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首页> 外文期刊>Nature environment and pollution technology >Spatial Distribution, Ecological Risk Assessment and Source Identification for Nutrients and Heavy Metals in Surface Sediments from Tangxun Lake, Wuhan, Central China
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Spatial Distribution, Ecological Risk Assessment and Source Identification for Nutrients and Heavy Metals in Surface Sediments from Tangxun Lake, Wuhan, Central China

机译：武汉市塘x湖表层沉积物中养分和重金属的空间分布，生态风险评估和来源识别

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摘要

The nutrient and heavy metal contents of sediments in the largest urban lake in Wuhan City in China aredetermined through a detailed analysis of the present condition of Tangxun Lake pollution. Totalnitrogen (TN) and total phosphorus (TP) contents in vertical change are experimentally analysed byusing the geoaccumulation index (Igeo) and potential ecological risk index to evaluate the heavy metalpollution in Tangxun Lake. Results reveal that the nutrient content in the surface sediment of TangxunLake decreases as depth increases. The maximum concentrations of TN and TP in the surface layerreach 0 cm to 6 cm in depth, and different pollution levels of heavy metals are detected in thesediments. The heavy metal contents along the vertical direction are similar, and the degree of pollutionexhibits the following order: Cd > As > Zn > Cu > Cr > Pb. The potential ecological harm index isevaluated, and the following ecological risk degree of heavy metals is obtained: Cd > As > Pb > Cu >Cr > Zn. Multivariate statistical analyses suggest that Pb, Cu, Cr, and Zn are mainly from naturalsources, Cd and As are from anthropogenic sources, and TN and TP are from urban sewage andfisheries. This study provides significant insights into the pollution treatment of Tangxun Lake in China.
机译：通过详细分析唐x湖污染现状，确定了武汉市最大的城市湖泊沉积物中养分和重金属含量。利用地积累指数（Igeo）和潜在生态风险指数对唐x湖的重金属污染进行了评价，对垂直变化的总氮（TN）和总磷（TP）含量进行了实验分析。结果表明，塘x湖表层沉积物中养分含量随深度增加而降低。表层中总氮和总磷的最大浓度达到0 cm至6 cm的深度，并且在这些沉积物中检测到不同的重金属污染水平。垂直方向的重金属含量相似，污染程度表现为Cd> As> Zn> Cu> Cr> Pb。对潜在的生态危害指数进行了评估，得出以下重金属的生态风险程度：Cd> As> Pb> Cu> Cr> Zn。多元统计分析表明，铅，铜，铬和锌主要来自自然资源，镉和砷来自人为来源，总氮和总磷来自城市污水和渔业。该研究为中国塘x湖的污染治理提供了重要的见识。

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