Application of a new carboxylate-functionalized sugarcane bagasse for adsorptive removal of crystal violet from aqueous solution : kinetic, equilibrium and thermodynamic studies.

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorFerreira, Bruno Christiano Silva-
Autor(es): dc.creatorTeodoro, Filipe Simões-
Autor(es): dc.creatorMageste, Aparecida Barbosa-
Autor(es): dc.creatorGil, Laurent Frédéric-
Autor(es): dc.creatorFreitas, Rossimiriam Pereira de-
Autor(es): dc.creatorGurgel, Leandro Vinícius Alves-
Data de aceite: dc.date.accessioned2019-11-06T13:35:45Z-
Data de disponibilização: dc.date.available2019-11-06T13:35:45Z-
Data de envio: dc.date.issued2015-12-15-
Data de envio: dc.date.issued2015-12-15-
Data de envio: dc.date.issued2015-
Fonte completa do material: dc.identifierhttp://www.repositorio.ufop.br/handle/123456789/5976-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/558974-
Descrição: dc.descriptionA new carboxylate-functionalized sugarcane bagasse (SMA) was prepared via a solvent-free procedure involving esterification of sugarcane bagasse with Meldrum’s acid. The optimized conditions provided SMA with a percent weight gain of 86.0% and 4.69±0.20 mmol/g of carboxylic acid groups. SMA was characterized by FTIR, TGA, elemental analysis and SEM. Kinetic experiments showed that the amount of crystal violet adsorbed increased with increasing temperature and equilibrium was reached at 12 h. Adsorption kinetics followed a pseudo-second-order model. The Arrhenius and Eyring models were used to obtain the activation energy and changes in free energy, enthalpy, and entropy of activation for the adsorption process. The calculated activation energy (14.14 kJ/mol) suggested physical adsorption of CV onto SMA. The equilibrium data were well fitted to the Langmuir and Sips isotherms. Maximum adsorption capacity was 692.1 mg/g at 45 ◦C. Thermodynamic parameters such as changes in free energy, enthalpy and entropy were also determined.-
Idioma: dc.languageen-
Direitos: dc.rightsO Periódico Industrial Crops and Products concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3734740524733.-
Palavras-chave: dc.subjectSugarcane bagasse-
Palavras-chave: dc.subjectCrystal violet-
Palavras-chave: dc.subjectMeldrum's acid-
Título: dc.titleApplication of a new carboxylate-functionalized sugarcane bagasse for adsorptive removal of crystal violet from aqueous solution : kinetic, equilibrium and thermodynamic studies.-
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