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1、Ind.Eng.Chem.Res.2007,46,9205-92129205AdsorptionofFluoridefromWaterSolutiononBoneCharNahumA.Medellin-Castillo,²RobertoLeyva-Ramos,*,²,³RaulOcampo-Perez,²RamonF.GarciadelaCruz,²AntonioAragon-PinÄa,²JoseM.Martinez-Rosales,§RosaM.Guerrero-Coronado,²andLauraFuentes-Rubio²DMASC,InstitutoPot
2、osinodeInVestigacionCientificayTecnologica,CaminoalaPresadeSanJose,Col.Lomas4a.Seccion,SanLuisPotosi78216,SLP,Mexico,CentrodeInVestigacionyEstudiosdePosgrado,FacultaddeCienciasQuimicas,UniVersidadAutonomadeSanLuisPotosõÂ,AVe.Dr.M.NaVaNo.6,ZonaUniVersitaria,SanLuisPotosõÂ78260,SLP,Mexic
3、o,andCentrodeInVestigacionesenQuimicaInorganica,UniVersidaddeGuanajuato,NoriaAltas/n,Col.NoriaAlta,Guanajuato36050,MexicoTheeffectsofsolutionpHandtemperatureontheadsorptionoffluorideontobonecharmadefromcattleboneswereinvestigatedinthiswork.Itwasfoundthatthemaximumadsorptiontookplaceatp
4、H3andtheadsorptioncapacitydecreasednearly20timesaugmentingthepHfrom3to12.Thisbehaviorwasattributedtotheelectrostaticinteractionsbetweenthesurfaceofbonecharandthefluorideionsinsolution.Theadsorptioncapacitywasnotinfluencedbytemperatureintherangefrom15to35°C.Acomparisonoffluorideadsorpti
5、oncapacitiesamongseveraladsorbentsrevealedthattheadsorptioncapacityofthebonecharwas2.8and36timesgreaterthanthoseofacommercialactivatedalumina(F-1)andacommercialactivatedcarbon(F-400).Theadsorptioncapacityisconsiderablydependentuponthephysicochemicalpropertiesofthebonecharsurfaceandthes
6、olutionpH.1.Introductionmaterialsexhibitingexceptionallyhighfluorideadsorptioncapacities.12,13TheleveloffluorideindrinkingwaterisaveryimportantNoveladsorbentsforfluorideremovalfromwatersolutionsfactorinevaluatingthequalityofwaterforhumanconsumption.14havebeenpreparedbyimpregnatingalumi
7、na,chelatingDependingontheleveloffluoride,theingestionoffluoride-resins,15cross-linkedgelatin,16andsilicagel17withrareearthcontainingdrinkingwatercanbeeitherbeneficialordetrimentalelements.Recently,amorphousaluminasupportedoncarbontohumanhealth.TheWorldHealthOrganizationhasrecom-nano
