Use of modified zeolites CaX and MgX as adsorbents of organic compounds

Detalhes bibliográficos
Autor(a) principal: Miotto, Denise Maria Malachini
Data de Publicação: 2008
Outros Autores: Machado, Nádia Regina Camargo Fernandes
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2477
Resumo: In this work, the adsorption capacity of modified zeolites, CaX and MgX, was evaluated in contact with a by-product solution of the stevioside extraction process, a sweetener extracted from Stevia rebaudiana leaves. The effects of adsorption process in the zeolitic structure were evaluated through several characterization techniques. Thermal analysis showed that the adsorbed compounds suffer small structural changes under heating. From infrared spectroscopy, it was verified that the adsorption process doesn't change the zeolite structure. Superficial area and pore volume indicated that adsorption occurs on the external surface and mesopores of the zeolite. Further acidity indicated that the adsorption of colored organic compounds occurs mainly on the compensation cations.
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spelling Use of modified zeolites CaX and MgX as adsorbents of organic compoundsUtilização de zeólitas modificadas CaX e MgX como adsorventes de compostos orgânicoszeólita Xadsorçãoesteviosídeo3.06.00.00-6 Engenharia QuímicaIn this work, the adsorption capacity of modified zeolites, CaX and MgX, was evaluated in contact with a by-product solution of the stevioside extraction process, a sweetener extracted from Stevia rebaudiana leaves. The effects of adsorption process in the zeolitic structure were evaluated through several characterization techniques. Thermal analysis showed that the adsorbed compounds suffer small structural changes under heating. From infrared spectroscopy, it was verified that the adsorption process doesn't change the zeolite structure. Superficial area and pore volume indicated that adsorption occurs on the external surface and mesopores of the zeolite. Further acidity indicated that the adsorption of colored organic compounds occurs mainly on the compensation cations.Neste trabalho, foi avaliada a capacidade de adsorção de zeólitas modificadas, CaX e MgX, em contato com uma solução do subproduto do processo de extração de esteviosídeo, um adoçante extraído das folhas de Stevia rebaudiana. Os efeitos do processo de adsorção na estrutura zeolítica foram avaliados por meio de diversas técnicas de caracterização. As análises térmicas mostraram que os compostos adsorvidos sofrem pequenas mudanças estruturais sob aquecimento. A partir da espectroscopia ao infravermelho, foi verificado que o processo de adsorção não modifica a estrutura da zeólita. As medidas de área superficial e volume de poros indicaram que a adsorção ocorre preferencialmente na superfície externa e nos mesoporos. Finalmente, os resultados de acidez indicaram que a adsorção dos compostos orgânicos coloridos ocorre principalmente nos cátions de compensação.Universidade Estadual De Maringá2008-04-22info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/247710.4025/actascitechnol.v24i0.2477Acta Scientiarum. Technology; Vol 24 (2002); 1627-1635Acta Scientiarum. Technology; v. 24 (2002); 1627-16351806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2477/1558Miotto, Denise Maria MalachiniMachado, Nádia Regina Camargo Fernandesinfo:eu-repo/semantics/openAccess2024-05-17T13:02:44Zoai:periodicos.uem.br/ojs:article/2477Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:02:44Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Use of modified zeolites CaX and MgX as adsorbents of organic compounds
Utilização de zeólitas modificadas CaX e MgX como adsorventes de compostos orgânicos
title Use of modified zeolites CaX and MgX as adsorbents of organic compounds
spellingShingle Use of modified zeolites CaX and MgX as adsorbents of organic compounds
Miotto, Denise Maria Malachini
zeólita X
adsorção
esteviosídeo
3.06.00.00-6 Engenharia Química
title_short Use of modified zeolites CaX and MgX as adsorbents of organic compounds
title_full Use of modified zeolites CaX and MgX as adsorbents of organic compounds
title_fullStr Use of modified zeolites CaX and MgX as adsorbents of organic compounds
title_full_unstemmed Use of modified zeolites CaX and MgX as adsorbents of organic compounds
title_sort Use of modified zeolites CaX and MgX as adsorbents of organic compounds
author Miotto, Denise Maria Malachini
author_facet Miotto, Denise Maria Malachini
Machado, Nádia Regina Camargo Fernandes
author_role author
author2 Machado, Nádia Regina Camargo Fernandes
author2_role author
dc.contributor.author.fl_str_mv Miotto, Denise Maria Malachini
Machado, Nádia Regina Camargo Fernandes
dc.subject.por.fl_str_mv zeólita X
adsorção
esteviosídeo
3.06.00.00-6 Engenharia Química
topic zeólita X
adsorção
esteviosídeo
3.06.00.00-6 Engenharia Química
description In this work, the adsorption capacity of modified zeolites, CaX and MgX, was evaluated in contact with a by-product solution of the stevioside extraction process, a sweetener extracted from Stevia rebaudiana leaves. The effects of adsorption process in the zeolitic structure were evaluated through several characterization techniques. Thermal analysis showed that the adsorbed compounds suffer small structural changes under heating. From infrared spectroscopy, it was verified that the adsorption process doesn't change the zeolite structure. Superficial area and pore volume indicated that adsorption occurs on the external surface and mesopores of the zeolite. Further acidity indicated that the adsorption of colored organic compounds occurs mainly on the compensation cations.
publishDate 2008
dc.date.none.fl_str_mv 2008-04-22
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2477
10.4025/actascitechnol.v24i0.2477
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2477
identifier_str_mv 10.4025/actascitechnol.v24i0.2477
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/2477/1558
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 24 (2002); 1627-1635
Acta Scientiarum. Technology; v. 24 (2002); 1627-1635
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
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