矿业城市不同功能区表层土壤中微量元素分布特征研究--以安徽省淮南市为例

摘要

Taking Tianjia'an and Datong district of Huainan city of Anhui province as an example,collect⁃ing the city’s surface soil samples of different function areas,and determinating of pH value,salt content, as well as the content of 5 trace elements-Hg,As,Pb,Cr and Cd,studing the trace elements in the mining city of different functional area’s distribution character and pollution of the present situation of layer in the soil. The results show that:the regional soil shows generally weak acidic soil,part of trace elements in has been shown to influence from mining activities,and it is cumulative;In the five functional areas,the content of five trace elements in soil from high to low are Cr,Pb,As,Cd,Hg The As,Pb and Cr contents of three elements in the Nemero index are greater than 3,belonging to heavily polluted,while the Hg and Cd of the Nemero index is less than 0.7,which belongs to the cleaning.%以安徽省淮南市田家庵区和大通区为例，采集不同功能区城市表层土壤样品，测定其pH值、可溶性盐含量，以及Hg、As、Pb、Cr、Cd等5种微量元素的含量，研究微量元素在矿业城市不同功能区表层土壤中的分布特征与污染现状。结果表明：研究区域土壤总体上呈弱酸性，并具有累积性；在5个功能区中，土壤中5种微量元素含量由高到低依次为Cr、Pb、As、Cd、Hg，其中，As、Pb、Cr3种元素含量的内梅罗指数远远大于3，均属重度污染，而Hg、Cd的内梅罗指数小于0.7，属清洁。