电化学法水处理新技术降解有机废水

:025322468(2000)220080205:X52:A,,(,200092):.5,Ti/SnO2+Sb2O3,1000mg/L2h,COD40mg/L,100%.COD,.COD.:;;Newtechniqueofelectrochemicalwatertreatmentelectrocatalyticoxidationofbio2refratoryorganismWUXingwu,ZHAOGuohua,GAOTingyao(NationalEngineeringResearchCenterforUrbanPollutionControl,TongjiUniversity,Shanghai200092)Abstract:Atechniqueofelectrochemicalwatertreatment,electrocatalyticoxidationofbio2refractoryorganism,wasinvestigatedex2perimentallysllected.TheTi/SnO+SbOelectrodewasselected.Whenthesimulatedwastewaterwithinitialorganicconcentra2tionabout1000mg/Lwastreatedfor2hours,CODdecreasedtobellow40mg/Landthedecolorrateofazoicdyewas100%.WiththeincrementofthecurrentdensitytheCODremovalrateincreased,butthecurrentefficiencydecreased.ServicelifeofTi/SnO2+Sb2O3electrodewasenlargedbyaddingnoblemetaltothesurfacelayer.Theexperimentalresultsshowedthattheoxygenevolutionpotentialandthetransmissioncoefficientoftheanodeplayimportantrolesforelectrocatalyticoxidationoforganism.Keywords:watertreatment;biorefractoryorganics;electrocatalyticoxidation:2000204210;:2000206226:(:59738150):(1952),,(),,,,,.,[1].,,,.70(ChemicallyModifiedElectrode,CME),,,,.CME,[2].CME,,,,.2020009ACTASCIENTIAECIRCUMSTANTIAEVol.20,SupplSep.,2000转载(OBu)4+HCl+C4H9OHTi/PdOPdCl2+HCl+C2H5OHTi/NiONiCl2+HCl+C2H5OHTi/SnO2+SbO2+XOSnCl45H2O+SbCl35H2O+XCl+C2H5OHTi/Ag2OAgNO3+H2OTi/PbO2Pb(NO3)2+HNO3+HF:Ti/SnO2+Sb2O3+XOTi/SnO2+Sb2O3.1.1,SnO2TiO2RuO2,,,[3].1.,:(1).,.(2).,..(3).,;;;,,,.,Ti/SnO2+Sb2O3Ti/RuO2+TiO2Ti/PdOTi/NiOTi/SnO2+Sb2O3+XON,Ti/Ag2OTi/PbO2P.1.2.,.500mg/L.Na2SO4,NaOHpH,.100mL.,.27cm2,0.5cm.i=20mA/cm2,I=0.54A,4.55.4V.30min.,.CODCr.,510nm.1.3Ti/SnO2+Sb2O3510COD2.,E.CODCODCOD.t,:18:中国科技论文在线:E,20mA/cm2;1SbTi/SnO2+Sb2O3CODFig.1EffectofSbcontentofTi/SnO2+Sb2O3electrodeonthetransmissioncoefficientandtheCODremovalrateformethylorange=CODFV8It1000100%(1),COD:COD(mg/L);F:;V:(L);t:(h);I:(A).2,Ti/SnO2+Sb2O3COD,E.,COD.,.,.,.,,.1.4,SbTi/SnO2+Sb2O32820中国科技论文在线(i=1mA/cm2)(vs.SHE)(i=20mA/cm2)(vs.SHE)Ti/SnO2+Sb2O3751.252.071.602.380.6110.257Ti/SnO2+Sb2O3+XO5301.222.001.652.420.5280.2254Ti/SnO2+Sb2O3+XOTable4ResultsofseveralkindsofwastewaterathighinitialorganicconcentrationafterTi/SnO2+Sb2O3+XOanodetreatment,minCOD,%,%6079.612098.912098.612099.37596.7100:500mg/L,1000mg/L;20mA/cm2,45cm2,pH12,CNa2SO4=10g/L2CODFig.4DependenceofCODremovalrateandthetransmissioncoefficientatdifferentcurrentdensitisnSb/nSn9.6Ti/SnO2+Sb2O3+XO,4.,2hCOD98%,COD40mg/L,.2200mg/L,i30minCODEOI.,COD,.,,COD,.1.5,5.,1kgCOD52kWh,44/kg(COD).,,,.38:中国科技论文在线(COD),/kg(COD)0.95.6224760.140.734.60.95.7222750.145.138.30.95.6214660.168.858.50.95.51.256180.1100.184.12(1).(2)510,Ti/SnO2+Sb2O3.(3);nSb/nSn9.011.0COD.(4)iCOD,.(5)1000mg/L2h,COD40mg/L,100%.:[1]KRjeshwar,etal.Electrochemistryandtheenvironment[J].JApplElectrochem,1994,24:10771091[2].[M].:.1993[3],,,.[M].:.1992[4].[D].:.19994820中国科技论文在线