Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins
Autor(a) principal: | |
---|---|
Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1080/10934529.2022.2119040 http://hdl.handle.net/11449/237686 |
Resumo: | The 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. |
id |
UNSP_ca0291da918d686b210775f6beacab0b |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/237686 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
spelling |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrinsRemovalInclusion complexesKineticIsothermDyeMethylene blueThe 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.Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed Lavras, Dept Chem, BR-37200900 Lavras, BrazilSao Paulo State Univ, Inst Sci & Technol, Sorocaba, BrazilSao Paulo State Univ, Inst Sci & Technol, Sorocaba, BrazilFAPEMIG: APQ 00687-13CAPES: A107/2013Taylor & Francis IncUniversidade Federal de Lavras (UFLA)Universidade Estadual Paulista (UNESP)Carvalho, Lucas Braganca [UNESP]Baracho, Raphaela do ValeAndrade, Jessica MoreiraMagriotis, Zuy MariaPinto, Luciana Matos Alves2022-11-30T13:41:55Z2022-11-30T13:41:55Z2022-08-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article11http://dx.doi.org/10.1080/10934529.2022.2119040Journal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineering. Philadelphia: Taylor & Francis Inc, 11 p., 2022.1093-4529http://hdl.handle.net/11449/23768610.1080/10934529.2022.2119040WOS:000851285600001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineeringinfo:eu-repo/semantics/openAccess2022-11-30T13:41:55Zoai:repositorio.unesp.br:11449/237686Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:54:41.482691Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
title |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
spellingShingle |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins Carvalho, Lucas Braganca [UNESP] Removal Inclusion complexes Kinetic Isotherm Dye Methylene blue |
title_short |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
title_full |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
title_fullStr |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
title_full_unstemmed |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
title_sort |
Adsorption studies of the hybrid material obtained from the functionalization of silica with alfa and gamma cyclodextrins |
author |
Carvalho, Lucas Braganca [UNESP] |
author_facet |
Carvalho, Lucas Braganca [UNESP] Baracho, Raphaela do Vale Andrade, Jessica Moreira Magriotis, Zuy Maria Pinto, Luciana Matos Alves |
author_role |
author |
author2 |
Baracho, Raphaela do Vale Andrade, Jessica Moreira Magriotis, Zuy Maria Pinto, Luciana Matos Alves |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Lavras (UFLA) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Carvalho, Lucas Braganca [UNESP] Baracho, Raphaela do Vale Andrade, Jessica Moreira Magriotis, Zuy Maria Pinto, Luciana Matos Alves |
dc.subject.por.fl_str_mv |
Removal Inclusion complexes Kinetic Isotherm Dye Methylene blue |
topic |
Removal Inclusion complexes Kinetic Isotherm Dye Methylene blue |
description |
The 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. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-11-30T13:41:55Z 2022-11-30T13:41:55Z 2022-08-29 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1080/10934529.2022.2119040 Journal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineering. Philadelphia: Taylor & Francis Inc, 11 p., 2022. 1093-4529 http://hdl.handle.net/11449/237686 10.1080/10934529.2022.2119040 WOS:000851285600001 |
url |
http://dx.doi.org/10.1080/10934529.2022.2119040 http://hdl.handle.net/11449/237686 |
identifier_str_mv |
Journal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineering. Philadelphia: Taylor & Francis Inc, 11 p., 2022. 1093-4529 10.1080/10934529.2022.2119040 WOS:000851285600001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Environmental Science And Health Part A-toxic/hazardous Substances & Environmental Engineering |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
11 |
dc.publisher.none.fl_str_mv |
Taylor & Francis Inc |
publisher.none.fl_str_mv |
Taylor & Francis Inc |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129563725660160 |