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1、Desalination249(2009)687–693ContentslistsavailableatScienceDirectDesalinationjournalhomepage:www.elsevier.com/locate/desalDe?uoridationofdrinkingwaterusingchemicallymodi?edbentoniteclayabbb,?SanjayP.Kamble,PriyadarshiniDixit,SadhanaS.Rayalu,NitinK.LabhsetwaraChemicalEngineeringandProcessDevelopmen
2、tDivision,NationalChemicalLaboratory(NCL-CSIR),Dr.HomiBhabhaRoad,Pune-411008,IndiabEnvironmentalMaterialsUnit,NationalEnvironmentalEngineeringResearchInstitute(NEERI-CSIR),NehruMarg,Nagpur-400020,IndiaarticleinfoabstractArticlehistory:Adsorptionpotentialofmetaloxide(lanthanum,magnesiumandmanganese
3、)incorporatedbentoniteclayAccepted26January2009wasinvestigatedforde?uoridationofdrinkingwaterusingbatchequilibriumexperimentstogaininsightofAvailableonline8October2009adsorptionbehavior,kineticsandmechanismsofadsorptionof?uorideion.Theeffectofvariousphysico-chemicalparameterssuchaspH,adsorbentdose
4、,initial?uorideconcentrationandthepresenceofKeywords:interferingco-ionsonadsorptionof?uoridehasbeeninvestigated.The10%La-bentoniteshowshigherDe?uoridation?uorideuptakecapacityforde?uoridationofdrinkingwaterascomparedtoMg-bentonite,Mn-bentonite10%La-bentoniteandbarebentoniteclay.Theuptakeof?uoridei
5、nacidicpHwashigherascomparedtoalkalinepH.TheWatertreatmentLangmuirandFreundlichequilibriumadsorptiondata?ttedreasonablywellinbothLangmuirandFreundlichisothermmodels.Itwasadsorptionisothermsalsoobservedthatinthepresenceofcertainco-existingionscanhavepositiveeffectonremovalof?uoride,Kineticmodelingw
6、hilecarbonateandbicarbonateanionsshowdeleteriouseffect.Therateofadsorptionwasreasonablyrapidandmaximum?uorideuptakewasattainedwithin30min.Themodi?edadsorbentmaterialshowsbetter?uorideremovalpropertiesforactual?eldwater,whichcouldbeduetothepositiveeffectofotherco-ionspresentinthe?eldwater.?2009Else
7、vierB.V.Allrightsreserved.1.Introductiondevelopmentofeffectiveadsorbentmaterialsforde?uoridationofwater.Variousmaterials(e.g.lime,alum,aluminumsulfate,poly-Waterpollutionanditstreatmenttoavailsafedrinkingwaterisa
