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1、JournalofHazardousMaterials186(2011)863–868ContentslistsavailableatScienceDirectJournalofHazardousMaterialsjournalhomepage:www.elsevier.com/locate/jhazmatPreparationandcharacterizationofporousgranularceramiccontainingdispersedaluminumandironoxidesasadsorbentsforfluorideremovalfromaqueoussoluti
2、onNanChena,b,ZhenyaZhangb,ChuanpingFenga,∗,DiruiZhub,c,YingnanYangb,NorioSugiurabaSchoolofWaterResourcesandEnvironment,ChinaUniversityofGeosciences(Beijing),Beijing100083,ChinabGraduateSchoolofLifeandEnvironmentalSciences,UniversityofTsukuba,Tsukuba305-8572,JapancSchoolofLifeSciences,YunNanUn
3、iversity,Yunnan650091,ChinaarticleinfoabstractArticlehistory:PorousgranularceramicadsorbentscontainingdispersedaluminumandironoxidesweresynthesizedReceived20August2010byimpregnatingwithsaltsolutionsfollowedbyprecipitationat600◦C.InthepresentworkdetailedReceivedinrevisedform27October2010studie
4、swerecarriedouttoinvestigatetheeffectofcontacttime,adsorbentdose,initialsolutionpHAccepted20November2010andco-existinganions.CharacterizationstudiesontheadsorbentbySEM,XRD,EDS,andBETanalysisAvailableonline26November2010werecarriedouttoclarifytheadsorptionmechanism.Theadsorbentsweresphereinsha
5、pe,2–3mminparticlesize,highlyporousandshowedspecificsurfaceareaof50.69sqm/g.ThefluorideadsorptionKeywords:capacityofpreparedadsorbentwas1.79mg/g,andthemaximumfluorideremovalwasobtainedatpHPorousgranularceramic6.BoththeLangmuirandFreundlichisothermmodelswerefoundtorepresentthemeasuredadsorptionFl
6、uorideremovalAdsorptionisothermsdatawell.Theexperimentaldatawerewellexplainedwithpseudo-second-orderkineticmodel.ResultsAdsorptionkineticsfromthisstudydemonstratedpotentialutilityofAl/Fedispersedinporousgranularceramicsthatcouldbedevelopedintoaviabletechnologyforfluorideremovalfromaqueoussolut
7、ion.©2010ElsevierB.V.Allrightsreserved.1.Introductionquantity[18].Severaladsorbentsweretriedfortheremovaloffluoridefromaqueoussolutionnamelyactivatedalumina,redFluorideelementisessentialaswellasdetrimentalforthemud,chitosanbeads,carbonaceousma
