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1、摘要ChemicalStabilizationofMercurycontaminatedSoilsAbstractMercurycontaminationinsoilsisincreasinglyunderenvironmentalconcern，asaresultofitshighhighlytoxic，persistentandbioaccumulation．Theprincipleofthechemicalstabilizationusedinsoilremediationisthatmerc
2、urycontaminatedinsoilstransformtothemoststablecompoundinsoils，byartificialmeansofchemicalstabilizers．Chemicalstabilizationiswidelyusedforremediationofsoilsduetochemicalreactionsandphysicalreactions．Inthispaper,Mercuryinsoilstransformintomercuricsulfide
3、whichisSOstablethatcanbeexistedinthesoilwithalongtime，becauseofchemicalstabilizationrepairtechniques．Moreover,themobilityandtoxicityofmercuryinsoiliSbecome10W．Evaluationofstabilizationofmercuryinsoilswasconductedbyinapartofexperiment．Ithasbeenindicated
4、thatTriticumaestivummainlyabsorbedthewatersolubleandexchangeablefractionofHgandboundtoironandmanganeseoxidesfractionHginsoils．Inaddition，Triticumaestivumisabletoabsorblittleofboundtocarbonatesfractionofrig，boundtoorganicmatterIII北京化工大學碩士學位論文fractionofH
5、gandresidualfractionofriginsoils．Theresultsworkasoneoftheefficientevaluationofstabilizationofmercuryinsoils．Insinglefactorexperimentsandorthogonalexperimentofstabilizationofmercuryinsoils，thethreefactorsarepH，amountofstabilizerandamountoforganicmatters
6、．Accordingtotheresultsofstabilityefficiency,bioavailabilityandleachingtoxicityefficiency,thebestconditionofstabilizationisS：H927，4．62％(organicmatterscontent)，andpH6．KEYWORDS：soils，mercury,chemicalstabilization，sodiumsulfide，evaluationofstabilization，sp
7、eciationanalysis，leachingtoxicityIV目錄第一章緒論??????????????????????????????．11．1汞的來源及環(huán)境化學特征???????????????．11．2汞污染的危害及土壤治理必要性???????????．．?．．21．3汞在土壤中的存在形態(tài)及遷移轉(zhuǎn)化規(guī)律???????????．31．3．1汞在土壤中的存在形態(tài)???????????????．31．3．2汞在土壤中的遷移轉(zhuǎn)化規(guī)律??????????????51．4生物對汞的吸收特性一固定效
8、率評價????????????．71．4．1指示植物的選取???????．．?．????????．71．4．2汞對生物的吸收特性研究進展?????????????．81．5汞污染土壤穩(wěn)定化概述????????????????91．5．1汞污染治理方法概述????????????????91．5．2化學穩(wěn)定化研究現(xiàn)狀???????????????．．101．6穩(wěn)定效率評價??????????????????．121．6．1穩(wěn)定效率表達方式一形態(tài)分析法??????????
