Maleic anhydride incorporated onto cellulose and thermodynamics of cation-exchange process at the solid/liquid interface

dc.creatorde Melo, JCP
dc.creatorda Silva, EC
dc.creatorSantana, SAA
dc.creatorAiroldi, C
dc.date2009
dc.dateAUG 20
dc.date2014-11-19T12:00:10Z
dc.date2015-11-26T17:05:43Z
dc.date2014-11-19T12:00:10Z
dc.date2015-11-26T17:05:43Z
dc.date.accessioned2018-03-28T23:54:06Z
dc.date.available2018-03-28T23:54:06Z
dc.identifierColloids And Surfaces A-physicochemical And Engineering Aspects. Elsevier Science Bv, v. 346, n. 41699, n. 138, n. 145, 2009.
dc.identifier0927-7757
dc.identifierWOS:000268923200022
dc.identifier10.1016/j.colsurfa.2009.06.006
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/53115
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/53115
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/53115
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1279656
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionThis investigation explores the chemical modification of cellulose by using a quasi solvent-free procedure, in which the biopolymer was added to molten maleic anhydride, producing a mixture of maleated and fumarated celluloses. Using this pathway mainly surface modifications are observed and more than 2.82 +/- 0.05 mmol of modifier per gram of synthesized polymer were obtained. These chemically modified materials were characterized by elemental analysis, solid-state (13)C NMR CP/MAS, FTIR, XRD, TG and SEM. The chemically modified polysaccharides are able to adsorb cations. The data were adjusted to a modified Langmuir equation to give 1.75 +/- 0.09 and 2.40 +/- 0.12 mmol/g of Co(2+) and Ni(2+), respectively. The net thermal effects obtained from calorimetric titration measurements were also adjusted to a modified Langmuir equation and the enthalpy of the interaction was calculated to give the endothermic values of 0.29 +/- 0.02 and 0.87 +/- 0.02 kJ/mol for Co(2+) and Ni(2+), respectively. The thermodynamic data for these systems are favorable for cation adsorption from aqueous solutions at the solid/liquid interface, suggesting the use of this anchored biopolymer for cation removal from the environment. (C) 2009 Elsevier B.V. All rights reserved.
dc.description346
dc.description41699
dc.description138
dc.description145
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationColloids And Surfaces A-physicochemical And Engineering Aspects
dc.relationColloid Surf. A-Physicochem. Eng. Asp.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectModified cellulose
dc.subjectMaleic anhydride
dc.subjectSolvent-free
dc.subjectAdsorption
dc.subjectCalorimetry
dc.subjectThermodynamic
dc.subjectLow-cost Adsorbents
dc.subjectSugarcane Bagasse
dc.subjectAcid-hydrolysis
dc.subjectHeavy-metals
dc.subjectX-ray
dc.subjectAdsorption
dc.subjectFibers
dc.subjectEsters
dc.subjectNmr
dc.subjectRemoval
dc.titleMaleic anhydride incorporated onto cellulose and thermodynamics of cation-exchange process at the solid/liquid interface
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución