Elucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters.

Detalhes bibliográficos
Autor(a) principal: ALMEIDA, E. S.
Data de Publicação: 2019
Outros Autores: CARVALHO, A. C. B., SOARES, I. O. de S., VALADARES, L. F., MENDONÇA, A. R. V., SILVA JUNIOR, I. J., MONTEIRO, S.
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.
id EMBR_9d9c574d924418fea3971d2d7e7a3b41
oai_identifier_str oai:www.alice.cnptia.embrapa.br:doc/1109977
network_acronym_str EMBR
network_name_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository_id_str 2154
spelling 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
_version_ 1794503476499185664