净水技术2025，Vol.44Issue(4)：150-158,9.DOI:10.15890/j.cnki.jsjs.2025.04.018
上海市城区某河道底泥重金属污染评价及来源分析
Evaluation and Source Analysis of Heavy Metal Pollution in Sediment of a River in Shanghai City
摘要
Abstract
[Objective]The assessment and source identification of heavy metal contamination in river sediments are of critical importance for the prevention and mitigation of river pollution.[Methods]In this paper,the distribution characteristics of eight heavy metals(Cd,Cu,Pb,Zn,Hg,As,Cr and Ni)in the sediment of West River of Outer Ring Road were analyzed.The pollution degree of heavy metals in the sediment was evaluated by local accumulation index and potential ecological risk index.The trace analysis of heavy metals was carried out by Pearson correlation and principal component analysis.[Results]The result showed that the average contents of heavy metals Cd,Cu,Pb,Zn,Hg,As,Cr,Ni in river sediment of West River of Outer Ring Road were 0.11,24.26,24.40,76.91,0.07,6.93,85.52,69.57 mg/kg,and the distribution of Cd,Cr and Hg in river sediment was very uneven.According to the evaluation of ground accumulation index,the pollution degree of heavy metal elements in the river sediment was in the order of Ni＞As＞Cr＞Pb＞Cu＞Cd＞Zn＞Hg,and the Ni in the sediment at all points was mildly polluted,while the Hg and Cr in some points were mildly polluted.The evaluation of potential ecological risk index showed that heavy metal Hg at W10 and W11 was a high risk,Cd was a medium risk,Hg at W12,W13,W16,W17 and Cd at W18 was a medium risk,and the ecological risk was mainly contributed by heavy metal Hg,Cd,As and Ni.Pearson correlation and principal component analysis showed that heavy metals Pb,Cu and Zn in sediment may be related to transportation,Cr and Ni may be related to industrial production,and Cd and Hg may be related to air pollution.[Conclusion]The sediment in urban river channels may be subject to complex pollution,and it is imperative to closely monitor the variations in heavy metals such as Hg,Cd,As and Ni.关键词
上海市/河道底泥/重金属/污染评价/来源分析/生态风险Key words
Shanghai City/sediment/heavy metals/pollution assessment/source analysis/ecological risk分类
环境科学引用本文复制引用
聂世勇,黄志金,王建芹..上海市城区某河道底泥重金属污染评价及来源分析[J].净水技术,2025,44(4):150-158,9.基金项目
上海市水务局2022年度科研计划项目(沪水科2022-01) （沪水科2022-01）
