典型塘库湿地底泥重金属污染环境风险评价

Environmental Risk Assessment of Heavy Metal Pollution in Typical Pond and Reservoir Wetland Sediments

摘要: 本文对云南省大理市某库塘湿地进出口位置、重点区域等11个采样点采集并测定底泥中11项指标(有机质、全氮、全磷、Cu、Zn、Ni、Pb、Cd、Cr、As和Hg)含量，进行底泥重金属污染环境风险评价。把库塘湿地分为不同典型区域，采用主成分分析、地累积指数法、潜在生态风险指数法等方法分析库塘湿地底泥重金属，结果显示库塘湿地西部底泥重金属的平均含量、主成分分析、地累积指数、潜在生态风险指数均大于中部湿地和东部湿地，湿地生态修复时，应重点治理西部湿地。

Abstract: This article collected and measured the content of 11 indicators (Organic Matter, Total Nitrogen, Total Phosphorus, Cu, Zn, Ni, Pb, Cd, Cr, As, and Hg) in the sediment of 11 sampling points, including the import and export locations and key areas of a reservoir wetland in Dali City, Yunnan Province, for environmental risk assessment of heavy metal pollution in sediment. The pond and reservoir wetland were divided into different typical areas, and methods such as principal component analysis, land accumulation index, and potential ecological risk index were used to analyze the heavy metals in the sediment of the pond and reservoir wetland. The results showed that the average content of heavy metals, principal component analysis, land accumulation index, and potential ecological risk index in the sediment of the western part of the pond and reservoir wetland were higher than those in the central and eastern wetlands. When restoring wetland ecology, the western wetland should be given priority for management.