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时间:2019-05-29
《武汉典型湖泊沉积物中重金属累积特征及其环境风险》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、LakeSci.(湖泊科学),2009,21(1):61.68http://www.jlakes.org.E-mail:jlakes@niglas.ac.ca~2009byJournalofLakeSciences武汉典型湖泊沉积物中重金属累积特征及其环境风险唐阵武1,2,程家丽,岳勇2,3,陈玉敏(1:华北电力大学能源与环境研究中心,北京102206)(2:水环境模拟国家重点实验室,北京师范大学环境学院,j匕京100875)(3:中围石油集团安全环保技术研究院,北京100083)摘要:采集武汉市8
2、个典型湖泊的表层沉积物,分析11种重金属的含量及其不同形态组成,研究了,不同湖泊金属元素的富集与污染程度,探讨了沉积物中重金属的污染来源及其潜在生态风险.结果表明,沉积物中重金属cd累积最严重,zn和Hg也发生明显累积.龙阳湖污染较重,南太子湖和墨水湖污染中等,其它湖泊污染总体较轻.沉积物性质对重金属累积的影响不显著.城市I.业活动强烈影响着重金属的分布.不同重金属的形态分布差异较大,cd生物可利f}】态含量最高,其次为Mn、Zn、Co、Cu和Pb:而sb和Hg以残留态占绝对优势,生态风险较小.相关
3、分析和主成分分析表明,化石燃料燃烧、金属冶炼等是武汉市湖泊沉积物中重金属来源的主要贡献者,同时岩石风化等地球化学过程也影响着重金属的污染.关键词:湖泊沉积物:重金属地累积指数;形态;主成分分析;武汉AccumulationsandrisksofheavymetalsinthesedimentsfrOm8typicallakesinWuhanChinaTANGZhenwu一.CHENGJiali。YUEYong·3&CHENYumin(1:Energ3,andEnvironmentalResearch
4、Center,NorthChinaElectricPowerUniversi~,Beij'ing102206,PRChina)(2:StateKe),Laborator)oJWaterEnvironmentSimulation,SchoolofEnvironment,BeringNormalUniversit.y,Bering100875PRina1f3:InstituteofSafeO,andEnvironmentProtectionTechnologyofChinaNationalPetrole
5、umCorporation,Beijing100875,PRChina)Abstra~:Thecontentandspeciesof11heavymetalsinsurfacesedimentsfrom8typicallakeslocatedinWuhan,China,wereinvestigated,andtheaccumulation,contamination,potentialecologicalrisksandpossiblesourcesofmetalswerediscussedinth
6、ispaperAccordingtothemetalgeoaccumulationindexes,theresultsshowedthatthelakesedimentshadheavilypollutedbyCdandex,identlybyZnandHgOnthewhole,heavypollutionsofmetalswereobservedinLakeLongyangandmediumpollutioninLakeNantaiziandLakeMoshui,whereastheslightp
7、ollutioninotherlakes.DistributionofmetalsinsedimentswasobservedtobenotsignificantcorrelationwithphysicOchemicalpropertiesofsediments,whereasdistinctlyinfluencedbyurbanindustries.11metalsdistributeddiferentlyinlakesediments.Thelargestpercentageoftheform
8、ofavailablespeciationwasCdinthelakesediments,withmuchhigherpotentialecologicalhazards,followedbyMn,Zn,Co,CuandPb.Incontrary,As,SbandHgweredominantlyassociatedwiththeresidualfraction,indicatingrareadversebiologicaleffects.Correlationanal
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