从流域到河口钼从水体到沉积物的迁移富集过程分析

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1、万方数据convergencezone(20士3．5nM)．ThePearlRiVerislowerthanintheJiulongRiVertheBeijiang(13．7士5．7nT哪>协eDon舀iang(5．2士0．1n-田>theXijiang(4．5士1．7d～D．Bothnuxesofdiss01vedMointotheadjacentseaarerelativelyhigh：6．54×l05r110l／yrand2．85×105mol／)，rinthePearlandJiulongriVe

2、rsrespectiVely．MycasestudyintheXipiResen，ioraIldmeJiulngRiVersuggestedherethatsomeofMoexperiencedaseriesofgeochemicalreactionsincludingparticleadso叩tionandbi0109icaluptakewhich1edtoanetremovaloftheelementinthese矗eshwaters．Mystudyoftheestuariesshowedthatdi

3、ss01VedMocouldbenon-consen，atiVeinbothJiulongandPearlRiverestu撕es．111theJiulongriVerestuary，diss01VedMoconcentrationrallged矗om20nMto100nM．，a11ddissolVedMoisrelatiVelyconservativeinApril，Maya11dJune，butaslightremoValinFebrua叫，whileasli曲tremovalofdissolVedM

4、oalsooccurredinthePearlRiVerestIlaryiIlsummerbottomwater．MyfuI恤eriIlvestigationinmangroVesedimentsinthemiddleJiulongmVerestuarya11da110xicsuIfidicsedimentsintheupperPearlRiVerestuaryshowedthatm孤gmvesedimentsservedasanimportamsinkofMoasindicatedbypositiVec

5、orrelationsofsedimentaryM6withTOCandM-n．hladdition，Mo(V)wasobseⅣedintheanoxicsumdiczoneoftheupperPearlRiVerestIlary，suggestingMo(VI)iseXperiencmgareductiontoMo(VI)asfo皿ingsumdes．Again，hi曲1eVelsofc111。aandbacteriaintheupperPearl黜veresm{町couldbea哳ibutableto

6、hi曲leVelsofMo(V)alongwithllighImtrientsinputslocally．Hi曲ersedimemaUMoⅡlanparticulateMoiIlmewatercolumnsuggestedofanetsecluestrationoftheMo舶mwaterstothesediments，whilehigher1eVelsofdissolvedMoiIlthereducmgsedimemporewaterst11anintheoVerlyingwaterssuggested

7、ofanupwarddifmsionofdissolVedMof而msedimentporewaters．MystudyinthereducingsedimelltsalsoshowedmatMowaseXperiencedwithaseriesofgeochemicalreactionscoupledwithFe，T洫oxides，sulfldesandorganicmate“als．FiIlally，IconcludedthatIformefirsttime，obseⅣedwima1argespati

8、alvariabilityofMointhewatersheds，whichcouldbeattributabletolocalmmeactivities，a11dreseⅣoirconstructions，aIldbi0109icalactiVities，andeVenindustrialactivities．Inaddition，IalsoobseⅣedthatMocouldbemainlyseques仃atedintho