欢迎来到天天文库
浏览记录
ID:52222428
大小:775.02 KB
页数:7页
时间:2020-03-25
《重庆市长寿湖重金属污染评价.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(7):1355—1361JournalofAgro—EnvironmentScience重庆市长寿湖重金属污染评价周莉萍1,一,金相灿2,卢少勇2,焦伟2(1.重庆市长寿区环境保护局,重庆401220;2.中国环境科学研究院湖泊环境创新基地,国家环境保护湖泊污染控制重点实验室北京100012)摘要:中国环境科学研究院采集了长寿湖沉积物样品,分析其表层沉积物中Pb、Cd、Cu、zn、Cr、Ni、Hg、As8种重金属元素含量特征,结果表明,按照《土壤环境质量标准》,目前长
2、寿湖主要是Cd、Hg和As的污染,且中部湖区沉积物重金属污染强度要高于东部和西部两区。各重金属间的相关性分析表明,Cu—zn、Cu—Ni、zn—Ni之间呈极显著相关,说明这3种元素污染源可能相同。由潜在生态风险评价结果可知,长寿湖重金属污染只是略超轻微生态危害,各重金属对长寿湖生态风险影响程度由高到低依次为:Hg>Cd>As>Pb>Ni>Cu>Cr>Zn。应用Hakanson潜在生态危害指数法评价其生态风险,并提出了相关污染防治措施,为预防和综合治理长寿湖提供了科学依据。关键词:长寿湖;重金属污染;
3、生态风险中图分类号:X825文献标志码:A文章编号:1672—2043(2010)07—1355—07AccessofHeavyMetalsPollutionofChangshouhuinChongqing,ChinaZHOULi-pin91一,JINXiang-can2,LUShao-yon92,JIAOWei2(1.EnvironmentalProtectionAgencyofChongqingChangshou,Chongqing401220,China;2.StateEnvironmenta
4、lProtectionKeyLaboratoryforLakePollutionControl,ResearchCenterofLakeEnvironment,ChineseResearchAcademyofEnvironmentSciences,Beijing100012,China)Abstract:Heavymetalsaremainlycarriedinsedimentsofwaterbody,theirconcentrationsplayanimportantroleonenvironme
5、ntalqualityofthewaterbody.Theconcentrationsofeightheavymetals(Pb,Cd,Cu,Zn,Cr,Ni,HgandAs)fromsurfacesedimentsofChangshouhuwereanalyzed.TheresultsshowedthatthesurfacesedimentsofChangshouhuwerepollutedmainlybyCd,HgandAscomparedwiththeEnviron-mentalquality
6、standardforsoils,andtheintensityofheavymetalspollutionofmiddleareawashigherthanthatofeasternandwesternarea.Accordingtothecorrelationanalysisofvariousheavymetals,therewasaremarkablecorrelationbetweenCu,NiandZn,whichsuggestedtheymighthavethesameorigin.Ba
7、sedonthepotentialecologicalriskassessmentresults,thesurfacesedimentsofChangshouhuhadreachedalowecologicalrisklevel,andthedegreeofecologicalriskofdifferentheavymetalsinsurfacesedimentsindescendingorderwasHg>Cd>As>Pb>Ni>Cu>Cr>Zn.Ecologicalriskindexpresen
8、tedbyHakansontoassessthepotentialecologicalriskofChangshouhuwasutilized,andforcontrollingofheavymetalspollutionforth.Aimofthisstudj‘pretendandcontrolheavymetalspollusomecountermeasurestorcontrollingotheavymetalspollutionweresettorthAthi
此文档下载收益归作者所有