Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de Lavras (UFLA)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorCarvalho, Lucas Braganca-
Autor(es): dc.creatorBaracho, Raphaela do Vale-
Autor(es): dc.creatorAndrade, Jessica Moreira-
Autor(es): dc.creatorMagriotis, Zuy Maria-
Autor(es): dc.creatorPinto, Luciana Matos Alves-
Data de aceite: dc.date.accessioned2025-08-21T23:18:29Z-
Data de disponibilização: dc.date.available2025-08-21T23:18:29Z-
Data de envio: dc.date.issued2022-11-29-
Data de envio: dc.date.issued2022-11-29-
Data de envio: dc.date.issued2022-08-29-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1080/10934529.2022.2119040-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/237686-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/237686-
Descrição: dc.descriptionThe generation of residues containing dyes by industrial sectors has been mobilizing scientists to develop methodologies capable of treating water containing these contaminants. Adsorption is an option to remove these molecules from the aqueous medium and, for this study, the composites between silica and cyclodextrins alpha (alpha-CDSI) and gamma (gamma-CDSI) were used to capture methylene blue. Adsorption was spontaneous for both composites (Delta G < 0) and characterized as exothermic and of a physical nature, with Delta H of -17.68 and -12.13 kJ mol(-1) for alpha-CDSI and gamma-CDSI, respectively. Adsorption took place over a wide pH range, with an efficiency of approximately 96%, reaching equilibrium at 5 minutes. The adsorption kinetics was described by the pseudo-second-order model (R-2 > 0.999) and the adsorption isotherms showed that the process must occur mainly by dye complexation in the cyclodextrins cavities. The q(m) values obtained were 210.8 and 205.2 mg g(-1) for alpha-CDSI and gamma-CDSI, respectively; the Sips and Temkin models were the ones that best fit the experimental data. The deposition and interactions of the dye with the adsorbent surface were confirmed by the analysis of the IR spectra. Desorption studies showed that the material maintained its adsorption capacity of around 90% until the fourth adsorption/desorption cycle. Thus, the materials produced showed to efficiently remove methylene blue and that composite reuse is a viable process for application in dye removal.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionUniv Fed Lavras, Dept Chem, BR-37200900 Lavras, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Inst Sci & Technol, Sorocaba, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Inst Sci & Technol, Sorocaba, Brazil-
Descrição: dc.descriptionFAPEMIG: APQ 00687-13-
Descrição: dc.descriptionCAPES: A107/2013-
Formato: dc.format11-
Idioma: dc.languageen-
Publicador: dc.publisherTaylor & Francis Inc-
Relação: dc.relationJournal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineering-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectRemoval-
Palavras-chave: dc.subjectInclusion complexes-
Palavras-chave: dc.subjectKinetic-
Palavras-chave: dc.subjectIsotherm-
Palavras-chave: dc.subjectDye-
Palavras-chave: dc.subjectMethylene blue-
Título: dc.titleAdsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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