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《Electrodialytic removal of fluoride from water Effects of process parameters》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、SeparationandPurificationTechnology64(2008)147–153ContentslistsavailableatScienceDirectSeparationandPurificationTechnologyjournalhomepage:www.elsevier.com/locate/seppurElectrodialyticremovaloffluoridefromwater:EffectsofprocessparametersandaccompanyinganionsErdemErgun
2、a,AliTora,∗,YunusCengeloglub,IzzetKocakbaSelcukUniversity,DepartmentofEnvironmentalEngineering,Campus,42031Konya,TurkeybSelcukUniversity,DepartmentofChemistry,Campus,42031Konya,TurkeyarticleinfoabstractArticlehistory:Theremovaloffluoridefromwaterbyusingelectrodialy
3、siswithSB-6407anionexchangemembranewasReceived29January2008testedatdifferentcurrentdensities.AfterthedeterminationoftheoptimumpHoffeedphaseunderDon-Accepted22September2008nandialysisconditionwhichgavethemaximumtransportoffluoride,theeffectofmono-andbi-valentions,su
4、chaschlorideandsulphate,inthefeedphaseontheremovalwasinvestigatedbyelectrodialysis.Keywords:ThetransportoffluoridewasalsocorrelatedwiththefluxdataandexplainedaccordingtostructureofFluoridemembrane.Itwasfoundthattheremovaloffluoridewashigherintheabsenceofmono-andbi-va
5、lentDefluoridationions.ThereducingeffectofsulphateionsonthetransportoffluoridewashigherthanthatofchlorideElectrodialysisions,whichwasexplainedbyconsideringinteractionofbothchlorideandsulphateionswiththeionicAnion-exchangemembranegroupinthemembraneandactivitycoefficie
6、ntoffluorideinthepresenceofmono-andbi-valentionset.Moreover,transportoffluorideincreasedwithincreasingcurrentdensityandfeedphaseconcentration.Asthedrivingion,thechlorideionismoreefficientthanthesulfateion.Applicationofelectrodialysiswascarriedoutontherealwatercontain
7、ing20.6mg/Loffluoride.Despitethepresenceofchlorideandsulphateinrealwatersample,fluorideconcentrationcouldbereducedto0.8mg/L(96%removal),whichwaslowerthanWorldHealthOrganization(WHO)standard(1.5mg/L).©2008ElsevierB.V.Allrightsreserved.1.Introductiongreatlyincreasedwh
8、entherearenocarbonregenerationunitslocally[18,19].Therefore,inrecentyears,differenttypesoflow-costFluorideindrinkingwatercanbeeitherbeneficialordetri-mat
