资源描述：
《太湖五里湖水域背角无齿蚌中汞的残留》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、太湖五里湖水域背角无齿蚌中汞的残留农业环境科学2009,28(2):411-415JournalofAgro-EnvironmentScience太湖五里湖水域背角无齿蚌中汞的残留刘洪波,杨健,甘居利2(1.中国水产科学研究院内陆渔业环境与资源重点开放实验室,中国水产科学研究院淡水渔业研究中心,江苏无锡214081;2.中国水产科学研究院南海水产研究所,广东广州510300)摘要:作为建立淡水环境下持久性污染物"背角无齿蚌观察"体系的又一尝试,利用NIC汞分析仪(MA-2000型)对采自太湖污染最严重水域——五里湖代表样点的背角无齿蚌(Anodontawoodiana)及用
2、于对照的底泥中重金属汞的残留进行了测定.结果显示,汞在背角无齿蚌和底泥样本中的浓度平均值分别为0.005mg?kg干重和0.135mg?kg干重;浓度范围分别为0.000~0.011mg?kg干重和0.0630.227mg?kg-一干重.蚌样和底泥样本中汞的残留浓度均明显低于国家相关的食品卫生(GB2762--1994),限量标准(NY5073--2001),或农用淤泥(GB4284--1984),土壤环境质量(GB15618--1995)标准.另外,底泥样本中汞的地积累指数(Igeo)仅为一1.96.两类样本中汞的残留状况一致反映出目前太湖五里湖水域汞的污染程度很低.近年
3、来五里湖全湖水域的清淤工程应该是导致这种现象的原因.不同样点汞浓度的地理差异仅在底泥样本中达到显着水平.关键词:监测;背角无齿蚌;汞;残留;五里湖;太湖中图分类号:X835文献标志码:A文章编号:1672—2043(2009)02-0411-05ResiduesofMercuryintheBivalveMusselsAnodontawoodianafromtheWulihuAreaoftheTaihu,ChinaLIUHong—bo',YANGJian,GANJu—li(1.KeyLaboratoryofEcologicalEnvironmentandResourcesof
4、InlandFisheries,FreshwaterFisheriesResearchCenter,ChineseAcademyofFisheryScience,Wuxi214081,China;2.SouthChinaSeaFisheriesResearchInstitute,ChineseAcademyofFisheryScience,Guangzhou510300,China)Abstract:TheTaihuisthethirdlargestfreshwaterlakeinChina,anditswatershedisoneofthemostdevelopedreg
5、ionsofChinaforagriculture,industryandcommerce,playingacriticalroleonwatersupply,tourism,fisheryandnavigation.Aspartofapilotstudyof"FreshwaterMusselWatch"onpersistenttoxicsubstances,residuesofmercury(Hg)inthesofttissuesofeighteenbivalvemussels(Anodontawoodiana)andsedimentsamplescollectedfro
6、mWnlihuareaoftheTaihu(themostpollutedareainthelake)wereanalyzedbyaNICAutomaticMercuryAnalyzer/MA-2000.TheresidualHglevelsofthemusselsweredetectedandranged0.000~0.01lmg?kg一dryweightwithanaverageof0.005mg?kg～dryweight.TheHgdetectionrateforthemusselswas83%.Thoseofthesedimentsamplesranged0.063
7、-O.227mg?kg一dryweightwithanaverageof0.135mg?kg—aryweight.HglevelsofthemusselsandsedimentsweresignificantlylowerthanthecorrespondingnationalstandardsforlimitofHginfoods(GB2762--1994andNY5073--2001),andsludges(GB4284--1984)orsoils(GB15618--1995),respectively.Add
