太湖北部湾沉积物有机氯农药残留特征及评价.pdf

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1、农业环境科学学报2010，29(3)：551—555JournalofAgro—EnvironmentScience太湖北部湾沉积物有机氯农药残留特征及评价计勇1，一，陆光华1，秦健1，吴昊1(1．浅水湖泊综合治理与资源开发教育部重点实验室，河海大学环境科学与工程学院，南京210098；2．南昌工程学院水利工程系，南昌330099)摘要：采用GC—ECD联用检测技术分析了太湖北部贡湖大贡山(1号点)、小贡山(2号点)与梅梁湖马山(3号点)、拖山(4号点)不同季节有机氯农药中4种HCHs同系物及4种DDTs同系物含量。结果表明，含量最

2、高的为1一HCH与DDT，分别占总量的45％以上，其次是B—HCH与DDD，而O，p-DDE基本未检出。不同监测点表现出了季节变化，受“引江济太”调长江水入太湖的影响，贡湖中1号与2号监测点夏季OCP总量高于其他季节，而梅梁湖受周围生产及竺山湖大桥入污影响，3号监测点不同季节OCPs总量变化不显著，4号监测点冬季高于春季，夏季受高温影响，OCPs总量出现最小值。采用生态风险值对沉积物中OCPs进行风险评价，太湖北部湾沉积物中OCPs总量较低，尚未对生态构成严重威胁，但由于这类物质的生态累积效应，其潜在危害仍不容忽视。关键词：太湖；有

3、机氯农药；沉积物；生态风险中图分类号：X592文献标志码：A文章编号：1672—2043(2010)03—0551—05TheDistributionandIUskAssessmentof0rganochlorinePesticidesinSurfaceSedimentofTaihuJIYon91’，LUGuang-hual，QINJianl，WUHa01(1．KeyLaboratoryforIntegratedRegulationandResourcesDevelopmentonShaHowLakes，MinisuyofEduca

4、tion，CollegeofEnvironmentalScienceandEngineering，HohaiUniversity，Nanjing210098，China；2．DepartmentofIrrigationWorkEngineering，NanchangInstituteofTechnology，Nanchang330099，China)Abstract：ThecontentsoffourHCHscongenem(仅一HCH，B—HCH，吖一HCHand8-HCH)andfourDDTscongeners(P，P—DDE

5、，P，P—DDD，P，P-DDTandO，P-DDE)inthesedimentsofGongBay(LargeGongshan，1“andSmallGongshan，2耐)andMeiliangBay(Mashan，3dandTu-oshan．4“)inthenorthernofTaihuweredeterminedindifferentseasonsbyusingGC-ECDdetectiontechnology．Thecontentsofy-HCHandDDTwerethehighest，accountingfor45％oft

6、otalOCPs，followedbyB—HCHandDDD，andO，P—DDEwerenotdetectedinthesediments．TheOCPscontentsindifferentsitesshowedaseasonalvariation．ThetotalOCPsofthe14and2甜sitesinsummerwerehigherthanthoseintheotherseasonsduetotheimpactofdivertingwaterfromYangtzeRiver．However，thetotalOCPsdi

7、dnotchangesignificantlyindifferentseasonsinthe3“siteinfluencedbysurroundingproductionandpollution．TheconcentrationsofOCPswerehigherinwinterthaninspringandsummerinthe4。site．TheriskassessmentwascompletedonOCPsinthesedimentsbyusingtheecologicalriskvaluemethods．Althoughthe

8、lowtotalcontentsofOCPsinthesedimentsofnorthernTaihuhavenotconstitutedaseriousthreattotheecologicalsystem，thepotential