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《長(zhǎng)江口及其鄰近海域沉積物重金屬分布特征和環(huán)境質(zhì)量評(píng)價(jià)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。
1、第29卷第9期環(huán)境科學(xué)Vol.29,No.92008年9月Sep.,2008ENVIRONMENTALSCIENCE長(zhǎng)江口及其鄰近海域沉積物重金屬分布特征和環(huán)境質(zhì)量評(píng)價(jià)123122盛菊江,范德江,楊東方,齊紅艷,徐琳(11上海水產(chǎn)大學(xué)生命學(xué)院,上海200090;21中國(guó)海洋大學(xué)海洋地球科學(xué)學(xué)院,青島266100)摘要:利用等離子質(zhì)譜儀(ICP2MS)測(cè)定了長(zhǎng)江口及其鄰近海域表層沉積物細(xì)顆粒組分(<63μm)的重金屬,平均含量為As-1-1-1-1-1-110147mg·kg、Cd0119mg·kg、Cu37168mg·kg、Pb36186mg·kg
2、、Cr97180mg·kg、Zn98165mg·kg1空間分布上,As、Cd和Cu含量隨著離岸距離的增大有遞減的趨勢(shì),Pb、Cr和Zn含量變化不顯著,調(diào)查海區(qū)南部海域的重金屬含量普遍比北部海域高.單因子污染評(píng)價(jià)顯示,調(diào)查海域底質(zhì)局部已經(jīng)受到了As、Cu、Pb、Cr和Zn的中度污染,而Cd的影響較輕微.依據(jù)沉積物質(zhì)量基準(zhǔn)(SQGs)對(duì)本區(qū)沉積物環(huán)境質(zhì)量評(píng)價(jià)表明,大部分站位As、Cu和Cr3種重金屬的含量位于效應(yīng)濃度低值(ERL)和效應(yīng)濃度中值(ERM)之間,只是偶爾產(chǎn)生不利的生物效應(yīng);Cd、Pb、Zn3種重金屬的含量都低于ERL或大部分站位低于ERL
3、,幾乎不會(huì)產(chǎn)生不利的生物效應(yīng).對(duì)底質(zhì)綜合環(huán)境質(zhì)量進(jìn)行的因子分析和系統(tǒng)聚類分析結(jié)果顯示,長(zhǎng)江口外和杭州灣外近海海域的綜合底質(zhì)環(huán)境較差,應(yīng)引起重視.關(guān)鍵詞:長(zhǎng)江口;表層沉積物;重金屬;環(huán)境評(píng)價(jià)中圖分類號(hào):X142;X820文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):025023301(2008)0922405208DistributionPatternsofHeavyMetalsinSurfaceSedimentsoftheYangtzeEstuaryandItsAdjacentAreasandEnvironmentalQualityAssessment12122SHEN
4、GJu2jiang,FANDe2jiang,YANGDong2fang,QIHong2yan,XULin(11CollegeofLifeScienceandTechnology,ShanghaiFisheriesUniversity,Shanghai200090,China;21CollegeofMarineGeoscience,OceanUniversityofChina,Qingdao266100,China)Abstract:Theconcentrationsofsixheavymetalsweredeterminedinthefinefra
5、ction(<63μm)ofsurfacesedimentsintheYangtzeEstuaryanditsadjacentareasbyaninductivelycoupledplasmamassspectroscopy(ICP2MS).TheaveragecontentsofAs,Cd,Cu,Pb,CrandZnare-110147,0119,37168,36186,97180and98165mg·kg,respectively.ThecontentsofAs,CdandCuappeargraduallydegressivefromwestt
6、oeast,whilethecontentsofPb,CrandZnappearnoapparentdifference.Ingenerally,theconcentrationsofheavymetalsarehigherinthesouthseaareasthanthoseinthenorthseaareas.EnvironmentalassessmentwithsinglefactormethodsuggeststhatAs,Cu,Pb,CrandZnaremoderatelycontaminated,whileCdisnotpolluted
7、.ThevaluesofAs,CuandCrarebetweeneffectrange2low(ERL)andeffectrange2median(ERM),whichindicatetheyoccasionallybringadversebiologicaleffectatmoststations,andthevaluesofCd,PbandZnarebelowERLmeantheyrarelybringadversebiologicaleffectbysedimentqualityguidelinesassessment.Fromtheresu
8、ltsoffactoranalysisandclusteranalysis,weconcludethattheouters
