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©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,300071):,CuO2CeO2/2Al2O3,XRDSEMCuO2CeO2/2Al2O3,pH,15.0VpH0108m3/h310cm,CODNH+42N9317%100%,,20,70%,;NH+42N:;;;:X703:2007207223:,1980,E2mail:yuelintj@126.com,,,,,[123](bipolarpackedbedcell,BPBC)[426],BPBC,,,,CuO2CeO2/2Al2O3,,[729],DSA(dimensionallystableanodes)[10],,OH,[11]1111,,,,,11Table1WaterqualityofexperimentalleachateTOC/(mg/L)550700CODCr/(mg/L)17002000BOD5/(mg/L)150400(NH+42N)/(mg/L)15001800(Cl-)/(mg/L)44004700pH89/12001400112FEIQuanta2000Rigaku2D/Max22500X2CODCOD;NH+42N(GB74791987);pHMettlerToledo320113CuO2CeO2/2Al2O39%(,),©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(NO3)2,24h,10510h,4004h,CuO2CeO2/2Al2O31XRDFig.1XRDpatternsofthedifferentcatalysts1144IrO22TiO2/Ti,,610cm1210cm100mL11GAC(,23mm,34mm)CuO2CeO2/2Al2O3(,34mm,260300m2/g),,,350mL(pH710),,,,,180min2211CuO2CeO2/2Al2O312Al2O3CuO2CeO2/2Al2O3XRD1,a23715451967143,2Al2O3;b,CeO2,CeO2,2815331347165615,CuO,CuOCeO2/2Al2O3,CuOCeO223000,2Al2O3(2a),,(2b),CuO2CeO2/2Al2O3,,;,CeO2,CuO,,2Fig.2SEMimagesofthedifferentcatalysts21221211ms,m,,m;,,,pH310cm0108m3/h,180min,,3,,,CODNH+42N15V,CODNH+42N9317%0952007©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:1510V,0108m3/h,180min2,,20,,,COD70%,NH+42N1715%,90min,1510V,CODNH+42N60415mg/L26215mg/L,22816kWh/m3,,,,,,3,IrO2,,OH:2H2O-2e2OH+2H+(1),H2O2,:O2+2H++2eH2O2(2),Cu2+H2O2,OH,CuO:CuO+H2O2CuO++OH-+OH(3),Cl-,Cl-,Cl2,HClO,HClOCODNH+42N:2Cl-Cl2+2e(4)Cl2+H2OHClO+H++Cl-(5),,;NH+42N:NH3+3OH-12N2+3H2O+3e(6)2NH+4+3HClON2+3H2O+5H++3Cl-(7)4(1)CuO2CeO2/2Al2O3,,,,CODNH+42N90%(2),,,;pH,,NH+42N,COD;,2952007©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3),20,COD70%,NH+42N1715%;NH+42N:[1]OMANC.Identificationoforganiccompoundsinmunici2pallandfillleachate[J].EnvironmentalPollution,1993,80(3):265-2711[2]WANGBaozhen.Apilotstudyonthetreatmentofhighstrengthsanitarylandfillleachate[J].EuropeanWaterPollutionControl,1997,7(6):33-401[3]WISZNIOWSKIJ,ROBERTD,SURMACZ2GORSKAJ,etal.Landfillleachatetreatmentmethods:areview[J].EnvironmentalChemistryLetter,2006,4:51-61.[4],.[J].,1994,15(2):38-401[5]XIONGYa,KARLSSONHT.Anexperimentalinvesti2gationofchemicaloxygendemandremovalfromthewastewatercontainingoxalicacidusingthree2phasethree2dimensionalelectrodereactor[J].AdvancesinEnviron2mentalResearch,2002,7:139-145.[6]KONGWuping,WANGBo,MAHongzhu,etal.Elec2trochemicaltreatmentofanionicsurfactantsinsyntheticwastewaterwiththree2dimensionalelectrodes[J].JournalofHazardousMaterialsB,2006,137:1532-15371[7],,,.Mn2Sn2Sb/2Al2O3[J].,2006,64(3):235-2391[8]GUNNARRD,STANLEYHL.ComparisonsofE2bonex(r)andgraphitesupportsforplatinumandnickelelectro2catalysis[J].ElectrochemActa,1998,44(2):437-4441[9],,,.2[J].,2006,29(8):93-95.[10]KIMKW,KIMYJ,KIMIT,etal.TheelectrolyticdecompositionmechanismofammoniatonitrogenatanIrO2anode[J].ElectrochimicaActa,2005,50:4356-4364.[11]SANTOSMRG,GOULARTMOF,TONHOLOJ,etal.Theapplicationofelectrochemicaltechnologytotheremediationofoilywastewater[J].Chemosphere,2006,64:393-399.TreatmentoflandfillleachatebyanelectrocatalyticoxidationprocessYUELinWANGQiShanWANGYuHengSHIYan(CollegeofEnvironmentalScienceandEngineering,NankaiUniversity,Tianjin300071,China)Abstract:ByreplacingtheconventionalinsulatingmaterialinabipolarpackedbedcellwithaCuO2CeO2/2Al2O3catalyst,heterogeneouscatalyticreactionscanbecarriedoutinanelectrochemicalreactor.Themorpholo2gyandmicrostructureofthecatalystwerecharacterizedbyscanningelectronmicroscopyandX2raydiffraction.Theeffectsofvaryingcellvoltage,pH,airflowandelectrodespanonthetreatmentoflandfillleachatewerein2vestigated.Theresultsindicatedthatthereactorhadabeneficialeffectonthedegradationoflandfillleachate.Undertheconditionsofanappliedvoltageof1510V,pHof710,airflowof0108m3/h,andanelectrodespanof310cm,theremovalefficienciesofCODandammonia2nitrogen(NH+42N)reached9317%and100%,respec2tively.Inaddition,theelectrocatalyticsystemwasstableandtheremovalefficienciesofbothCODandNH+42Nremainedabove70%evenafterthereactorwasruntwentytimes.Itwasshownthattheelectrocatalyticoxida2tionresultsinrefractoryorganics