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1、碩士論文太湖沉積物磷形態(tài)的空間分布研究摘要隨著社會(huì)經(jīng)濟(jì)的發(fā)展，太湖富營(yíng)養(yǎng)問(wèn)題日益突出，沉積物磷的內(nèi)源釋放是維持湖泊富營(yíng)養(yǎng)化水平的一個(gè)重要因素。評(píng)價(jià)太湖的污染狀況；研究沉積物中磷的內(nèi)源負(fù)荷、磷賦予形態(tài)以及潛在釋放能力等方面，對(duì)揭示湖泊富營(yíng)養(yǎng)化具有重要的意義。本文應(yīng)用淡水沉積物中磷形態(tài)的標(biāo)準(zhǔn)測(cè)定程序(SMT)，研究了太湖營(yíng)養(yǎng)水平不同的竺山湖、梅梁灣、東太湖、西部沿岸和湖心區(qū)5個(gè)湖區(qū)沉積物中磷形態(tài)分布及其垂向變化特征。并對(duì)不同磷形態(tài)與內(nèi)源磷釋放的關(guān)系進(jìn)行探討。評(píng)價(jià)結(jié)果發(fā)現(xiàn)，沉積物總磷的含量與其水體營(yíng)養(yǎng)水平相一致；
2、太湖營(yíng)養(yǎng)水平不同的5個(gè)湖區(qū)中，梅梁灣、竺山湖和西部沿岸處于中度富營(yíng)養(yǎng)化，東太湖和湖心區(qū)處于輕度富營(yíng)養(yǎng)化。研究結(jié)果表明，沉積物TP的變化范圍為：300．93～1018．48mg／kg。TP主要由NaOH．P、OP和HCl．P組成，口由NaOH．P和HCl一P組成。沉積物中TP與各形態(tài)磷相關(guān)關(guān)系較好，TP以口占絕對(duì)組分，而IP與NaOH．P呈顯著正相關(guān)。各湖區(qū)中沉積物的磷形態(tài)表現(xiàn)為空間差異較大，活性組分的差異要大于活性較差的組分?？傮w來(lái)說(shuō)，中度富營(yíng)養(yǎng)化湖區(qū)沉積物中NaOH．P和OP的含量高于輕度富營(yíng)養(yǎng)化湖區(qū)。N
3、aOH．P和OP的變化范圍為147．37～724．87mg／kg。這種潛在的磷負(fù)荷為藻類暴發(fā)提供了有利的條件。關(guān)鍵詞：富營(yíng)養(yǎng)化，沉積物，磷形態(tài)，垂向變化，相關(guān)關(guān)系A(chǔ)bstract碩士論文EutrophicationofTaihulakeisbecomingamajorwaterpollutionproblemwimconsequenceofdevelopmentofsocialeconomy．Theinternalreleaseofphosphorusfromsedimentplaysanimportant
4、roleinmaintainingeutrophicstatusinTaihulake．TheassessmentofTaihupollutionstatus，andtheknowledgeofinternalloading，phosphorusforms，andpotentialreleasewillthereforebeofsignificanceforfurtherstudyofmechanismsofeutrophication．Inthisstudy,thedistributionandverti
5、calvariationofphosphorusformsinthesedimentof5lakeregionsofZhushanlake，Meilianggulf,Eastlake，WestsidesandlakecenterofdifferenttrophiclevelsinTaihuLakewerestudied，applyingthestandardmeasurementandtest(SMT)procedureofphosphorusformsinthefreshwatersediment．Mor
6、eover,therelmionbetweenphosphorusformsandinternalreleaseofphosphoruswerediscussed．Theassessmentresultsshowedthattheconcentrationsoftotalphosphorusinthesedimentiscoincidedthecorrespondingtrophicleveloftheovedyingwater．Theresultsalsoshowedthatamongthe5lakere
7、gionsofdifferenttrophiclevelsinTaihuLake，Meilianggul￡ZhushanlakeandWestsidesweremeso—eutrophic，Eastlakeandlakecenterwereeutrohic．Theresultsshowedthatthetotalsedimentaryphosphorusrangedfrom300．93megkgto1018．48mg／kg．ThetotalphosphorusconsistedmainlyofNaOH—P，
8、OPandHCl-ETheinorganicphosphoru$consistedmainlyofNaOH—PandHCl一PThetotalsedimentaryphosphoruswashighlycorrelatedtootherphosphorusforms．Thedominantpoolofphosphorusistheinorganicform，WhileIPWassignificantlycorre
