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1、JournalofEnvironmentalManagement90(2009)1204–1212ContentslistsavailableatScienceDirectJournalofEnvironmentalManagementjournalhomepage:www.elsevier.com/locate/jenvmanFluorideremovalbyacontinuousflowelectrocoagulationreactora,*bMohammadM.Emamjomeh,MuttucumaruSivakumaraEnvironment
2、alHealthEngineeringGroup,FacultyofHealth,QazvinUniversityofMedicalSciences,BahonarStreet,Qazvin,IranbSustainableWaterandEnergyResearchGroup,SchoolofCivil,MiningandEnvironmentalEngineering,FacultyofEngineering,UniversityofWollongong,Wollongong,NSW2522,Australiaarticleinfoabstra
3、ctArticlehistory:Long-termconsumptionofwatercontainingexcessivefluoridecanleadtofluorosisoftheteethandReceived11November2007bones.Electrocoagulation(EC)isanelectrochemicaltechnique,inwhichavarietyofunwanteddissolvedReceivedinrevisedform13May2008particlesandsuspendedmattercanbeef
4、fectivelyremovedfromanaqueoussolutionbyelectrolysis.Accepted9June2008ContinuousflowexperimentswithmonopolaraluminiumelectrodesforfluorideremovalwereAvailableonline22July20082undertakentoinvestigatetheeffectsofthedifferentparameterssuchas:currentdensity(12.5–50A/m),flowrate(150–40
5、0mL/min),initialpH(4–8),andinitialfluorideconcentration(5–25mg/L).ThehighestKeywords:treatmentefficiencywasobtainedforthelargestcurrentandtheremovalefficiencywasfoundtobeElectrochemistrydependentonthecurrentdensity,theflowrateandtheinitialfluorideconcentrationwhenthefinalpHChemicalr
6、eactorsElectrocoagulationreactorrangedbetween6and8.ThecompositionofthesludgeproducedwasanalysedusingtheX-rayFluorideremovaldiffraction(XRD)spectrum.Thestrongpresenceofthealuminiumhydroxide[Al(OH)3]intheabovepHrange,whichmaximizestheformationofaluminiumfluoridehydroxidecomplex[A
7、lnFm(OH)3nm],isthemainreasonfordefluoridationbyelectrocoagulation.Theresultsobtainedshowedthatthecontinuousflowelectrocoagulationtechnologyisaneffectiveprocessfordefluoridationofpotablewatersuppliesandcouldalsobeutilizedforthedefluoridationofindustrialwastewater.Ó2008ElsevierLtd.
8、Allrightsreserved.1.Introductioncountriesoftheworld,ChinaandI
