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1、SeparationandPurificationTechnology38(2004)11–41ElectrochemicaltechnologiesinwastewatertreatmentGuohuaChen∗DepartmentofChemicalEngineering,HongKongUniversityofScience&Technology,ClearWaterBay,Kowloon,HongKong,ChinaReceived19September2003;accepted13October2003AbstractThisp
2、aperreviewsthedevelopment,designandapplicationsofelectrochemicaltechnologiesinwaterandwastewatertreat-ment.Particularfocuswasgiventoelectrodeposition,electrocoagulation(EC),electroflotation(EF)andelectrooxidation.Over300relatedpublicationswerereviewedwith221citedoranalyze
3、d.Electrodepositioniseffectiveinrecoverheavymetalsfromwastewaterstreams.Itisconsideredasanestablishedtechnologywithpossiblefurtherdevelopmentintheimprovementofspace-timeyield.EChasbeeninuseforwaterproductionorwastewatertreatment.Itisfindingmoreapplicationsusingeitheralumi
4、num,ironorthehybridAl/Feelectrodes.TheseparationoftheflocculatedsludgefromthetreatedwatercanbeaccomplishedbyusingEF.TheEFtechnologyiseffectiveinremovingcolloidalparticles,oil&grease,aswellasorganicpollutants.Itisproventoperformbetterthaneitherdissolvedairflotation,sediment
5、ation,impellerflotation(IF).Thenewlydevelopedstableandactiveelectrodesforoxygenevolutionwoulddefinitelyboosttheadoptionofthistechnology.Electrooxidationisfindingitsapplicationinwastewatertreatmentincombinationwithothertechnologies.Itiseffectiveindegradingtherefractorypollut
6、antsonthesurfaceofafewelectrodes.Titanium-basedboron-dopeddiamondfilmelectrodes(Ti/BDD)showhighactivityandgivereasonablestability.ItsindustrialapplicationcallsfortheproductionofTi/BDDanodeinlargesizeatreasonablecostanddurability.©2003ElsevierB.V.Allrightsreserved.Keywords
7、:Advancedoxidation;Anode;Electrocoagulation;Electrodeposition;Electroflotation;Electrooxidation;Oxygenevolution;Water1.Introductionelectricitysupply,electrochemicalwaterorwastewatertechnologiesdidnotfindwideapplicationworldwideUsingelectricitytotreatwaterwasfirstproposedthe
8、n.Extensiveresearch,however,intheUSandtheinUKin1889[1].TheapplicationofelectrolysisinformerUSSRduringth
