Pyridine derivative covalently bonded on chitosan pendant chains for textile dye removal

dc.creatorOliveira, CS
dc.creatorAiroldi, C
dc.date2014
dc.dateFEB 15
dc.date2014-07-30T14:18:45Z
dc.date2015-11-26T17:00:19Z
dc.date2014-07-30T14:18:45Z
dc.date2015-11-26T17:00:19Z
dc.date.accessioned2018-03-28T23:48:05Z
dc.date.available2018-03-28T23:48:05Z
dc.identifierCarbohydrate Polymers. Elsevier Sci Ltd, v. 102, n. 38, n. 46, 2014.
dc.identifier0144-8617
dc.identifier1879-1344
dc.identifierWOS:000331779600006
dc.identifier10.1016/j.carbpol.2013.10.075
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/58498
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/58498
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1278440
dc.descriptionChitosan was chemically modified through a sequence of four reactions with immobilized 2-aminomethylpyridine at the final stage, after prior protection of amino group with benzaldehyde. The characterized biopolymers containing free amino and hydroxyl active centers on the biopolymeric structure and pyridinic nitrogen on pendant chains showed combined hydrophobic properties that can potentially favor interactions. Reactive Yellow GR and Blue RN dyes gave the maximum sorption capacities of 2.13 and 1.61 mmol g(-1), which were performed as functions of contact time, concentration and dye structure. However, biopolymer/dye interactions are governed by effective hydrogen bond and van der Waals forces for such structural adjustments. The data obtained from the concentration isotherm were applied to non-linear regressions of the Langmuir, the Freundlich and the Sips models, with the best fit to the latter model. The kinetic data was fitted to non-linear regression of pseudo-second-order, indicating that the sorption phenomena are most likely to be controlled by chemisorption process. (C) 2013 Published by Elsevier Ltd.
dc.description102
dc.description38
dc.description46
dc.languageen
dc.publisherElsevier Sci Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationCarbohydrate Polymers
dc.relationCarbohydr. Polym.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectChitosan
dc.subjectPyridine derivative
dc.subjectSorption
dc.subjectDye
dc.subjectNon-linear regression
dc.subjectReactive Dyes
dc.subjectAqueous-solutions
dc.subjectActivated Carbon
dc.subjectCongo Red
dc.subjectAdsorption
dc.subjectEquilibrium
dc.subjectKinetics
dc.subjectMechanism
dc.subjectThermodynamics
dc.subjectWaste
dc.titlePyridine derivative covalently bonded on chitosan pendant chains for textile dye removal
dc.typeArtículos de revistas


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