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1、OrganochlorinepesticidesinsedimentsfromHonghuLake,ChinaOrganochlorinepesticidesinsedimentsfromHonghuLake,China*WANGXiang-qin1,2,QIShi-hua1,2,LIJie1,2,LIJun1,2(1.KeyLaboratoryofBiogeologyandEnvironmentalGeologyofChineseMinistryofEducation,ChinaUniversityofGeosciences,Wuhan430074,China;2.
2、SchoolofEnvironmentalStudies,ChinaUniversityofGeosciences,Wuhan430074,China)28OrganochlorinepesticidesinsedimentsfromHonghuLake,ChinaAbstract:Thelevelsof13organochlorinepesticides(OCPs)insedimentsofHonghuLakewereinvestigatedinordertoevaluatetheirpotentialpollutionandrisk.Atotalof30sedim
3、entsamplesfrom15samplinglocationswerecollectedinthelakeduringJuly,2005.Thetotalconcentrationsintop-sedimentsamplesandsub-sedimentsamplesrangedfrom3.52ng/gto69.71ng/gand0.49ng/gto97.37ng/g,respectively.TheHCHisomers,DDTcongeners,aldrin,trans-chlordane,cis-chlordane,heptachlorandendrin-ke
4、toneweresignificantinthesesamples.TheconcentrationsofOCPsinthelakeshoresedimentswerehigherthanthosesampledacrossthelake.DistributionofHCHs,DDTsandotherOCPsweredifferent,indicatingtheirvariouscontaminationsources.Compositionanalysisinsedimentsindicatedrecentusageordischargeoflindane,dico
5、folintothelake.Keywords:organochlorinepesticides;sediments;HonghuLake;China*Acknowledgments:TheauthorsgreatlyappreciatetheNationalBasicResearchProgramofChinaforitsfinancialsupportandDoctorJuliaforherkindhelpinmodifyingthispaper.WANGXiang-qin(1982-),female,graduatestudent;mainresearchfie
6、ld:environmentalorganic-chemistry.E-mail:xiangqin109@163.com.1.IntroductionOCPsareamongthemostcommonlydetectedpesticidesaroundtheworld.Althoughmostwerebanneddecadesago,theycanstillbefoundintheenvironmentinseveralmatricessuchassurfacewater,soil,riverandmarinesediments[1].Andduetotheirvol
7、atilityandpersistenceintheair,OCPsaresubjectedtolong-rangeatmospherictransport.Therefore,OCPsreleasedinthetropicalandsubtropicalenvironmentscouldbedispersedrapidlythroughairandwater,andtendtoberedistributedonaglobalscale[2-3].ManydevelopingcountriesarestillusingOCPsforagricultu
