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Evaluation of heavy metal contamination and its potential ecological risk to the soil in Donghai Island new area, Zhanjiang

机译：湛江东海岛新区土壤重金属污染及其生态风险的评价

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In order to determine the concentration of heavy metals in the soils of Donghai Island new area, Zhanjiang, and the associated potential ecological risk, 40 soil samples in cultivated land and woodland were obtained and analyzed for Pb, Zn, Cu, Cd and Cr. 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 showed that the soils in the research area were polluted by heavy metals Cd, Zn and Pb, and their concentrations were all above the background values. The soils in cultivated land are characterized by no to moderate pollution and pose a light potential ecological risk. The soils in woodland are characterized by moderate to high pollution and pose a moderate potential ecological risk The relative degree of pollution was in the order of Cd> Zn > Pb >Cu> Cr; and the potential ecological risk was characterized by the order of Cd >Pb >Cu∼Zn >Cr, with the predominant risk factor being Cd. In general, the soils within the woodland pose greater potential ecological risk than those in cultivated land.
机译：为了确定东海岛新区土壤中重金属的浓度，湛江和相关的潜在生态风险，得到了耕地和林地的40种土样品，分析了Pb，Zn，Cu，Cd和Cr。两个指数 - 地质累积指数和潜在的生态风险指数 - 用于评估重金属的污染程度。结果表明，研究区域的土壤受重金属CD，Zn和Pb的污染，它们的浓度全部在背景值之上。耕地中的土壤的特征是不适合中度污染，造成光线潜在的生态风险。林地的土壤以中度至高污染为特征，占据了中度潜在的生态风险，污染的相对程度为CD> Zn> Pb> Cu> Cr;并且潜在的生态风险的特征在于CD> Pb> Cu〜Zn> Cr的顺序，主要的危险因素是Cd。一般而言，林地内的土壤比耕地造成更大的潜在生态风险。

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