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1、JournalofEnvironmentalSciences21(2009)1473–1479PreparationoforganicallyfunctionalizedsilicagelasadsorbentforcopperionadsorptionWANGHongjie1;2,KANGJin1;2,LIUHuijuan1,QUJiuhui1,1.ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China.E-mail:whj99
2、@hotmail.com2.GraduateUniversityoftheChineseAcademyofSciences,Beijing100049,ChinaReceived26December2008;revised17April2009;accepted21April2009AbstractAnoveladsorbent(AMPS-silica)wassynthesizedbyboundingAMPS(2-acrylamido-2-methylpropanesulfonicacid)ontosilicasurface,whichfunctio
3、nedwith-methacryloxypropyltrimethoxysilanereagent.Theadsorbentwascharacterizedbynitrogenadsorp-tion/desorptionmeasurement,thermogravimetricanalysis(TGA)andpotentiometrictitrationanalysis.TheTGAresultindicatedthatthesurfacemodificationreactionsintroducedsomeorganicfunctionalgroup
4、sontothesurfaceofsilica.ThesurfaceareaofAMPS-silicawas389.7m2/g.Theadsorbentwasexaminedforcopperionremovalinseriesofbatchadsorptionexperiments.ResultsshowedthattheadsorptionofCu2+ontoAMPS-silicawaspHdependent,andtheadsorptioncapacityincreasedwithincreasingpHfrom2to6.Theadsorpti
5、onkineticsshowedthatCu2+adsorptionwasfastandthedatafittedwellwithapseudosecond-orderkineticmodel.TheadsorptionofCu2+ontoAMPS-silicaobeyedbothFreundlichandLangmuirisotherms,withr2=0.993andr2=0.984,respectively.ThemaximumCu2+adsorptioncapacitywas19.9mg/g.Theinvolvedmechanismmightb
6、etheadsorptionthroughmetalbindingwithorganicfunctionalgroupssuchascarboxyl,aminoandsulfonicgroups.Cu2+loadedonAMPS-silicacouldbedesorbedinHNO3solution,andtheadsorptionpropertiesremainstableafterthreeadsorption-desorptioncycles.Keywords:organicallyfunctionalizedsilicagel;2-acryl
7、amido-2-methylpropanesulfonicacid(AMPS);adsorptionDOI:10.1016/S1001-0742(08)62442-0Introductionregeneration(ChakrabortyandTare,2006;Kumaretal.,2007;Xueetal.,2008).ThefunctionalgroupsontheCopperisextensivelyusedintheelectricalandsemicon-surfacesoftheadsorbentsplayimportantrolesi
8、nthead-ductorindustries,andinthemanufactureoffungicide
