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Use este identificador para citar o ir al link de este elemento: http://hdl.handle.net/1843/63547
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Campo DCValorIdioma
dc.creatorFrancine Tatiane Rezende de Almeidapt_BR
dc.creatorBruno Christiano Silva Ferreirapt_BR
dc.creatorAna Luísa da Silva Lage Moreirapt_BR
dc.creatorRossimiriam Pereira de Freitaspt_BR
dc.creatorLaurent Frédéric Gilpt_BR
dc.creatorLeandro Vinícius Alves Gurgelpt_BR
dc.date.accessioned2024-01-31T14:38:22Z-
dc.date.available2024-01-31T14:38:22Z-
dc.date.issued2016-
dc.citation.volume466pt_BR
dc.citation.spage297pt_BR
dc.citation.epage309pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jcis.2015.12.037pt_BR
dc.identifier.issn0021-9797pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/63547-
dc.description.resumoThis study describes the synthesis of a new chitosan derivative (C2) with zwitterionic characteristics and its use for the removal of cationic species Cu2+, Co2+, and Ni2+ and anionic species of Cr6+ in a single aqueous solution. The new adsorbent was synthesized by quaternization of the amine group of chitosan and esterification of hydroxyl groups with EDTA dianhydride. These combined reactions gave both cationic and anionic characteristics to C2 with the release of quaternary ammonium groups and carboxylic groups. The capacity of C2 to adsorb Cu2+, Co2+, Ni2+, and oxyanions of Cr6+ was evaluated in a batch process with different contact times, pH values, and initial concentrations. Adsorption isotherms were best fitted to the Langmuir and Sips models. The maximum adsorption capacities (Qmax) of C2 for adsorption of Cu2+, Co2+, Ni2+, and Cr6+ were 0.698, 1.125, 0.725, and 1.910 mmol/g, respectively. The ΔadsG° values were in the range from −20 to −28 kJ/mol. These values suggest a mixed mechanism controlling adsorption. Desorption studies using an aqueous solution consisting of 0.1 mol/L HNO3 were carried out. The reusability of the recovered C2 adsorbent after desorption was also evaluated.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Geraispt_BR
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of Colloid and Interface Sciencept_BR
dc.rightsAcesso Restritopt_BR
dc.subjectBifunctionalized chitosanpt_BR
dc.subjectAdsorptionpt_BR
dc.subjectCopperpt_BR
dc.subjectCobaltpt_BR
dc.subjectNickelpt_BR
dc.subjectChromiumpt_BR
dc.subjectDesorptionpt_BR
dc.subject.otherQuitosanapt_BR
dc.subject.otherAdsorçãopt_BR
dc.subject.otherCromopt_BR
dc.subject.otherNíquelpt_BR
dc.subject.otherCobaltopt_BR
dc.subject.otherCobrept_BR
dc.subject.otherCinética químicapt_BR
dc.subject.otherQuímica orgânicapt_BR
dc.subject.otherFísico-química orgânicapt_BR
dc.titleApplication of a new bifunctionalized chitosan derivative with zwitterionic characteristics for the adsorption of Cu2+, Co2+, Ni2+, and oxyanions of Cr6+ from aqueous solutions: kinetic and equilibrium aspectspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0021979715304215pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-1119-6822pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-6974-3724pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9509-3235pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-5249-8670pt_BR
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