成渝地区典型雨源型河流底泥重金属污染特征及评价研究

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中图分类号：X522

文章编号：1674-6139（2025）12-0028-06

文献标志码：B

Abstract：InordertounderstandthecharacteristicsofeavymetalpolutioninthesdimentoftheXimeiRiver，atypicalrainsource riverintheCengdChongqingegion，theontentsof8indsofeavyetalsinOsdimentointswereanalyzed，teiristritio characteristicswerestudied，andthepolltiondegreewasevaluatedbyusingthreemethods：theNemerocomprehensivepolutionidex method，thepotentialcologicaliskindexmetodandtheimprovedgoacculationindexmetodTesultssowtatincasthe highestcontent，cadmiumandmercuryhavethelowestcontent，utthetwoexceedtheandardthemostseriously.Thecontentsofght heavymetalsvaryindiferentriversections.Cadmiumandarsenichavenocorelationwitheachotherorwiththeotermetals，while therearepositiecorrelatiosofvaringegreesamongteotersixmetalsAlltreeevaluatiomethodshveoaiedthespaitrbution characteristics of“upstream > midstream > downstream”，and the main polution-causing factors are cadmium and mercury.

Keywords：sediment；heavymetal；pollutioncharacteristics；evaluation method

前言

随着现代化发展和城市化进程，人类活动使大量工业、农业和生活的废水排入河流，造成水体污染，重金属是导致水体污染重要原因之一。（剩余5694字）