Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977
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dc.contributor.authorALMEIDA, E. S.pt_BR
dc.contributor.authorCARVALHO, A. C. B.pt_BR
dc.contributor.authorSOARES, I. O. de S.pt_BR
dc.contributor.authorVALADARES, L. F.pt_BR
dc.contributor.authorMENDONÇA, A. R. V.pt_BR
dc.contributor.authorSILVA JUNIOR, I. J.pt_BR
dc.contributor.authorMONTEIRO, S.pt_BR
dc.date.accessioned2019-06-22T00:35:13Z-
dc.date.available2019-06-22T00:35:13Z-
dc.date.created2019-06-21
dc.date.issued2019
dc.identifier.citationFood Research International, v. 121, p. 785-797, 2019.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1109977-
dc.descriptionThis 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.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectHybrid palm oilpt_BR
dc.subjectIsothermpt_BR
dc.subjectColor inversionpt_BR
dc.titleElucidating how two different types of bleaching earths widely used in vegetable oils industry remove carotenes from palm oil: equilibrium, kinetics and thermodynamic parameters.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2019-11-18T11:11:11Z
dc.subject.nalthesaurusAdsorptionpt_BR
riaa.ainfo.id1109977pt_BR
riaa.ainfo.lastupdate2019-11-18 -02:00:00
dc.contributor.institutionErislene 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.pt_BR
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