山西师范大学校园土壤重金属污染状况与评价

Distribution and Evaluation of Heavy Metals of Soils in the Campus of Shanxi Normal University

利用原子吸收光谱法对山西师范大学三个校区内不同功能区表层土壤中的重金属含量进行测试分析,并采用单因子污染指数法和内梅罗污染指数法对其污染状况作出评价.结果表明,校园内土壤重金属Pb、Cr、Zn、Cu、Ni的平均含量分别为21.58 mg/kg、29.56 mg/kg、127.25 mg/kg、52.04 mg/kg、36.84 mg/kg,除Cr外其余均高于山西省土壤环境背景值,表明校园土壤中5种重金属元素都有不同程度的富集.单因子污染指数评价结果表明,仅三校区受到Cu元素的轻微污染,其余为未污染;综合污染指数评价结果表明,三个校区均未污染.

The content of heavy metals in soils of different functional areas in campus of Shanxi Normal University is analysed by atomic absorption spectrometry. The pollution level of heavy metal was assessed by single pollution index and Nemerow index method. The results show that the average concentrations of Pb,Cr,Zn,Cu and Ni are 21.58 mg/kg,29.56 mg/kg,127.25 mg/kg,52.04 mg/kg,36.84 mg/kg, respectively, and they are above the background numbers of Shanxi soils except Cr. The assessment result shows that using single pollution index the third campus is slightly polluted by Cu, while the other two campuses are in little pollution level; Based on the comprehensive contamination index, three campuses are in little level.