汞污染土壤化学稳定化修复技术

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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北京化工大学硕士学位论文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目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．1汞的来源及环境化学特征⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．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态及迁移转化规律⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．31．3．1汞在土壤中的存在形态⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．31．3．2汞在土壤中的迁移转化规律⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯51．4生物对汞的吸收特性一固定效

8、率评价⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．71．4．1指示植物的选取⋯⋯⋯⋯⋯⋯⋯．．⋯．⋯⋯⋯⋯⋯⋯⋯⋯．71．4．2汞对生物的吸收特性研究进展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．81．5汞污染土壤稳定化概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯91．5．1汞污染治理方法概述⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯91．5．2化学稳定化研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．101．6稳定效率评价⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．121．6．1稳定效率表达方式一形态分析法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯