Removal of fluoride from aqueous environment by modified Amberlite resin

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1、JournalofHazardousMaterials171(2009)815–819ContentslistsavailableatScienceDirectJournalofHazardousMaterialsjournalhomepage:www.elsevier.com/locate/jhazmatRemovaloffluoridefromaqueousenvironmentbymodifiedAmberliteresinImamBakhshSolangi,ShahabuddinMemon∗,M.I.BhangerNationalCenterofExcellenceinAnalyt

2、icalChemistry,UniversityofSindh,Jamshoro76080,PakistanarticleinfoabstractArticlehistory:Fluorideindrinkingwaterabovepermissiblelevelisresponsibleforhumanbeingaffectedbyskeletalflu-Received11February2009orosis.Inthisstudy,AmberliteXAD-4TMhasbeenmodifiedbyintroducingaminogroupontothearomaticReceived

3、inrevisedform11April2009ringforitsapplicationinfluorideremediation.Characterizationofthemodifiedresinwasmadeby,FT-IRAccepted15June2009andelementalanalysis(CHNS)techniques.ThepH9wasoptimumvalueforquantitativesorptionoffluo-Availableonline21June2009rideinbothbatchandcolumnexperiments.Thedesorptionoffl

4、uoridewasachievedbyusing10%HCl.ThebatchandcolumnsorptionstudiesoffluoridewithmodifiedresinwerecarriedouttoevaluatesorptionKeywords:isothermstoo.ThusequationisothermssuchasLangmuir,Freundlich,andDubinin–Radushkevich(D–R)Fluorideremediationweresuccessfullyusedtomodeltheexperimentaldata.Thesorptionca

5、pacityofmodifiedAmberliteTharDesertXAD-4resinwasfoundas5.04×10−3molg−1.FromtheD–Risothermparameters,ithasbeenevaluatedAdsorptionisothermsSolidphaseextractionthattheuptakeoffluoridebymodifiedresinoccursthroughionexchangeadsorptionmechanism.TheIonchromatographystudywillcontributetowardtheremovaloffluo

6、ridefromtheaqueousenvironmentaswellasinthefieldIonexchangeresinofanalyticalandenvironmentalchemistry.©2009ElsevierB.V.Allrightsreserved.1.IntroductionVariousresearchers[4,17]haveemphasizedtheadvantagesofsolidphaseextraction(SPE)overothertechniquesandinparticularFluorideindrinkingwaterhassignifican

7、tadvantagesaswelloverliquid–liquidextraction.Chelatingresinshavebeenfrequentlyasdetrimentaleffectstohumanhealthdependingonitsconcen-usedinSPE’sastheyprovidegoodstability,highsorptioncapacitytration.Fluoridehasmajorroleforthe