东洞庭湖沉积物中重金属的分布特征污染评价与来源辨析

2412201112ResearchofEnvironmentalSciencesVol．24No．12De[e-mail]．、1232312323231．4140002．4100823．410082200816、．CdHg、2．wPbwHgwCdwZnwCrwAs．252.267%33.380%．、2PbHgCdZnCrAs．PCAX524A1001－6929201112－1378－07DistributionCharacteristicsPollutionAssessmentandSourceIdentificationofHeavyMetalsintheSedimentofEastDongtingLakeWANQun1LIFei23ZHUHui-na23WANGTie1LIANGJie23HUANGJin-hui23XIEGeng-xin231．YueyangEnvironmentalMonitoringCenterYueyang414000China2．CollegeofEnvironmentalScienceandEngineeringHunanUniversityChangsha410082China3．KeyLaboratoryofEnvironmentalBiologyandPollutionControlHunanUniversityMinistryofEducationChangsha410082ChinaAbstractThedistributioncharacteristicsofpollutionaccumulationandmainsourcesofheavymetalsinsedimentfromEastDongtingLakewereinvestigatedbasedonanalysisofsamplesfromsixrepresentativemonitoringsectionsinJanuary2008bythegeo-accumulationindexmodelmultivariableanalysistheoryandprincipalcomponentanalysismethod．TheresultsshowedthattheenrichmentdegreeofCdandHgbecamehigherateachstationespeciallyintheZhangshugangStationandtheexitoftheDongtingLakeStationreachingaseverepollutionlevel．CorrelationanalysisindicatedthatsignificantpositivecorrelationsexistedamongwPbwHgwCdandwZnandaswellaswCrandwAsbuttherewasnosignificantcorrelationbetweenotherheavymetals．Principalcomponentanalysiswasappliedtoestimatethesourcesofheavymetalsinthesediment．Itwasfoundthatthefirsttwocomponentsaccountedfor52.267%and33.380%ofthetotalvariance．OnthebasisofpreviousresearchandinformationontheDongtinghydrographicnetthefirstprincipalcomponentsincludedPbHgCdandZnwhichwereconsideredtocomefromminingandheavyindustry．ThesecondprincipalcomponentsincludedCrandAswhichwereprobablyfromagriculturalcontaminationandsewage．KeywordsEastDongtingLakesedimentgeo-accumulationindexheavymetalssourceprincipalcomponentanalysisPCADOI10.13198/j.res.2011.12.50.wanq.00912、－、－1-2．3-6．、、、“”7-8．“”“”9-10．、．112°18'E～113°15'E28°30'N～29°38'N、、、、、、、11．、、12-14．15-17．6、PCA、．11．1200816S1—S2—S3—S4—S5—S6—．1．DDC－20～10cm34～6PVC．1Fig．1SamplingstationsofsurfacesedimentintheEastDongtingLake1．2、、1000．165mm、2000．074mm．0．1000gHNO3HClO4ICP－MSAgilent7500cxCrAsCdCuZnPb6〔、《ICP－973124MS》DZT0223—2001〕．0．3000gSnCl2·2H2OHg．10%5%w1．1Table1TotalcontentsofheavymetalsinsedimentofthewatersystemintheEastDongtingLakewmgkgCrCuZnPbCdHgAsS179.90217.0041.105.9679.900.1327.60S298.6033.90110.0028.901.630.0922.30S399.4040.80159.0061.602.930.1323.89S4115.0042.90125.0043.900.530.0818.90S588.9041.00158.0055.505.960.1622.20S6124.0040.7089.3018.790.250.0414.80100.9769.38113.7335.7815.200.1121.62《》GB15618—19953501003003500．61．0201．31．3．1MULLER181969．IgeoIgeo=log2CikBi1CiimgkgkBiimgkg．72．2Table2PollutionlevelofheavymetalsbasedonindexofgeoaccumulationIgeo≤00～11～22～33～44～5≥501234561．3．21k1．5．、、Bi19-233．3Table3TheintervalglobalbackgroundvalueinsedimentoftheDongtingLakeCrCuZnPbCdHgAsBimgkg37．5054．4016．7023．5080．00109．0023．0027．200．210．470．020．049．0023．8022．11pH≥7．5wCrwCuwZnwPbwCdwHg083112、wAs100.9769.38113.7335.7815.200.1121.62mgkg《》GB15618—19957wCdwAs5．wAs≤30mgkgGB15618—1995wCd15.20mgkgGB15618—199515Cd．200422wCrwCuwZnwPbwHgwAs．、wCdwAsGB15618—1995wCd．13624．4Table4Theintervalindexesofgeo-accumulationandrankingsofheavymetalpollutioninsedimentfromtheEastDongtingLakeCrCuZnPbIgeo12IgeoIgeoIgeoS1－0．310．2310．490．9910．961．4111．111．362S21．722．2630．170．661－0．56－0．1100．160．401S30．350．8910．851．342－0．300．1510．130．371S40．350．8910．781．2720．400．8510．951．201S50．180．7210．721．212－0．100．3510．650．891S60．030．5610．240．731－0．75－0．300－0．180．061CdHgAsIgeoIgeoIgeoS12．874．0353．574．575－0．750．661S20．141．3022．423．1540．051．452S3－0．240．9211．502．503－0．690．721S41．082．2433．424．425－0．530．871S50．451．6122．793．794－0．430．971S6－1．140．0211．772．773－0．730．66112．467．CrCuPbZnAsS1PbS2AsS3S4S5CuS2CrCdHg6IgeoS3S6S1S4．CdHg22、24．22．S1S42CdHg．2．25SPSS16．0．1831245Table5CorrelationcoefficientsofheavymetalsinsedimentoftheEastDongtingLakewCrwCuwZnwPbwCdwHgwAswCr1wCu－0．4801wZn－0．4460．2361wPb－0．3790．3480．938＊＊1wCd－0．345－0．0130．948＊＊0．813*1wHg－0．2650．1580．903*0．971＊＊0．7961wAs0．955＊＊－0．426－0．380－0．238－0．306－0．1291＊＊P＜0．01*P＜0．05．5wPbwHgwCdwZnPbHgCdZn．wCrwAs．．2．3PCA．、、、25-26．p．6wCdwCrwCuwCdwZnwAswPbwHg62．612285.656%2．52.276%33.380%．、2．62PC16Table6TotalvarianceofheavymetalsinsedimentbyPCA%%%%%%14.17559.64259.6424.17559.64259.6423.65952.27652.27621.82126.01485.6561.82126.01485.6562.33733.38085.65630.79011.29196.94740.1832.61199.55850.0310.442100.0006－1．14×10－17－1．63×10－17100.0007－1．38×10－16－1．979×10－16100.000CdHgZnPb15．PC2CrAs．．1113、、、、、．CdHgZnPb4283112、2Fig．2Loadingplotsofthepollutantsinthespacedefinedbytwocomponents、CdHgPbZn．“”ZnPbCuHg27-30“”、、．CdHgZnPb．CrAs．31CrAs．、．．3a．wAsGB15618—1995wCdGB15618—1995155GB15618—1995．200422Cd．b．CdHgCdHg．c．PbHgCdZnCrAs．d．CdHgZnPbCrAs．．References1AMASONJGFLECTCHERBA．A40+yearrecordofCdHgPbandUdepositioninsedimentsofPatroonReserviorAlbanyCountyNYUSAJ．EnvironPollut2003123383-391．2GHREFATHYUSUFN．AssessingMnFeCuZnandCdpollutioninbottomsedimentsofWadiAl-ArabDamJordanJ．Chemosphere20