Partially exchanged organophilic bentonites

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dc.contributor.authorBarreto, Emerson Paes [UNESP]
dc.contributor.authorLemos, Mariana Santos
dc.contributor.authorAranha, Isabelle Bulhoes
dc.contributor.authorBuechler, Pedro Mauricio [UNESP]
dc.contributor.authorDweck, Jo
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:32:27Z
dc.date.available2014-05-20T15:32:27Z
dc.date.issued2011-09-01
dc.description.abstractPhenol is a pollutant that has caused many problems even when present in low concentrations and still represents an environmental problem with difficult solution. This paper presents a study of phenol adsorption by organophilic clays, obtained from aVerde Claro bentonitic clay, from Bravo, Paraiba State, Brazil, at different partial cation exchange degrees with hexadecyltrimethylammonium (HDTMA) chloride, at increasing reacting ratios, from 20 to 120 mmol/100 g of clay, which were characterized in a previous paper. By using Freundlich isotherms obtained for each case, which presented the best correlation coefficients with experimental data, it can be seen that for equilibrium concentrations up to 0.53 mmol L(-1) of phenol, the adsorptive capacity decreases for organophilic bentonites obtained at cation exchange degrees higher than 80 mmol/100 g of clay. This indicates that in these cases, the higher is the exchange by organic cation, the higher is the difficulty for the phenol diffusion and sorption in the interlayer space of the organophilic clays. For higher equilibrium concentrations, the maximum adsorption occurs for the organophilic bentonite obtained at 100 mmol/100 g of bentonite exchange.en
dc.description.affiliationUniv Fed Rio de Janeiro, Sch Chem, BR-21949900 Rio de Janeiro, Brazil
dc.description.affiliationSão Paulo State Univ, Dept Chem Engn, BR-05424970 São Paulo, Brazil
dc.description.affiliationUnespSão Paulo State Univ, Dept Chem Engn, BR-05424970 São Paulo, Brazil
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent915-920
dc.identifierhttp://dx.doi.org/10.1007/s10973-011-1471-3
dc.identifier.citationJournal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 105, n. 3, p. 915-920, 2011.
dc.identifier.doi10.1007/s10973-011-1471-3
dc.identifier.issn1388-6150
dc.identifier.urihttp://hdl.handle.net/11449/41352
dc.identifier.wosWOS:000294014000021
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Thermal Analysis and Calorimetry
dc.relation.ispartofjcr2.209
dc.relation.ispartofsjr0,587
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectPhenolen
dc.subjectOrganophilic claysen
dc.subjectPartial cation exchangeen
dc.subjectAdsorptionen
dc.titlePartially exchanged organophilic bentonitesen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer

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