太原市土壤重金属污染及其潜在生态风险评价

为全面了解太原市土壤重金属含量及其潜在生态危害程度,在研究区内共采集了80个土壤样品,测试了Pb、Cu、Ni、As、Cd、Cr、Hg、Zn共8种重金属元素含量,并采用地积累指数法和潜在生态危害指数法对土壤重金属污染进行了分析和评价.结果表明,太原市土壤环境总体污染程度处于无-中度污染,潜在生态危害处于轻微危害程度.相对...

Evaluation of heavy metal contamination and its potential ecological risk to the soil in Taiyuan, China

In order to determine the concentration of heavy metals in the soils of Taiyuan, China, and the associated potential ecological risk, 80 soil samples were obtained and analyzed for Pb, Cu, Ni, As, Cd, Cr, Hg and Zn. Two indices-the Index of Geoaccumulation and the Potential Ecological Risk Index-were used to evaluate the degree of pollution by heavy metals. The results indicated that the soils in study area are characterized by no-to-moderate pollution and pose a light potential ecological risk. The relative degree of pollution was in the order of Cd>Hg>Zn>Pb=Cu>Ni>As>Cr. Likewise, the potential ecological risk was characterized by the order of Hg>Cd>As>Pb=Cu>Cr>Zn, with the predominant risk factor being Hg. Comparatively speaking, the soils within the urban areas pose the greatest potential ecological risk, followed by those in rural areas. The excess of these eight elements in soils primarily results from transportation, coal combustion, fertilization, and irrigation with sewage.