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1、硕士学位论文increasingmicrowavetemperaturefrom25°Cto85°CforCuandPb.Whenthetemperatureofslurrywas50°C,thereleaseefficiencyofCuandPbincreasedwithincreasingmicrowavetimefrom0minto6minandthenbecamestable.Thirdly,BCR(CommunityBureauofReference)sequentialextractione
2、xperimentsshowedthatthereisatightrelationshipbetweenthereleaseefficiencyofheavymetalsfromthesedimentandthechemicalspeciationinsediment.Intheprocessofchemicaloxidationofmicrowaveassistedhydrogenperoxidetreatingheavymetalsinsediment,thechemicalspeciationof
3、heavymetalsinsedimentsgreatlydeterminesthereleaseefficiencyofheavymetals.Microwaveassistedhydrogenperoxideoxidationtechnologycanlowerthecontentofheavymetalsinacidsoluble/exchangeable,reducible,andoxidizablerespectively,andhigherthecontentofheavymetalsinr
4、esidualform.Aftertreatmentbythisprocess,themetalsinthesedimenthavehigherstabilityandthuslowerrisktotheenvironment.Finally,themicrowaveassistedhydrogenperoxideoxidationtechnologyjustcansolvepartoftheheavymetalsharmandsomeheavymetalheavymetalsinsedimentsra
5、therthanalltheharmofheavymetalsinsediments.Forextremelyhighsedimentpollution(suchassedimentfromXiawanRiver),thistechnologycannotcompletelysolvetheproblem.Whileforothersedimentsamples,thistechniquecangreatlyreducethehazardsofheavymetals,butstillcannotsolv
6、eproblemofsomeheavymetals.ForthehighpollutionofheavymetalsCdandZn,theycannotbeaddressed.ForheavymetalsCu,PbandCr,thecontentarerelativelyhigh,andthistechnologycansolvetheproblemsofthisthreeheavymetalspollutioninsediment.Inbrief,thereleasebehaviorofheavyme
7、talsduringtreatmentofdredgedsedimentbythechemicaloxidationofmicrowaveassistedhydrogenperoxidewasinvestigatedinthisstudy.Themechanismsoftheheavymetalsreleaseandtheeffectofthischemicaloxidationprocessonheavymetalspeciationwerepreliminarilyexplored.Also,the
8、feasibilityofwhetherthischemicaloxidationtechnologycouldbeamethodtoremediatesedimentcontaminatedwithheavymetalswasevaluated,providingacasestudyforotherresearches.V微波协助双氧水对底泥重金属影响及底泥修复可行性分析Keywords:Sediment;Microwave;Hydrog
