典型城郊湖泊沉积物重金属生态风险评价

*申秋实1邵世光2保琦蓓3张雷1范成新11．2100082．2100983．315192。IgeoＲI。Cr、Ni、Cu、Zn、Cd、PbCu＞Cd＞Zn＞Ni＞Pb＞Cr＞HgCd＞Hg＞Cu＞Pb＞Ni＞Cr＞ZnCd。。DOI10.13205/j．hjgc．201410031POTENTIALENVIＲONMENTＲISKASSESSMENTOFSEDIMENTHEAVYMETALSINATYPICALSUBUＲBANSHALLOWLAKEShenQiushi1ShaoShiguang2BaoQibei3ZhangLei1FanChengxin11．StateKeyLabofLakeScienceandEnvironmentNanjingInstituteofGeographyandLimnologyChineseAcademyofSciencesNanjing210008China2．CollegeofHydrologyandWaterＲesourcesHohaiUniversityNanjing210098China3．NingboAcademyofScienceandTechnologyforInspectionandQuarantineNingbo315192ChinaAbstractSedimentsinsuburbanshallowlakesareusuallypollutedindifferentlevelsandfacingproblemssuchasaccumulationofheavymetalpollutionandincreasingofecologicalrisk．ThisresearchfocusedonheavymetalsinsurfacesedimentsofnearshoreareaofLakeBeimayangatypicalsuburbanshallowlake．Distributionsandpollutioncharacteristicsofdifferentheavymetalswerestudied．GeoaccumulationindexIgeoassessmentandpotentialecologicalriskindexＲIassessmentwereemployedtoevaluatetheecologicalriskofheavymetals．TheresultsshowedthattheconcentrationsofCrNiCuZnCdPbinsedimentswerehigherthanenvironmentalbaselinesinmostsitesandreflectedcertaindegreesofenrichment．BasedonthegeoaccumulationindextheriskorderofheavymetalswasCu＞Cd＞Zn＞Ni＞Pb＞Cr＞Hg．HoweveraccordingtosingleheavymetalecologicalriskindextherisklevelsarrangedinCd＞Hg＞Cu＞Pb＞Ni＞Cr＞Zn．ThustheresultsofbothassessmentsindicatedthatsedimentsweremainlypollutedbyCdaccompaniedwithotherheavymetals．Potentialecologicalriskindexindicatedthattherisklevelswerehigherinestuaryareasthanothersiteswhichreflectedthatinputsfromriversshowedsignificantinfluenceonheavymetalpollution．Keywordsheavymetalsedimentgoeaccumulationindexpotentialecologicalriskindexlake*41103033BK2011879LQ13B070003。2013－05－1501-2。3-4。－、pH、、731EnvironmentalMonitoring＆Assessment、、56-8。39。、。、、、。。10km22m10、。Hg、Cr、Ni、Cu、Zn、Cd、Pb7。11.1样品采集10GPS。1。201118.4cm0～5cm24h。1.2沉积物重金属分析60℃、200。Cr、Ni、Cu、Zn、Cd、Pb7700XICP-MSHgHydra-c。1Fig．1Thelayoutofsamplingsites1.3沉积物重金属评价方法1.3.1geo-accumulationindexIgeo11、12-14。Igeo=log2Cnk·B()n1IgeoCnnBnnk1.5。Igeo1。1Table1PollutiongradeofIgeoIgeo＜00～11～22～33～44～5≥501234561.3.2potentialecologicalriskindexＲI15412。2—4。Cif=CisCin2Eir=Tir·Cif3ＲI=∑ni=1Eir4CifiCisi831EnvironmentalEngineeringCiniTisiEiriＲI。1617283。2Table2BackgroundandtoxiccoefficientofheavymetalsHgCrNiCuZnCdPb/mg·kg－10.1665.7229.1222.7873.020.1220.394025513053Table3EirlevelofsingleheavymetalandcomprehensiveＲIlevelofdifferentheavymetalsEir＜4040～8080～160160～320≥320ＲI＜150150～300300～600≥60022.1不同点位沉积物重金属含量分析4。HgCr、Ni、Cu、Zn、Cd、Pb2。。9Hg、Cr、Ni、Cu、Zn、Pb。Cd10Hg、Cu、Zn。910。1Cr、Ni、Zn、Cd、Pb。2Hg、Cr、Ni、Cu、Pb。7。4Table4Characteristicsofheavymetalsinsurfacesedimentsmg/kgHgCrNiCuZnCdPb0.13108.7649.37127.04225.160.3332.290.0657.7327.7426.7093.460.1520.170.0980.5639.2660.55131.620.2526.400.0215.147.1928.8339.460.063.5426.2018.7918.3247.6129.9825.9013.402.2不同点位沉积物重金属地积累指数评价115。、3。Hg、Cr、Ni、Cu、Zn、Cd、PbIgeo－1.42、－0.31、－0.81、0.69、0.21、0.47、－0.22。Cu、Zn、CdHg、Cr、Ni、Pb。1、910。Cu＞Cd＞Zn＞Ni＞Pb＞Cr＞Hg。5Table5IgeoassessmentresultsofsedimentheavymetalsHgCrNiCuZnCdPbIgeoIgeoIgeoIgeoIgeoIgeoIgeo1－1.420－0.1000.0511.0220.5610.821－0.1102－1.980－0.740－0.6500.101－0.1900.421－0.6003－0.920－0.2000.0201.0720.4410.861－0.0304－1.590－0.390－0.1800.5910.1610.451－0.2005－1.710－0.320－0.1800.7110.1810.521－0.2006－1.950－0.340－0.2200.031－0.150－0.150－0.3607－1.300－0.300－0.1800.6510.2410.311－0.2908－1.300－0.1300.041－0.360－0.230－0.220－0.1209－0.9100.1410.1811.8921.0420.8010.08110－1.090－0.770－0.6501.2120.1110.941－0.420931EnvironmentalMonitoring＆Assessment2.3潜在生态风险分析23。2。2Fig．2Characteristicsofpotentialecologicalriskofsingleheavymetalindifferentsediments3Cd“”Eir＜40。Cd64.65“”40≤Eir＜80。310“”80≤Eir＜160。Cd。HgCd“”9041EnvironmentalEngineering3Eir“”。Hg。EirCd＞Hg＞Cu＞Pb＞Ni＞Cr＞Zn。4ＲI3。ＲI3“”ＲI＜150。1、3、9、10ＲI“”。CdHg。3Fig．3CharacteristicsofcomprehensiveecologicalriskindexofheavymetalsindifferentsedimentsCuCdCdHg。11。CdHg3040CdHg。Cd。31。2。Cu＞Cd＞Zn＞Ni＞Pb＞Cr＞HgCu、Cd、ZnCd＞Hg＞Cu＞Pb＞Ni＞Cr＞ZnCdHgＲI。。CdCdHg。1．J．200419S1434-438.2GaoXChenCTA．HeavymetalpollutionstatusinsurfacesedimentsofthecoastalBohaiBayJ．WaterＲesearch20124661901-1911.3．J．2002143235-241.4．J．201030S146-51.5OyewaleAOMusaI．PollutionassessmentofthelowerbasinofLakesKainji/JebbaNigeriaHeavymetalstatusofthewaterssedimentsandfishesJ．EnvironmentalGeochemistryandHealth2006283273-281.6HillerEJurkovicLSutriepkaM．MetalsinthesurfacesedimentsofselectedwaterreservoirsSlovakiaJ．BulletinofEnvironmentalContaminationandToxicology2010845635-640.7UluturhanE．HeavymetalconcentrationsinsurfacesedimentsfromtworegionsSarosandGokovaGulfsoftheEasternAegeanSeaJ．EnvironmentalMonitoringandAssessment20101651/4675-684.8．J．201134S2344-348.9．J．200521831-3638.10．M．1982199.75141EnvironmentalMonitoring＆Assessment6、7。67b2Table6Elementcontentoftheconverterdustposition2showninFigure7b%OSFeCu41.1717.7119.6720.4777b3Table7Elementcontentoftheconverterdustposition3showninFigure7b%OSFeNiCu40.0416.211.7512.864.428a、8b6、7O、SFe、NiCu。XＲD9。9XＲDFig．9XＲDanalysisoftheconverterdust9Fe2O3、Fe3O4。3、。。。。1．J．200561-8.2．J．200925