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*300384/。Zn、Pb、Cu40%、60%28dPb5.634、6.032mg/L5mg/L。40%。X799.5A1005－8206200901－0012－03LeachabilityofCementSolidifiedFormsforMedicalWasteIncinerationFlyAshWeiGuoxia,LiuHanqiaoTianjinInstituteofUrbanConstruction,Tianjin300384AbstractInordertocheckeffectofcementsolidificationformedicalwasteincinerationflyashFA,thesolidifiedformswithdifferentsettingtimeanddifferentFA/cementratioswereexaminedintermsofheavymetalsleachability.TheresultsshowedthatZn,PbandCuleachingconcentrationsofthesolidifiedformswerereducingwithdelayofsettingtime.Pbleachingconcentrationsofthesolidifiedformsincorporated40%FAand60%FAinsettingtimeof28dayswererespectively5.634and6.032mg/L,whichexceedtheleachingstandard(5mg/L).Ifcementdosageswasbelow40%byweighinthemixturesaccordingtoactualsolidificationprocessofdomesticwasteincinerationflyash,theleachingindexofheavymetalwouldnotmeetthelandfillrequirement.Keywordsmedicalwasteflyashcementsolidificationheavymetal*208060519732005CB7242062008-08-131-2Pb、Cd、Zn。3。13%～40%4-540％6-7。/。8/、。11.115t/d21100℃。、、、。FAflyash1。FA1。139、LOI31.2％。325#OPC2。1.2FAFA10%、20%、30%、40%、60%1SiO2/%CaO/%SO3/%Cl/%LOI/%Cu/(mg/kg)Pb/(mg/kg)Zn/(mg/kg)Ni/(mg/kg)20.615.312.112.331.28991147107611427EnvironmentalSanitationEngineeringVol．17No．1February17120092·12·1F10、F20、F30、F40、F603min40mm×40mm×40mm24h20±2℃、90%3、7、14、28d。－70～80℃4hEPA1311TCLPSO－LAARS4。3。22.13CaO·SiO2C3S、2CaO·SiO2C2S、3CaO·Al2O3C3A4CaO·Al2O3·Fe2O3C4AF。C-S-HettringiteAFt、AFm、C4AFH13、CaOH2AFt、C-S-H10。3、7、14、28dFA5TCLP1。1Zn、Pb、CuC-S-H2。F10、F20、F40、F603dZn、Pb、Cu7dC3S、C2SC-S-HC3AC4AFFriedel’sC3AAFt112AFt、C-S-H3d。15ZnFA4Zn10761mgpHpH8ZnZnOH2ZnOH212Zn2++2OH-→ZnOH2→2H++ZnO22-。ZnOH42-ZnOH53-C-S-HCaCaZn2OH6·2H2OTCLP。PbFAZnPb、pHPb。13pH12Pb2％SiO2CaONa2OAl2O3Fe2O3TiO2SO325.4053.800.248.892.020.313.68MgO4.56K2O0.78·13·17pH。CuPb。CuCuOH2Ca12。Cd、Cr、Ni3。。CdF6014、28d0.2mg/LCdCdCdOH2C-S-HCaOH2CaCdOH414。FANi。。2.21528dCd、Cr、Pb31、5、5mg/L。2FA28dTCLP。2、、CaOH2C-S-H。228dF40、F60Pb5.634、6.032mg/L5mg/L。FA40%70%。31Zn、Pb、Cu。240%、60％Pb5.634、6.032mg/L5mg/L。40％。1.J.2006122026-2032.2.J.2007284533-536.3.GB18595—2001S.2001.4EckeHSakanakuraHMatsutoTetal.State-ofthe-artTreatmentProcessesforMunicipalSolidWasteIncinetationResiduesinJapanJ.WasteManage20002041-51.5LombardiFMangialardiTPigaLetal.MechanicalandLeachingProp-ertiesofCementSolidifiedHospitalSolidWasteIncineratorFlyAshJ.WasteManage19981899-106.6.J.2005333326-329.7.J.2006262230-235.8.J.20062857-11.9.GB18485—2001S.2001.10GougarMLDScheetzBERoyDM.EttringiteandCSHPortlandCementPhasesforWasteIonImmobilizationaReviewJ.WasteManage1996164295-303.11RemondSBentzDPPimientaP.EffectsoftheIncorporationofMu－nicipalSolidWasteIncinerationFlyAshinCementPastesandMortarsIIMod－elingJ.CemConcrRes200232565-576.12LiXDPoonCSSunHetal.HeavyMetalSpeciationandLeachingBehaviorsinCementSolidified/stabilizedWasteMaterialsJ.JHazardMater2001A82215-230.13QiaoXCPoonCSCheesemanCR.TransferMechanismsofContam－inantsinCement-basedStabilized/solifiedWastesJ.JHazardMater2006B129290-296.14TashiroCTakahashiHKanayaMetal.HardeningPropertyofCe－mentMortarAddingHeavyMetalCompoundandSolubilityofHeavyMetalfromHardenedMortarJ.CemConcrRes197773283-290.15YinCYMatmudHShaabanM.Stabilization/slidificationofLead-contaminatedSoilUsingCementandRiceHuskAshJ.JHazardMater200613731758-1764.1973—。228dTCLP10100100050001100000F40F30F20F10F60CrCdZnPbCuNi/mg/m3·14·