Dynamic and static adsorption and desorption of Hg(II) ions on chitosan membranes and spheres

dc.creatorVieira, RS
dc.creatorBeppu, MM
dc.date2006
dc.dateMAY
dc.date2014-11-16T02:30:00Z
dc.date2015-11-26T16:18:37Z
dc.date2014-11-16T02:30:00Z
dc.date2015-11-26T16:18:37Z
dc.date.accessioned2018-03-28T23:02:02Z
dc.date.available2018-03-28T23:02:02Z
dc.identifierWater Research. Pergamon-elsevier Science Ltd, v. 40, n. 8, n. 1726, n. 1734, 2006.
dc.identifier0043-1354
dc.identifierWOS:000237853400026
dc.identifier10.1016/j.watres.2006.02.027
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/63562
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/63562
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/63562
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1267602
dc.descriptionThe adsorption and desorption of Hg(II) ions was studied using static and dynamic methods, employing membranes and spheres of chitosan as the adsorbent. The quantity of adsorption was influenced by chitosan crosslinking and by the adsorbent shape. The Langmuir model was applied to fit the experimental equilibrium data. Glutaraldehyde-crosslinked membranes presented a lower desorption capacity, when compared to natural membranes, but could be regenerated for use in successive cycles. Dynamic adsorption experiments suggested that the adsorption capacity depended mainly on adsorbent geometry, due to differences between surface area to mass ratio and initial concentration of Hg(II) ions. The adsorption capacity determined by the dynamic method was 65% and 77% for membranes and spheres, respectively of the value obtained static method results. A process combining dynamic adsorption and static desorption can be used to concentrate the Hg(11) ions by a factor of nearly seven (7 x), when compared to the initially treated volume.
dc.description40
dc.description8
dc.description1726
dc.description1734
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationWater Research
dc.relationWater Res.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectchitosan
dc.subjectheavy metal
dc.subjectmercury
dc.subjectadsorption
dc.subjectMetal-ions
dc.subjectAqueous-solution
dc.subjectCross-linking
dc.subjectHeavy-metals
dc.subjectRemoval
dc.subjectMercury
dc.subjectEquilibrium
dc.subjectBeads
dc.subjectSorption
dc.subjectChitin
dc.titleDynamic and static adsorption and desorption of Hg(II) ions on chitosan membranes and spheres
dc.typeArtículos de revistas


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