Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters.
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977 |
Resumo: | This work compared the mechanisms of adsorption of carotenes from hybrid palm oil onto two kinds of bleaching earths widely used by industrial refiners (acid-activated and neutral). First, it was performed a deep characterization of adsorbent surfaces: acid activated adsorbent showed micropore volumes twice larger than the neutral. FTIR analysis of adsorbent after adsorption demonstrated that active site was Si?O?Si for both adsorbents. However, comparison of peak shapes suggested distinctive interactions between adsorbent/adsorbate for each adsorbent. Latterly, an extensive kinetic and equilibrium study was performed. Kinetic data were in accordance with pseudo-first and pseudo-second-order models. Adjusting to the intra-particle diffusion model evidenced more than one mechanism controlling the adsorption process. Equilibrium data demonstrated adsorption is only favorable at low carotene concentration at liquid phase for acid adsorbent (lower than 1 mg/mL). For neutral adsorbent, it was not clearly observed a favorable region with the studied conditions. The acid adsorbent could adsorb more carotenes per adsorbent weight than neutral. Finally, neutral adsorbent showed higher heterogeneity of interaction between adsorbate and adsorbent than the acid, especially at low adsorbent coverages. |
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Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters.Hybrid palm oilIsothermColor inversionAdsorptionThis work compared the mechanisms of adsorption of carotenes from hybrid palm oil onto two kinds of bleaching earths widely used by industrial refiners (acid-activated and neutral). First, it was performed a deep characterization of adsorbent surfaces: acid activated adsorbent showed micropore volumes twice larger than the neutral. FTIR analysis of adsorbent after adsorption demonstrated that active site was Si?O?Si for both adsorbents. However, comparison of peak shapes suggested distinctive interactions between adsorbent/adsorbate for each adsorbent. Latterly, an extensive kinetic and equilibrium study was performed. Kinetic data were in accordance with pseudo-first and pseudo-second-order models. Adjusting to the intra-particle diffusion model evidenced more than one mechanism controlling the adsorption process. Equilibrium data demonstrated adsorption is only favorable at low carotene concentration at liquid phase for acid adsorbent (lower than 1 mg/mL). For neutral adsorbent, it was not clearly observed a favorable region with the studied conditions. The acid adsorbent could adsorb more carotenes per adsorbent weight than neutral. Finally, neutral adsorbent showed higher heterogeneity of interaction between adsorbate and adsorbent than the acid, especially at low adsorbent coverages.Erislene S. Almeida, UnB; Ariane Cristina Boechie Carvalho, UnB; Isabela Oliveira de Souza Soares, UnB; LEONARDO FONSECA VALADARES, CNPAE; Andressa Regina Vasques Mendonça, UnB; Ivanildo José Silva Junior, Universidade Federal do Ceará; Simone Monteiro, UnB.ALMEIDA, E. S.CARVALHO, A. C. B.SOARES, I. O. de S.VALADARES, L. F.MENDONÇA, A. R. V.SILVA JUNIOR, I. J.MONTEIRO, S.2019-06-22T00:35:13Z2019-06-22T00:35:13Z2019-06-2120192019-11-18T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleFood Research International, v. 121, p. 785-797, 2019.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2019-06-22T00:35:19Zoai:www.alice.cnptia.embrapa.br:doc/1109977Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542019-06-22T00:35:19falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542019-06-22T00:35:19Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
title |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
spellingShingle |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. ALMEIDA, E. S. Hybrid palm oil Isotherm Color inversion Adsorption |
title_short |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
title_full |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
title_fullStr |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
title_full_unstemmed |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
title_sort |
Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters. |
author |
ALMEIDA, E. S. |
author_facet |
ALMEIDA, E. S. CARVALHO, A. C. B. SOARES, I. O. de S. VALADARES, L. F. MENDONÇA, A. R. V. SILVA JUNIOR, I. J. MONTEIRO, S. |
author_role |
author |
author2 |
CARVALHO, A. C. B. SOARES, I. O. de S. VALADARES, L. F. MENDONÇA, A. R. V. SILVA JUNIOR, I. J. MONTEIRO, S. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Erislene S. Almeida, UnB; Ariane Cristina Boechie Carvalho, UnB; Isabela Oliveira de Souza Soares, UnB; LEONARDO FONSECA VALADARES, CNPAE; Andressa Regina Vasques Mendonça, UnB; Ivanildo José Silva Junior, Universidade Federal do Ceará; Simone Monteiro, UnB. |
dc.contributor.author.fl_str_mv |
ALMEIDA, E. S. CARVALHO, A. C. B. SOARES, I. O. de S. VALADARES, L. F. MENDONÇA, A. R. V. SILVA JUNIOR, I. J. MONTEIRO, S. |
dc.subject.por.fl_str_mv |
Hybrid palm oil Isotherm Color inversion Adsorption |
topic |
Hybrid palm oil Isotherm Color inversion Adsorption |
description |
This work compared the mechanisms of adsorption of carotenes from hybrid palm oil onto two kinds of bleaching earths widely used by industrial refiners (acid-activated and neutral). First, it was performed a deep characterization of adsorbent surfaces: acid activated adsorbent showed micropore volumes twice larger than the neutral. FTIR analysis of adsorbent after adsorption demonstrated that active site was Si?O?Si for both adsorbents. However, comparison of peak shapes suggested distinctive interactions between adsorbent/adsorbate for each adsorbent. Latterly, an extensive kinetic and equilibrium study was performed. Kinetic data were in accordance with pseudo-first and pseudo-second-order models. Adjusting to the intra-particle diffusion model evidenced more than one mechanism controlling the adsorption process. Equilibrium data demonstrated adsorption is only favorable at low carotene concentration at liquid phase for acid adsorbent (lower than 1 mg/mL). For neutral adsorbent, it was not clearly observed a favorable region with the studied conditions. The acid adsorbent could adsorb more carotenes per adsorbent weight than neutral. Finally, neutral adsorbent showed higher heterogeneity of interaction between adsorbate and adsorbent than the acid, especially at low adsorbent coverages. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-22T00:35:13Z 2019-06-22T00:35:13Z 2019-06-21 2019 2019-11-18T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Food Research International, v. 121, p. 785-797, 2019. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977 |
identifier_str_mv |
Food Research International, v. 121, p. 785-797, 2019. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503476499185664 |