Removalofammonia-nitrogenfromlandfillleachatebyelectro-catalyticoxidationprocessYueLin1,WangQishan2,GuoJianbo1,LuoXiao1(1.CollegeofEnvironmentalScienceandEngineering,HebeiUniversityofScienceandTechnology,Shijiazhuang050018,China;2.CollegeofEnvironmentalScienceandEngineering,NankaiUniversity,Tianjin300071,China)1,2,1,1(1.,050018;2.,300071)[]CuO-CeO2/γ-Al2O3,。、pH、(NH4+-N),。15.0V、pH=7、0.08m3/h、3.0cm,180min,NH4+-N95%。,NH4+-N。,0.1070.524。[];;;[]X703.1[]A[]1005-829X(2010)10-0052-04Abstract:CuO-CeO2/γ-Al2O3heterogeneouscatalysthasbeenusedforreplacingtheinsulationmaterialofthebipolarpackedbedcell,soastoestablishanewelectro-catalyticoxidationsystem.Theeffectsoftheinfluentialfac-tors,suchascellvoltage,pH,airflowandelectrodespanontheremovalefficiencyofammonica-nitrogen(NH4+-N)fromlandfillleachateareinvestigated,andappropriatereactingconditionsareconfirmed.WhenpHoflandfillleachateis7,cellvoltage15.0V,aeratedosage0.08m3/h,andelectrodespan3.0cm,theremovalrateofammo-nia-nitrogencanreachover95%.Theelectro-catalyticoxidationdegradationofthelandfillleachateisanalyzedbykinetics.ItisfoundthattheremovalofNH4+-Naccordswiththepseudo-first-orderequationofkinetics.Moreover,thebiodegradabilityoftheeffluentshasbeenimprovedfrom0.107to0.524afterthetreatment.Keywords:landfillleachate;electro-catalyticoxidation;catalyst;ammonia-nitrogen[](50978082)〔1〕。,NH4+-N。NH4+-N,,〔2〕。〔3-5〕。(BPBC)〔6〕,BPBC,,。,。,〔7-8〕。,,DSA。,DSA,,〔9〕。3010201010IndustrialWaterTreatmentVol.30No.10Oct.,201052--2010-10,30(10),CuO-CeO2/γ-Al2O3,,DSA,,NH4+-N。11.1,,,,1。1TOC/(mg·L-1)CODCr/(mg·L-1)BOD5/(mg·L-1)NH4+-N/(mg·L-1)Cl-/(mg·L-1)pH/550~7001600~2000150~4001400~18004400~47008~91200~14001.2CuO-CeO2/γ-Al2O3。9%,CeO2/γ-Al2O3,105℃10h,400℃4h。,2%Cu(NO3)2,24h,105℃10h,400℃4h,CuO-CeO2/γ-Al2O3。1.31,、、4。DSA,,:6.0cm×12.0cm。125mL、1∶1(D2~3mm,,3~4mm)CuO-CeO2/γ-Al2O3(D3~4mm,,260~300m2/g)。CuO-CeO2/γ-Al2O3,。,,pH(350mL)。,,。,。NH4+-N(GB7479—1987);pHMETTLERTOLEDO320;BOD5HACHBODTrak。22.1CuO-CeO2/γ-Al2O3XRDγ-Al2O3XRD,2。2,γ-Al2O32θ37.5°、45.9°、67.4°3,γ-Al2O3。CuO-CeO2/γ-Al2O3XRDCeO2,CeO2,28.5°、33.3°、47.6°56.5°,CuO,CuOCeO2/γ-Al2O3。2.2pH=7、3.0cm、0.08m3/h,NH4+-N,3。3,5.0V,,,(GAC),NH4+-N。,NH4+-N。,,;,,·OHCl2、HClO,:53--2010-10,30(10),,NH4+-N。15.0V,NH4+-N95%。,,,,;。,15.0V。2.3pH15.0V、3.0cm、0.08m3/hpHNH4+-N。,NH4+-N,。NH4+-N;Cl-,Cl2HClO,HClONH4+-N。,,pHCuO-CeO2/γ-Al2O3。H+OH-。,,NH4+-N,。2.4,,--。,,O2,H2O2,。15.0V、3.0cm、,NH4+-N,4。4,,NH4+-N;0.08m3/h,。,,;NH4+-N。0.08m3/h,Cl2ClO-,Cl2/ClO-NH4+-N,。,0.08m3/h。2.5,;,。15.0V、pH7、0.08m3/h,NH4+-N,5。5,,NH4+-N。,2.0cm,,,;,,;,,。,3.0cm。2.6;,NH4+-N,,。,,。COD、BOD5、NH4+-N,DSA,2。2,BOD5/COD0.107,,NH4+-N,。DSA,100806040200306090120150180/min■0.04m3/h●0.06m3/h▲0.08m3/h0.10m3/h◆0.12m3/h4NH4+-NNH4+-N/%100806040200306090120150180/minNH4+-N/%5NH4+-N■2.0cm●3.0cm▲4.0cm5.0cm54--2010-10,30(10),BOD5/COD,NH4+-N。180min,BOD5/COD0.524,NH4+-N11.6mg/L,,。3GACCuO-CeO2/γ-Al2O3,NH4+-NDSA。,,,。,,:-dc/dt=Kc(1):c———NH4+-N,mol/L;t———,min;K———,min-1。NH4+-N。-ln(c/c0)t,3NH4+-NkR,R0.95。,NH4+-N。4(1)CuO-CeO2/γ-Al2O3,,,。,NH4+-N,NH4+-N。(2),;pH,NH4+-N,CuOH+OH-,NH4+-N,,pH。(3)DSA,,BOD5/COD0.1070.524,NH4+-N。,,。(4),NH4+-N。[][1],,,.[J].,2006,19(5):85-90.[2]WiszniowskiJ,RobertD,Surmacz-GorskaJ,etal.Landfillleachatetreatmentmethods:areview[J].EnvironmentalChemistryLetter,2006,4(1):51-61.[3]MoraesPB,BertazzoliR.Electrodegradationoflandfillleachateinaflowelectrochemicalreactor[J].Chemosphere,2005,58(1):41-46.[4]KongWuping,WangBo,MaHongzhu,etal.Electrochemicaltreatmentofanionicsurfactantsinsyntheticwastewaterwiththree-dimensionalelectrodes[J].JournalofHazardousMaterials,2006,137(3):1532-1537.[5]KimKW,KimYJ,KimIT,etal.Theelectrolyticdecomposi-tionmechanismofammoniatonitrogenatanIrO2anode[J].Elec-trochimicaActa,2005,50(22):4356-4364.[6],.[J].,1994,15(2):38-40.[7]FockedeyE,LierdeAV.Couplingofanodicandcathodicreac-tionsforphenolelectro-oxidationusingthree-dimensionalelec-trodes[J].WaterResearch,2002,36(16):4169-4175.[8],,,.Mn-Sn-Sb/γ-Al2O3[J].,2006,64(3):235-239.[9]ZhangΗui,FeiChenzhi,ZhangDaobin,etal.Degradationof4-nitrophenolinaqueousmediumbyelectro-Fentonmethod[J].JournalofHazardousMaterials,2007,145(1/2):227-232.2/minBOD5/(mg·L-1)COD/(mg·L-1)BOD5/CODNH4+-N/(mg·L-1)0180.91690.30.1071625.860336.6932.30.361612.5120169.9384.30.442100.018055.8106.50.52411.6[](1980—),2008,,,:。:0311-88632208,E-mailyuelintj@126.com。[]2010-05-12(),:3NH4+-NK/min-1R/V7.5lnc=-0.0029t+7.2790.00290.98810.0lnc=-0.0037t+7.3780.00370.98515.0lnc=-0.0256t+7.3050.02560.98420.0lnc=-0.0236t+7.9010.02360.976pH2.65lnc=-0.0129t+7.4240.01290.9917.04lnc=-0.0256t+7.3050.02560.98410.47lnc=-0.0326t+7.1210.03260.981/(m3·h-1)0.04lnc=-0.0156t+7.4090.01560.9520.08lnc=-0.0256t+7.3050.02560.9840.12lnc=-0.0206t+7.3050.02060.968/cm4.0lnc=-0.0234t+7.4160.02340.9603.0lnc=-0.0256t+7.3050.02560.9842.0lnc=-0.0343t+7.3700.04580.96255--