电催化氧化技术处理苯酚废水研究

11120052ELECTROCHEMISTRYVol.11No.1Feb.2005:100623471(2005)0120101204:2003212216,,2004202222,3:Tel:[phone],E2mail:[e-mail](20040350092),3(,,100084):,.SnO2/Ti,,56V,.:SnO2/Ti,COD100mgL-1,0.5mgL-1.:;;;:X781.1:A,(POPs),[1].,,[2].,.,.,,,.,,,[3].,.,.,.,..1Fig.1Schematicdiagramofthreeelectrodessystem1)potentiostat,2)electrochemicalmeasuringsystem,3)counterelectrode:stainlesssteel,4)beaker,5)referencee2lectrode:SCE,6)magneticstirrer,7)workingelectrode:stainlesssteelorgraphite,8)magneticspool1SnO2/Ti,,,1.,,,TD3691TD730002Fig.2TheflowchartofPhenolwastewatertreatedbyelec2trochemicaloxidation1)directcurrentresource,2)anodes,3)cathodes,4)electrochemicalreactor.2,,,.2,2L,20cm8cm(8).,,.22.13SnO2/Ti.,,300mV(3a),,,.1200mV(3b),,.,,,,,.,SnO2/Ti,1500mV(3c),,,.2.21(),3Fig.3Polarizedcurvesfordifferentanodematerialindistilledwaterworkingworkingelectrode:a)stainlesssteel,b)graphite,c)SnO2/Ti,counterelectrode:stainlesssteel,referenceelectrode:SCE.,,56V,8h,COD740mgL-120120051(pH=7.0)Tab.1Phenolwastewatertreatingdatawithdifferentanodematerial(pH=7.0)InitialCOD/mgL-1AnodematerialNa2SO4/gE/VI/AReactivetime/hFinalCOD/mgL-1Finalphenolconcentration/mgL-1744.1Stainlesssteel28.25.42.08110.70.2838.6Graphite28.25.32.0878.70.2110.7mgL-1.,0.5mgL-1,,.:1)CO2H2O;2),,,Fenton,OH.,.,,COD100mgL-1,,COD.,,,,2.,56V,8h,COD838.6mgL-1COD78.7mgL-1.,.,,.,,,,CO2H2O;,OH,.,,COD,0.5mgL-1.COD.,,,.SnO2/Ti,.3:SnO2/Ti.,,.COD,,.(References):[1]ZhouMinghua,WuZucheng,WangDahui.Advancedelectrochemicaloxidationprocessfortreatmentoftoxicandbiorefractoryorganicwastewater[J].ChemicalRe2actionEngineeringandTechnology,2001,17(3):263271.[2]ComninellisCh,PulgarinC.ElectrochemicaloxidationofphenolforwastewatertreatmentusingSnO2anodes[J].JournalofAppliedElectrochemistry,1993,23:108112.[3]WuZucheng,ZhouMinghua.Partialdegradationofphe2nolbyadvancedelectrochemicaloxidationprocess[J].EnvironSci.Technol.,2001,35:26982703.3011:ResearchonPhenolWastewaterTreatmentbyElectrochemicalOxidationLITian2cheng,ZHUShen2lin(DepartmentofChemicalEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Electrochemicaloxidationisaneffectivetechnologyforthephenolwastewatertreatment,andtheanodepropertiesareimportanttotheelectrochemicaloxidationefficiency.Theover2potentialsofoxygenevolu2tionhavebeenmeasuredforthestainlesssteel,feasiblegraphiteandSnO2/Tianoderespectively.Moreover,thesyntheticphenolwastewaterwastreatedbytheelectrochemicaloxidationwiththestainlesssteelorfeasiblegraph2iteanodes.Theexperimentalresultsshowedthattheorderoftheover2potentialisSnO2/Tigraphitestain2lesssteel;meanwhile,theCODvaluesofpurifiedwaterwereapproachingtoorlessthan100mgL-1,andthephenolconcentrationsinthepurifiedwaterwerebelow0.5mgL-1.Keywords:Anodepolarizedcurve,Over2potential,Electrochemicaloxidation,Phenol4012005