云南某矿区周边耕地土壤重金属污染特征及来源解析

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中图分类号：X53 文献标志码：A 文章编号：1672-2043（2025）07-1732-11 doi：10.11654/jaes.2024-0681

Evaluation and source analysis of heavy metal polltion in cultivated soil around amining area in Yunnan Province

XU Lu1，3 ，ZHOU Hongyin²3， ZHAO Xuanyue1，3， ZHANG Naiming1，3*，BAO Li1，3 （1.ColegeofesouesndEnviroent，YuanAgriculturalUniversityKunming6ia;2.Collgeoflantotectio YunanAgrculturalUversityKuning50ina;3.uanrovicialEngineringReseachenterforoilFerltiod PollutionRemediation，Kunming6502O1，China）

Abstract：Inordertoexplorethestatus，sourceandsatialdistributionofheavymetalpolutioninthecultivatedlandaroundamiga inYunnan，atotaloflpleseelefundhotsfealssC，CuCd， Znweredeterined.TheNmroompreensiveplltionotentialoogicalriskandgoacuulationindexereusedtoaluatethe statuofsoileavymetalpolution.TercGISiversedistanceweightinterpolationmethodwasusedtodawthespatialdistributinmap of soilpolltion.Principalcompoenanalysis（PCA）andPMFmodelwereusedtoexplorethesourcesofheaymetals.Theresultssowed thattheaveragecontentsoftheeightheavymetalsinthestudyareaere1.O7～9.83timesoftesoilbackgroundvalueofYunnanProvince. The spatialdistributionofhavymetaswasunevenandthesatialdistrbutionofZn，As，Hg，CdandPbwassiilar.Teaveragealuof theNemerowcompositeindexas5.51，ichasatelevelofsverepolutionandthedecreasingtrendoftegeoaccuulatiodex was Cd>Pb>Cu>Hg>Zn ∣> C Δr> N > As，and the heavy metal Cd was heavily polluted and accumulated significantly in the soil. The overall ecologicalriskwasataighologicalrisklevel，andCdandHgerethemaicontributingfactors，withontributionratesashighs 60.50% and 23.09 % ，respectively. The results of source analysis showed that As and Cd were mainly from industrial sources （ 24.17% ）. Cr， Cu and Ni were the main parent sources（ 35.26% ）.Hgand Zn were mainly from agricultural sources（ 25.48% ）.ThePbmainlycame from the mixed source of atmospheric traffic（ 15.09% ）.

Keywords：heavy metal; mining area; arable soil; risk assessment; source resolution

土壤重金属污染具有显著的生物毒性、隐蔽性、持久性、长期易积累和不可逆转性等特征。（剩余23193字）