research on Change Characteristic of Environmental Quantity in Reclaimed Soil Profile in Mine Area--Taking Pingshuo Opencast Mine as a Example

In order to open out the profile change characteristic of main pollution element of mine reclaimed soil;provide scientific bases for land reclamation and ecological reconstruction.The paper takes Shanxi Pingshuo Opencast Mine as a example,adopting the means that field experimentation combine with lab analysis,according to green food technical guideline for the assessment of the area's environment quality condition issued by Green Food Developing Center of China,adopting the means of single pollution index and integrate pollution index,have an evaluation and analysis to the profile change of main pollution element of different reclaimed soil,the result indicate:(1) In the 10 typical sections,61 sampling spaces,the single and integrate pollution index of Cd,Hg,As,Pb,Cu do not exceed the standard of the area's environment quality of green food;there are 6 sampling space that single pollution index of Cr exceed the standard;(2) The change characteristic of the same pollution element in different profile is all different,in the whole,the content of Cr,Pb in reclaimed soil profile change greatest,the next is Cd,As.The content of Hg,Cu is smaller.