南京不同功能区街道路面积尘重金属污染评价与源分析

2311201011ResearchofEnvironmentalSciencesVol.23No.11Nov.2010112*1.2100092.210093、、、、、wCdwCrwCuwNiwPbwZnwMnwAswVwFewTi..CrNiCrNi.CdCuPbZnAsCdCuPbZnAs.CrCuNiZnCd.、PbZnNiCd.3NiMnFeTiVCdCuPbZnAsCr.X820.2A1001－6929201011－1376－06AssessmentofHeavyMetalContaminationandSourceIdentificationofDustDepositedonRoadsCollectedfromDifferentLand-UseZonesinNanjingZHANGYun1ZHANGYu-feng1HUXin21.SchoolofEnvironmentNanjingUniversityofTechnologyNanjing210009China2.KeyLaboratoryofAnalyticalChemistryforLifeScienceMinistryofEducationCenterofMaterialAnalysisNanjingUniversityNanjing210093ChinaAbstractThirty-fivesamplesofdustdepositedonroadswerecollectedfromsevendifferentland-usezonescommercialresidentialtrafficsceniceducationalindustrialandsuburbaninNanjingChina.ThecontentsofmetalsCdCrCuNiPbZnMnAsVFeandTiinthesesamplesweredetermined.Anassessmentofheavy-metalcontaminationwasconductedbythemethodsofenrichmentfactorandNemerowpollutionindex.Principalcomponentanalysiswasappliedtothedatamatrixtoidentifythepossiblepollutionsourcesofthemetals.TheenrichmentfactorresultsshowedthatCrandNihadmoderateenrichmentinwhichthehighestCrenrichmentwasinthecommercialzoneandthehighestNienrichmentwasintheindustrialzone.CdCuPbZnandAsweresignificantlyenrichedinthestudiedsamplesinwhichthehighestCdenrichmentwasintheresidentialzoneandthehighestCuPbZnandAsenrichmentswereinthecommercialzone.TheNemerowpollutionindexresultsshowedthatCrwasbelowthesafethresholdbelongingtostillcleanwhileCuNiandZnrepresentedmildpollutionandCdrepresentedseverepollutioninthestudiedsamples.TheNemerowpollutionindicesinthedifferentland-usezonesweredifferentfromeachother.TheNemerowpollutionindicesforPbZnNiandCdwererelativelyhigherinthecommercialresidentialandtrafficzones.Principalfactoranalysisshowedthatheavymetalcontaminationindustdepositedontheseroadswaslikelyfromthreesources.NiMnFeTiandVwerelikelyfromlocalsoil.CdCuPbZnandAswerelikelyfrommixedsources.Crwaslikelyfrompetroleumindustrysources.Keywordsroaddepositeddustheavymetalprincipalfactore[e-mail].*1971－、[e-mail]、1-3.、、114-6...、、7-10.11.、.wCdwCrwCuwNiwPbwZnwMnwFewAswTiwV.11.1.、3d..47、、、、、.20091016207125〔S1～S5、S6～S10、S11～S15、S16～S20、S21～S25、S26～S30S31～S35〕..1.1Fig.1Mapforsamplingsites7731231.2、、25063μm..MilestoneEthos12115min210℃220min.3mLHNO36mLHF0.5mLHClO4.6mol/L15min3.ICP－OESOptima5300DVPerkinElmerUSAICP－MSElan9000PerkinElmerUSA.1.3SPSS13.0.22.1CdCrCuNiPbZnMnFeAsTiV1.1wFewTiwMnwZn.1Table1Heavymetalconcentrationsinroaddepositedsedimentsfromdifferentzonesw/mg/kgw/%CdCrCuNiPbZnMnAsVTiFeS10.71064.2136.332.4150.526658814.471.10.3742.14S21.01463.1100.125.578.379853015.154.60.2741.79S31.124154.2272.456.1203.752462014.867.20.3433.46S41.923145.1199.456.3198.375467018.572.90.3213.22S50.69890.380.034.964.622655812.975.80.3802.35S61.286119.2132.945.6193.538554915.476.10.3472.87S72.168135.7166.050.8154.059565715.278.90.3913.81S81.669138.9194.570.7169.163765612.976.30.4003.92S91.458114.8119.245.5111.044758314.273.60.4003.42S100.72784.174.329.383.227059015.465.90.3272.63S110.862132.8179.857.5121.940756311.670.60.3873.14S120.917119.7171.249.498.638362614.273.50.3913.49S131.106130.7173.449.296.740257712.969.90.3993.36S140.811125.5134.247.0125.942552713.166.40.3782.89S151.006143.2162.149.6136.542166014.072.20.3513.44S161.22477.951.633.864.027749812.965.90.3762.41S171.060103.869.136.864.336055112.369.40.3922.59S180.43560.628.727.043.814067210.260.60.4051.99S190.49980.479.331.044.417149511.681.40.4292.27S201.083137.6130.145.296.633465713.476.60.4523.31S211.507121.6111.548.668.534358413.471.50.4043.11S222.19087.795.439.772.930552515.664.00.3382.62S232.14872.193.024.868.021838212.042.00.2482.03S240.81684.348.339.537.320951011.270.70.4342.43S250.55570.345.041.541.814448714.980.40.4252.19S261.101190.0112.690.0137.240485712.076.90.4646.60S270.827234.0135.4114.694.743187112.285.70.4695.89S281.332101.9211.0268.1196.9619129416.11020.5685.96S290.711200.0108.792.177.434182811.893.10.5745.56S300.986250.4141.1104.591.539992813.494.60.5885.51S310.890181.2127.554.594.544678511.885.90.5064.24S320.769150.879.647.478.242171714.189.20.5143.65S330.59695.546.929.851.421646510.571.70.4722.54S341.058169.8142.045.2110.962979412.883.90.4774.28S351.041159.9147.844.198.743576213.981.80.4604.511.094125.5122.955.9103.439464613.474.60.4133.420.12677.822.326.726.262.658510.083.40.4103.02873111wZnwAsS1～S551415.1mg/kgS16～S20.wPbwCdS6～S10142.11.461mg/kgS21～S2557.70.862mg/kg.wCrwNiwMnwFewTiwVS26～S30195.6133.9956mg/kg5.90%0.534%90.5mg/kg.wCuwNi71.834.7mg/kg.wCrwFewMnwV87.2mg/kg2.48%498mg/kg65.7mg/kg.wTi0.339%.、S11～S15、、S31～S35.13wCuwPbwZnwNiwCd.TwCdwCrwCuwNiwPbwZnwAswVP0.01wMnP0.05wTiwFeP0.05.wCdwCrwCuwNiwPbwZnwAs8.691.615.512.103.946.291.34.2.22.2.1.14-15EF=X/Y/X/YXmg/kgYmg/kg.FeFe4.75%FeFe.16.EF2.CHESTER17EF10.2CdAs1012.610.2.SUTHERLAND18EF2522～55～2020～4040.2CdCrCuNiPbZnAsCrNiCrNi.CdCuPbZnAsCdCuPbZnAs.2Table2EnrichmentfactorofheavymetalsinroaddepositedsedimentsfromdifferentzonesEFCdCrCuNiPbZnMnAsTiV15.13.878.242.73