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1、第23卷第4期环境科学研究Vo.l23,No.42010年4月ResearchofEnvironmentalSciencesApr.,2010白龟山水库规划区污染特征及潜在生态风险评价1,22*122成刚,张远,高宏,田自强,万峻1.兰州大学资源环境学院,甘肃兰州7300002.中国环境科学研究院,河流与海岸带环境创新基地,北京100012摘要:分析了白龟山水库及其入库河流水体和沉积物中TN,TP,有机质和Cd,Pb,Cr,Cu,Zn,Mn,Ni等7种重金属的含量及分布特征,并结合地积累指数法和HANKANSON生态危害指数法对沉积物重金属的累积效应和潜在生态风险进
2、行评价.结果表明:白龟山水库规划区内水库及河流水体主要污染物为TN和TP,其中鲁山污水厂出口断面严重超标,(TN)和(TP)高达国家地表水环境质量标准(GB38382002)类水质标准的464和221倍;w(TN),w(TP),w(Cd),w(Pb),w(Cr),w(Cu),w(Zn)与w(OM)呈显著正相关,而w(Mn)和w(Ni)与w(OM)的相关性不显著;鲁山污水厂出口沉积物重金属的生态危害最大,RI为24113,为中等生态危害,以Cd和Cu的生态危害为主,特别是Cd作为最主要的生态风险贡献因子,应适当引起重视.关键词:白龟山水库;重金属;地积累指数评价;潜在生态风
3、险中图分类号:X8204文献标志码:A文章编号:1001-6929(2010)04-0452-07ContaminationCharacteristicsandPotentialEcologicalRiskAssessmentofPlanningAreasinBaiguishanReservior1,22122CHENGGang,ZHANGYuan,GAOHong,TIANZiqiang,WANJun1.CollegeofEarthandEnvironmentalScience,LanzhouUniversity,Lanzhou730000,China2.Riverand
4、CoastalEnvironmentalResearchCenter,ChineseAcademyofEnvironmentSciences,Beijing100012,ChinaAbstract:Concentrationsanddistributioncharacteristicsoftotalnitrogen(TN),totalphosphorous(TP),organicmatter(OM),andsevenkindsofheavymetalscadmium(Cd),lead(Pb),chromium(Cr),copper(Cu),zinc(Zn),manganese(Mn),
5、andnickel(Ni)intheBaiguishanreservoir,itsmajorinputriversandsedimentswereanalyzed.TheaccumulationeffectsandpotentialecologicalrisksoftheheavymetalsinthesedimentsofBaiguishanreservoirandmajorinputriverswereevaluatedbyapplyinggeoaccumulationindexandHankansonecologicalriskindexmethods.Theresultsdemo
6、nstratedthatTNandTPwerethemajorpollutantsinthewaterofthereservoirandriverswithinthewatersourceplanningarea,especiallytheoutfallwaterofLushansewageplant,inwhichconcentrationsofTNandTPrespectivelyreachedupto464timesand221timestheSecondaryEnvironmentalQualityStandardforSurfaceWater(GB38382002).Sig
7、nificantlypositivecorrelationsbetweenTN,TP,Cd,Pb,Cr,Cu,ZnandOMcontentswerefound,whereascorrelationswerenotsignificantbetweenMn,NiandOMcontents.TheecologicalriskhazardofheavymetalsinsedimentsofLushansewageplantout
