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1、BioresourceTechnology102(2011)786–796ContentslistsavailableatScienceDirectBioresourceTechnologyjournalhomepage:www.elsevier.com/locate/biortechNonlinearmodelisationofheavymetalremovalfromaqueoussolutionusingUlvalactucaalgaeS.Zakhama,H.Dhaouadi⇑,F.M’HenniUniversi
2、tédeMonastir,FacultédesSciences,DépartementdeChimie,URChimieAppliquée,Environnement,TunisiaarticleinfoabstractArticlehistory:Afterextensiveanalysis,Ulvalactucadriedalgae,collectedfromtheMonastircoastalzone,wasproventoReceived6May2010besuccessfulasanadsorbentfort
3、heremovalofcertaininorganicpollutants.ThemainobjectiveofthisReceivedinrevisedform26August2010studywasthenonlinearmodelingofheavymetalremovalfromanaqueoussolution,usingafreelyavail-Accepted27August2010ableandwellanalyzedbiomaterial,aswellastheevaluationofitseffica
4、cyonvariousmetalionsorptions.Availableonline19September2010Althoughrelativelylowspecificsurfacearea,comparedtomoreconventionaladsorbents,theselectedbiomaterialdisplaysveryinterestingretentioncapacitieswhenusedwithaqueousinorganicpollutants.Keywords:Thepseudo,first
5、andsecond-orderkineticmodelswereusedtoinvestigatethekineticretentionmech-Ulvalactucaanism.Assumingthenonlinearform,theresultsindicatethattheretentionmechanismisdiffusioncon-HeavymetalsAdsorptiontrolled.Concerningtheheavymetaluptakecapacity,itwasfoundthattheselec
6、tedbiomaterialhasa1111Kineticdatamodelingretentioncapacityof67mggofNi(II),112mggofCu(II),127mggofCd(II)and230mggofIsothermPb(II).Ó2010ElsevierLtd.Allrightsreserved.1.Introductionmetaluptakecapacitiesandsuitabilitytobeusedasbasesforbio-sorbentdevelopment.Thes
7、eincludebacteria(AhluwaliaandHeavymetalsareusedwidelyinavastarrayofindustrialactiv-Goyal,2007),freshwateralgae(Romeraetal.,2007),marinealgaeitiesandtheirsubsequentrelease,viawastewaters,intotheenvi-(Vijayaraghavanetal.,2005)andothers(Monieretal.,2010;Guptaronmen
8、thasresultedinmanyproblemsaffectingbothhumanetal.,2010;Singhetal.,2009).Lead,nickel,cadmiumandcopperhealthandaquaticecosystems(BhatnagarandMinocha,2010).havespecialsi
