Bifunctionalized chitosan : a versatile adsorbent for removal of Cu(II) and Cr(VI) from aqueous solution.

dc.contributor.authorMoreira, Ana Luísa da Silva Lage
dc.contributor.authorPereira, Analice de Souza
dc.contributor.authorSpeziali, Marcelo Gomes
dc.contributor.authorNovack, Kátia Monteiro
dc.contributor.authorGurgel, Leandro Vinícius Alves
dc.contributor.authorGil, Laurent Frédéric
dc.date.accessioned2019-05-06T17:17:23Z
dc.date.available2019-05-06T17:17:23Z
dc.date.issued2018
dc.description.abstractThis study describes the chemical modification of chitosan to produce a novel bifunctionalized adsorbent material (C4) for the removal of Cu2+ and oxyanions of Cr6+ from a single aqueous solution. The chemical modifications allowed C4 to be insoluble under acidic conditions, improving the chemical properties of the modified chitosan in aqueous solution. C4 adsorbent was synthesized by reaction of the amino group of chitosan with 2-pyridinecarboxaldehyde, a reduction of imine group, followed by esterification with EDTA dianhydride (EDTAD). C4 was characterized by solid-state 13C nuclear magnetic resonance, infrared spectroscopy, and elemental analysis. The adsorption studies of Cu2+ and oxyanions of Cr6+ in a batch mode were evaluated as a function of the contact time (kinetics), solution pH, and initial metal ion concentration. The maximum adsorption capacities (Qmax) of C4 for the adsorption of Cu2+ (pH 5.5) and Cr6+ (pH 2.0) were 2.60 and 3.50 mmol/g, respectively. The reusability of the recovered C4 adsorbent was also evaluated.pt_BR
dc.identifier.citationMOREIRA, A. L. da S. L. et al. Bifunctionalized chitosan : a versatile adsorbent for removal of Cu(II) and Cr(VI) from aqueous solution. Carbohydrate Polymers, v. 201, p. 218-227, dez. 2018. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0144861718309536>. Acesso em: 7 mar. 2019.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.carbpol.2018.08.055pt_BR
dc.identifier.issn0144-8617
dc.identifier.urihttp://www.repositorio.ufop.br/handle/123456789/11207
dc.identifier.uri2https://www.sciencedirect.com/science/article/pii/S0144861718309536pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectAdsorptionpt_BR
dc.subjectDesorptionpt_BR
dc.subjectCopperpt_BR
dc.subjectChromiumpt_BR
dc.titleBifunctionalized chitosan : a versatile adsorbent for removal of Cu(II) and Cr(VI) from aqueous solution.pt_BR
dc.typeArtigo publicado em periodicopt_BR

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