有色金属加工产业园周边农田土壤重金属污染调查研究

Investigation and Assessment of Soil Contaminated by Heavy Metals around Non-ferrous Metals Processing Industrial Park

本研究对位于我国中部某省份某市有色金属加工产业园周边农田土壤中重金属的污染特征进行了调查研究,并采用单因子指数法和内梅罗综合污染指数法评价其污染程度。结果表明,土壤中重金属浓度均低于《土壤环境质量标准》(GB15618-1995)二级标准,对植物和环境不构成影响。单因子指数法评价表明,重金属污染程度由大到小的顺序为:As>Cr>Cd>Pb>Hg;内梅罗综合污染指数法评价表明,各采样点位污染情况依次是S3>S7>S4>S5>S2>S6>S1,主要是受产业园所在地区主导风向东风的影响,处于下风向的S3、S7污染最为严重。

This paper investigated the heavy metal pollution characteristics of soil around non-ferrous metals industrial park in a city of a mid-China province. The single factor pollution index and Nemerow integrated pollution index were used to assess the heavy metal pollution of soil. Results showed that the soil heavy mental pollution concentration was below 'Environmental quality standards for soils'(GB15618-1995)class 2 standard,indicating that it had little effects on plants and the environment. According to the single factor pollution index,the pollution degree was As>Cr>Cd>Pb>Hg. According to Nemerow integrated pollution index,the pollution degree was S3>S7>S4>S5>S2>S6>S1. Soils from S3 and S7 had the most serious heavy metal contamination because of the dominant wind of east wind.