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Pollution Characteristics and Potential Ecological Risk Assessment of Heavy Metals in Sediments of Caohai in Guizhou Province,China

Guo Yuan

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Abstract

In order to investigate the pollution and accumulation characteristics,sediments from different directions in Caohai wetland were collected and concentrations of Zn,Cr,Pb,Cu,As,Cd and Hg in sediments were detected.Meanwhile,the spatial distribution characteristics of heavy metals in sediments were analyzed and the potential ecological risks were evaluated with RI(The Potential Ecological Risk Index).The results showed the order of the concentrations of heavy metals in the sediments was ZnCrPbCuAsCdHg and the spatial distribution of decrease from center to edge.The order of pollution level of different heavy metals was CdHgZnPbAsCuCr.The potential ecological risk index of heavy metals in sediments exceed 150 due to the high concentrations of Cd.And,the results also showed serious degree of pollution of most sampling points.

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What this paper is about

In order to investigate the pollution and accumulation characteristics,sediments from different directions in Caohai wetland were collected and concentrations of Zn,Cr,Pb,Cu,As,Cd and Hg in sediments were detected.Meanwhile,the spatial distribution characteristics of heavy metals in sediments were analyzed and the potential ecological risks were evaluated with RI(The Potential Ecological Risk Index).The results showed the order of the concentrations of heavy metals in the sediments was ZnCrPbCuAsCdHg and the spatial distribution of decrease from center to edge.The order of pollution level of different heavy metals was CdHgZnPbAsCuCr.The potential ecological risk index of heavy metals in sediments exceed 150 due to the high concentrations of Cd.And,the results also showed serious degree of pollution of most sampling points.

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Available abstract

In order to investigate the pollution and accumulation characteristics,sediments from different directions in Caohai wetland were collected and concentrations of Zn,Cr,Pb,Cu,As,Cd and Hg in sediments were detected.Meanwhile,the spatial distribution characteristics of heavy metals in sediments were analyzed and the potential ecological risks were evaluated with RI(The Potential Ecological Risk Index).The results showed the order of the concentrations of heavy metals in the sediments was ZnCrPbCuAsCdHg and the spatial distribution of decrease from center to edge.The order of pollution level of different heavy metals was CdHgZnPbAsCuCr.The potential ecological risk index of heavy metals in sediments exceed 150 due to the high concentrations of Cd.And,the results also showed serious degree of pollution of most sampling points.

Key concepts: Pollution, Heavy metals, Environmental science, Spatial distribution, Sediment, Environmental chemistry, China, Wetland

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Pollution Characteristics and Potential Ecological Risk Assessment of Heavy Metals in Sediments of Caohai in Guizhou Province,China — Research Paper | ScholarLens