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1、中國(guó)環(huán)境科學(xué)2014，34(1)：246-252ChinaEnvironmentalScience海岸帶表層沉積物中磷的地球化學(xué)特征曲瑛璇，盛彥清，丁超鋒，孫啟耀(中國(guó)科學(xué)院煙臺(tái)海岸帶研究所，山東省海岸帶環(huán)境工程技術(shù)研究中心，山東煙臺(tái)264003)摘要：通過連續(xù)提取法對(duì)萊州灣主要入海河流及近岸海域表層沉積物中5種形態(tài)磷進(jìn)行了定量分析黠果表明，近海沉積物自生鈣結(jié)合磷含量(45．6％)高于河流(37．3％)，而鐵結(jié)合磷(Fe—P)含量(18．2％)卻低于河流(31．3％)．在近海，可交換或弱結(jié)合磷含量和粉砂比例呈正相關(guān)，表明該形態(tài)磷主要吸附于細(xì)粒粉砂．河流沉積物Fe—P與Fe濃度呈顯著正相關(guān)(P<
2、O．O1)，表明河流沉積物Fe—P分布受沉積物活性鐵含量的控制．河口處Fe—P普遍低于相應(yīng)河流，這可能與海相泥沙輸入及河口厭氧區(qū)硫酸鹽還原或硫化物累積有關(guān)．近海沉積物總可提取態(tài)磷平均濃度總體呈現(xiàn)出由海洋向河口方向遞減的趨勢(shì)．關(guān)鍵詞：沉積物；磷形態(tài)；萊州灣；分布特征；磷的連續(xù)提取法中圖分類號(hào)：X142文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1000—6923(2014)01—0246—07Gochemistrycharacteristicofphosphorusincostalsurfacesediments．QUYing-xuan，SHENGYan-qing。，DINGChao-feng，SUNQi-yao(
3、ResearchCenterforCoastalEnvironmentEngineeringTechnologyofShandongProvince，YantaiInstituteofCoastalZoneResearch，ChineseAcademyofSciences，Yantai264003，China)．ChinaEnvironmentalScience，2014，34(1)：246-252Abstract：FivefractionsofphosphorusinmarineandfluvialsurfacesedimentsofLaizhouBaywereinvestigatedbya
4、sequentialextractionmethod．Theresultsindicatedthattheauthigeniccalcium-boundphosphorus(ACa-P)inmarinesediments(average45．6"／o)washigherthanthat(average37．3"／o)influvialsediments，butiron-boundphosphorus(Fe-P)inmarinesediments(average18-2％)Waslowerthanthatinfluvialsediments(average31-3％)．Incoastalzone
5、，apos~iveco=elmionWasfoundbetweenexchangeableandlooselysorbedphosphorus(E&L-P)andsilt(grainsize)，indicatingthatE&L-PWasmainlysorbedontofineparticles．AsignificantcorrelationfP<0．01)WasobservedbetweenFe-PandFeconcentrationsinfluvialsediments，whichindicatesthedistributionofFe-PinfluvialsedimentsWasdete
6、rminedbyFeconcentration．TheFe-PconcentrationinestuarysedimemsWaslowerthanthatincorrespondingriversediments．Thismaybeattributedtotheinputofmarinesedimentsandthereductionofsulfateortheaccumulationofsulfideunderanaerobicsection(Fefixedbysulfide)．Themeanvaluesoftotalextractedphosphorusinsedimentspresent
7、sadecreasetrendfromofshoretoestuaries．Keywords：sediment；phosphorusforms；LaizhouBay；distributioncharacteristic；sequentialextractionmethodofphosphorus磷是重要的生源要素之一，也是導(dǎo)致水體富復(fù)雜．已有的研究表明，在渤海，通過沉積物一海營(yíng)養(yǎng)化的主要元素l1J
