锰氧化物改性活性炭去除空气中甲醛_周昕彦

912Vol．9No．12201512ChineseJournalofEnvironmentalEngineeringDec．2015*200237MnOx/GAC。MnOx/GAC。MnOx/GAC。0.98%380℃MnOx/GAC1。MnOx/GAC。MnOx/GAC。MnOx/GAC。X701A1673-9108201512-5965-08MnOx/GACforremovalofformaldehydeinairZhouXinyanZhangPengJiangWenYangYitaoLinLiliZhangWeiStateEnvironmentalProtectionKeyLaboratoryofEnvironmentalＲiskAssessmentandControlonChemicalProcessSchoolofＲesourcesandEnvironmentalEngineeringEastChinaUniversityofScienceandTechnologyShanghai200237ChinaAbstractMnOx/GACsamplesweresynthesizedthroughimpregnatingmanganeseoxideongranularactiva-tedcarbontoimproveitsremovalcapacityforformaldehydeintheair．Seriesofbatchexperimentswereconduc-tedtoinvestigatetheeffectsofpreparationconditionandenvironmentalfactorsontheremovalcapacityofMnOx/GACforformaldehyde．TheresultshowedthattheremovalabilityofMnOx/GACforformaldehydewasimprovedsignificantlycomparedtotheGACcarrier．MnOx/GACwith0．98%MnOxcalcinedunder380℃hasthebestremovalcapacitywhichincreasedbynearlytwiceofitsGACcarrier．FruitshellbasedGACisabettercarrierthancoconutshellbasedGACduetoitslargeraverageporesize．MnOx/GAChassustainableformaldehydere-movalabilitybecausethemanganeseoxidecancatalyticallydegradetheformaldehydeadsorbedonMnOx/GACsurface．Certainenvironmentfactorssuchaslowertemperatureandhumiditywouldimprovetheremovalprocess．KeywordsformaldehydeactivatedcarbonMnOxmodificationadsorptioncatalysis201310251065412013022014－10－222015－02－031993—。[e-mail]*[e-mail]。2～510012。、、、、、3。2002—20040.1mg/m369.4%4。、、、、5。6。78。。Mn3O4910。MnOx/GAC91≤x≤2。、MnOx/GACMnOx/GAC、。11.120～40、、0.75m×0.75m×1.00mQC-2751/ICP-AESAgilent725ESBETTriStarII3020SEMHi-tachiS-3400NXD/MAX2550VB/PCXＲDCuKaλ=0.154056nm2θ10°～80°MicromeriticsAuto-ChemII2920。1.21.2.1MnOx/GAC100mL。40h。80℃。24h10minMnOx/GAC。MnCH3COO2·4H2O→MnOx+CO2+H2O11.2.235%～40%24h50mg/m3。、11。。GB/T15516-1995。22.1MnOx/GAC2.1.1MnOxMnOxMnOxMnOx/GACMnOxMnO2。1MnOx。MnOx4.8%MnOx13.0%10.3%5.2%。、。1MnOx/GACTable1TheoreticalandactualMnOxcontentofMnOx/GACsamples%0.500.490.430.990.980.874.84.64.613.010.35.22.1.2SEM1MnOx0.98%MnOx/GAC。MnOx/GACMnOx。MnOx。1MnOx/GACSEMFig.1SEMphotomicrographsofMnOx/GACsamples2.1.3XＲD2MnOx0.98%669512MnOx/GACXＲD。MnOxMnOMn3O440°25°MnO220°～50°1213。MnOx/GACGAC。MnOx/GACMnOxMnOx14。0.98%2MnOx/GACGACXＲDFig.2XＲDdiagramsofGACandMnOx/GACsamples2.1.4MnOx/GACBET。23MnOx/GAC。2MnOxBET450℃25%。。450℃。3MnOx/GACBET。2MnOx/GACBETTable2BETdataofMnOx/GACshellunderdifferentcalcinationtemperatures℃MnOx%cm3/gBETm2/g1500.550.477642500.600.487953800.790.538104500.920.547933MnOx/GACBETTable3BETandporositydataofMnOx/GACcoconutwithdifferentMnOxcontentsMnOx%cm3/gBETm2/g0.430.539540.870.549354.60.528675.20.467952.1.5H2-TPＲMnOx/GACH2-TPＲ。MnO2Mn2O3→Mn3O4→MnO。MnOx312327417℃MnO2Mn2O3Mn3O43510℃Mn3O4MnO115。3150250℃400～500℃22MnOx/GACMnO2Mn2O3。380℃400～500℃550～600℃3380℃Mn3O4。Mn3O416。。3MnOx/GACTPＲFig.3TPＲdiagramsofMnOx/GACatdifferentcalcinationtemperatures769592.22.2.1MnOx/GAC0.71%MnOx/GAC。150、250380℃MnOx/GAC28℃0.5L/min50mg/m3。47h。380℃MnOx/GAC150℃20hC/C0150℃250℃。2H2-TPＲ380℃BET3。MnOx0.79%2Mn3O4Ahmed10Mn3O4。MnOx/GAC。380℃。4MnOx/GACFig.4FormaldehyderemovalcurvesofMnOx/GACatdifferentcalcinationtemperatures2.2.2MnOx/GAC0.99%MnOx/GAC380℃。MnOx/GAC25℃0.5L/min50mg/m3。5MnOx/GACC/C083%。。BETMnOx/GAC0.64cm3/g0.54cm3/g。MnOx/GAC。5MnOx/GACFig.5FormaldehyderemovalcurvesofMnOx/GACwithdifferentactivatedcarbonsupport2.2.3MnOxMnOxMnOx/GACMnOx0.49%、0.98%、4.59%10.28%MnOx/GAC。MnOx/GACMnOx。25℃0.5L/min50mg/m3。6a。2h0.98%MnOx/GAC6hMnOx/GAC。MnOx/GAC。11hMnOx0.49%、0.98%、4.59%10.28%MnOx/GAC12.56、16.06、23.76、21.4114.35mg/g6b。4MnOx/GAC0.98%MnOx/GAC1。869512MnOx/GAC。1MnOx。MnOxMnOx2。MnOxMnOxMnOx/GAC1217。6MnOx/GACFig.6FormaldehyderemovalcurvesandremovalcapacityiesofMnOx/GACwithdifferentMnOxcontents2.3MnOx/GACMnOx/GAC0.5gGAC0.98%MnOx/GAC15℃。7abGACMnOx/GAC。GAC112h57.32mg/m345.52mg/m3GAC。23。MnOx/GAC112h56.92mg/m337.48mg/m3。MnOx/GAC。249.08mg/m352.12mg/m3。GACMnOx/GAC。MnOx/GAC。7GACMnOx/GACFig.7FormaldehydecontinuousremovalcurvesofGACandMnOx/GACMnOx/GACMnOx。18。MnOx。MnOx/GAC2O2MnO→xO2+2·O2HCHO+·→OCO2+2·H32·H+·→OH2O4CO+·→HC—OH5969592.42.4.1MnOx/GACMnOx0.98%。8aMnOx/GAC10℃＞15℃＞20℃＞25℃。11hMnOx/GAC28.65、25.33、24.0123.76mg/g。10℃MnOx/GAC8b。MnOx/GAC。MnOx/GAC18。MnOx/GAC。8MnOx/GACFig.8FormaldehyderemovalcurvesandremovalcapacitiesofMnOx/GACatdifferenttemperatures2.4.2MnOx/GACMnOx0.98%10℃。9a0%11hC/C00.55。。9b11h65%、50%、35%0%MnOx/GAC17.12、25.20、26.3428.65mg/g。192021。22-242526MnOx/GAC。9MnOx/GACFig.9FormaldehyderemovalcurvesandadsorptioncapacitiesofMnOx/GACunderdifferenthumidity31。079512MnOx/GAC。380℃MnOx/GAC。MnOx/GAC。40.98%MnOx/GAC23.76mg/g1。2MnOx/GAC。55mg/m3MnOx/GAC。。3、MnOx/GAC。MnOx/GAC。1ZhangLuopingSteinmausC．EastmondD．A．etal．FormaldehydeexposureandleukemiaAnewmeta-analysisandpotentialmechanisms．MutationＲesearch/ＲeviewsinMutationＲesearch20096812-3150-1682．．2004343-45WangGuodongLiKelinLiDeliang．Indoorairformalde-hydepollutionandthecontrollingmeasuresduringhousedecoration．EnvironmentalScienceTrends2004343-45inChinese3ChinP．YangL．P．OllisD．F．Formaldehyderemovalfromairviaarotatingadsorbentcombined