摘要
为了解青浦区东片区村级河道底泥重金属污染特征、空间分布、污染程度及污染来源,对区域内的89条村级河道、128个底泥采样点中重金属(Cd、Cu、Pb、Zn、Hg、As、Cr、Ni)含量进行分析,采用地累积指数法、内梅罗污染综合指数法及潜在生态风险指数法评价了底泥中重金属污染程度,同时利用Pearson相关性分析、R型聚类分析探讨了底泥污染的来源。结果表明:区域中河道底泥中Cd和Hg存在富集现象,8项重金属空间分布上存在显著差异性;地累积指数法、内梅罗污染综合指数法及潜在生态风险指数法评价结果显示,底泥主要受重金属Cd、Hg的污染,区域内河道底泥处于轻度污染水平;底泥污染溯源分析表明,重金属可能来源于河道周边农业源污染和工业源污染。
In order to understand the characteristics,spatial distribution,pollution degree and pollution source of heavy metal pollution in the sediment of the village-level river in the east area of Qingpu District,the contents of heavy metals(Cd,Cu,Pb,Zn,Hg,As,Cr,Ni)in 89 village-level river channels and 128 sediment sampling points were analyzed.Soil accumulation index method,Nemerow pollution index method and potential ecological risk index method were used to evaluate the heavy metal pollution degree in sediment.Pearson phase relationship analysis,R-type cluster analysis were used to explore the possible sources of sediment pollution.The results show that Cd and Hg are enriched in the sediment,and there are significant differences in the spatial distribution of 8 heavy metals.Soil accumulation index method,Nemero pollution index method and potential ecological risk index method all believe that the sediment is mainly polluted by heavy metals Cd and Hg,and the sediment of the river in the area is at the light pollution level.The traceability analysis of sediment pollution shows that heavy metal mainly come from agricultural and industrial source around the river.
作者
聂世勇
NIE Shiyong(Shanghai Hongbo Engineering Consulting Management Co.,Ltd.,Shanghai 201707,China;River and Lake Water Ecological Restoration Engineering Technology Research Center of Shanghai Water Affairs Bureau,Shanghai 201707,China)
出处
《环境科学与技术》
CSCD
北大核心
2024年第S2期251-260,共10页
Environmental Science & Technology
基金
上海市水务局2022年度科研计划项目(沪水科2022-01)
关键词
村级河道
底泥
重金属
污染评价
青浦区
village-level river
bottom mud
heavy metals
pollution assessment
Qingpu District
