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244()Vol.24No.4200412JournalofBaojiUniversityofArtsandSciences(NaturalScience)Dec.2004X1,2,2(1.,730070;2.,730070):,208040,,,:;;;;:X703:A:100721261(2004)0420279205Advancesontreatmentofrefractoryorganicwastewaterusingelectro2oxidationmethodWANGHui1,WANGJian2zhong2,ZHANGPing2(1.Coll.Chem.&Chem.Engn.,NorthwestNormalUniv.,Lanzhou730070,Gansu,China;2.Coll.Geog.&EnvmtSci.,NorthwestNormalUniv.,Lanzhou730070,Gansu,China)Abstract:Electro2oxidationiseffectivefordegradingtherefractorypollutants.Forthisreason,ithasbeenex2tensivelystudiedsincethe1980s.Themechanismsofelectro2oxidativeprocessintherefractoryorganicwastewatertreatmentwasreviewedwith40refs.Thedifficultiesofthismethodwereanalyzedinpracticalapplication.Theprospectiveresearchworkofelectro2oxidativetechnologywasindicated.Keywords:electro2oxidation;mechanism;organicwastewater;degradingprocess;electrode,,[1],,,,,,[1],:,,,,,2080[1],,,[27],,1,,2,[8]2[9],,,;X:2004205213,:2004206210.E2mail:wanghui7908@eyou.com:(19792),,,,:.,Pt,IrO2,,PbO2SnO21.1,,,97.5%,72.5%CO2[10]CHIANG[11],,,(),(,MOx-1)[12],:,H2OOH-(OH):MOx+H2OMOx(OH)+H++e-(1)[13]:EO-(OH,H+/H2O)=2.72V/NHE(pH=0);EO-(OH/OH-)=1.89V/NHE(pH=11),,,,R+MOx(OH)zCO2+zH++ze-+MOx(2),,MOx+1:MOx(OH)MOx+1+H++e-(3)MOx+1:R+MOx+1RO+MOx(4),2SnO2;PtTi/RuO2Ti/IrO2SnO2,;,,,(2)(4),:MOx(OH)1/2O2+MOx+H++e-(5)MOx+11/2O2+MOx(6),,(2)(4),(5)(6),,1.2,,,,1.2.1FARMER[14],(),,,,,Ag2+,Co3+,Fe3+,Ce4+Ni2+LEFFRANG[15]Co3+/Co2+,2242,CO2CO,98%,75%,,,1.2.2(ClO-)PANIZZA[16],Cl-,,ClO-,ClO-:2Cl-Cl2+2e-(7)Cl2+H2OHClO+Cl-+H+(8)HClOH++ClO-(9)YANG[17]Cl-ClO-CHIANG[11]Cl-,,Cl2/082()2004ClO-ClO-[18][19][20]1.2.3H2O2H2O2[2124]2H2O2,::O2+2H++2e-H2O2(10):O2+H2O+2e-HO2-+OH-(11)HO2-+H2OH2O2+OH-(12)H2O2,Fe2+,Fe2+,(OH),,H2O2,::Fe2++H2O2+H+Fe3++OH+H2O(13):Fe2++H2O2Fe3++OH+OH-(14)1.2.4O3,O3THANOS[25],,O3,,O2,O3,O3,O3,O3:3H2OO3(g)+6e-+6H+(15)O2+H2OO3(aq)+2e-+2H+(16)O3,[26][26]22.1[27],,(),(),,,[28],,;,,,,,,O2,,,Ti/RuO2Ti/Pt2IrPtPbO2IrO2TiO2SnO2,1[29]1,VvsNHETable1O2overpotentialfordifferentialelectrodesAnodeE/VCH2SO4/molL-1Pt1.30.5Pt1.60.5IrO21.60.5Graphite1.70.5PbO21.91SnO21.90.5Pb2Sn(937)2.50.5TiO22.21Si/BDD2.30.5Ti/BDD2.70.5DiaChem2.80.51,IrO2Pt,,,,,,Ti,,,,100%[30]ZHI,CO2,96%Pt,,[31]2.21824,,,;,,,,,,[32],,,[28]1973,M.FLEISCHMAMN,F.GOODRIDGE[32],,,,,,,,,,,()[33][34]2(,4001000m2/g,50nm),2(,BET750m2/g),,,,,,[35,36],2.3,pH,,,(),,,,,,,,:,,,,,,;,Cl-,Cl-pH,,,2,[37][38],320,,,,,CODBOD[2,4,5,7],,[39],,,,,,,,,,;,[39,40]4282()2004,,,,,,,,,,,;,,,,,:[1]SARACCOG,SOLRINOL,AIGOTTIR,etal.Electro2chemicaloxidationoforganicpollutantsatlowelectrolyteconcentrations[J].ElectrochimActa,2000,46:3732380.[2]PULGARINC,ALDERN,PERINGERP,etal.Electro2chemicaldetoxificationofa1,42benzoquinonesolutioninwastewatertreatment[J].WatRes,1994,28(4):8872893.[3]SMITHDeSucreV,WATKINSONAP.Anodicoxidationofphenolforwastewatertreatment[J].CanJChemEng,1981,59(1):52259.[4]SHARIFIANH,KIRKDW.TheElectrochemicalOxida2tionofphenol[J].JElectrochemSoc,1986,133(5):9212924.[5]COMNINELLISC,PULGARINC.Electroche2micaloxidationofphenolforwastewatertreatmentusingSnO2anodes[J].JApplElectrochem,1993,23(1):1082112.[6]COMNINELLISC,NERINIA.AnodicoxidationofphenolinthepresenceofNaClforwastewatertreatment[J].JApplElectrochem,1995,25(1):23228.[7]LINSH,SHYUCT,SUNMC.Salinewastewatertreat2mentbyelectrochemicalmethod[J].WatRes,1998,32(4):105921066.[8]CHUANPINGF,NORIOS,SATORUS.Developmentofhighperformanceelectrochemicalwastewatertreatmentsys2tem[J].JHazardMater,2003,B103:65278.[9]PABLOC,JESUSG,JUSTOL.Modelingofwastewaterelectro2oxidationprocesspart.applicationtoactiveelectrodes[J].IndEngChemRes,2004,43(9):192321931.[10]KIRKDW.Anodicoxidationofanilineforwastewatertreatment[J].JApplElectrochm,1985,15(2):2852292.[11]CHIANGLC.Indirectoxidationeffectinelectrochemicaloxidationtreatmentoflandfillleachate[J].WatRes,1995,29(2):6712678.[12]COMNINELLISC.Electrocatalysisintheelec2trochemicalconversion/combustionoforganicpollutantsforwastewatertreatment[J].ElectrochimActa,1994,39(11/12):185721862.[13]OTURANMA,PIOSONJ.Hydroxylationbyelectro2chemicallygeneratedOHradicals.mono2andpolyhy2drolationofbenzoicacid:productsandisomersdistri2bution[J].JPhysChem,1995,99(38):13948213954.[14]FARMERJC,WANGFT,HAWLEY2FEDDERRA,etal.Electrochemicaltreatmentofmixedandhazardouswastes:oxidationofethyleneglycolandbenzenebysilver()[J].JElectrochemSoc,1992,139:6542662.[15]LEFFRANGU,EBERTK,FLORYK,etal.Organicwastedestructionbyindirectelectrooxidation[J].SeparationScienceandTechnology,1995,30(729):1883.[16]PANIZZAM.Electrochemicaltreatmentofwastewatercontainingpolyaroamticorganicpollutants[J].WatRes,2000,34(9):260122605.[17]YANGCH.HypochloritegenerationonRu2Ptbinaryox2idefortreatmentofdyewastewater[J].JApplElectrochem,2000,30(6):104321051.[18]NANUMCZYKJ.Electrochemicaltreatmentoftannerywasterwatercontaininghighstrengthpollutants[J].TransIchem,1996,74(1):59268.[19]DOJS,YEHWC.Insitudegradationofformaldehydewithelectrogeneratedhypochloriteion[J].JApplElectrochem,1995,25(5):4832489.[20]WANGP.Electrochemicaloxidationofleachatepretreatedinanupflowanaerobicsludgeblanketreactor[J].EnvironTe