Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory

Detalhes bibliográficos
Autor(a) principal: Sellaoui, Lotfi
Data de Publicação: 2017
Outros Autores: Lima, Éder Cláudio, Dotto, Guilherme Luiz, Dias, Silvio Luis Pereira, Lamine, Abedelmottaleb Ben
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/205188
Resumo: Two equilibrium models based on statistical physics, i.e., monolayer model with single energy and multilayer model with saturation, were developed and employed to access the steric and energetic aspects in the adsorption of reactive violet 5 dye (RV-5) on cocoa shell activated carbon (AC) and commercial activated carbon (CAC), at different temperatures (from 298 to 323 K). The results showed that the multilayer model with saturation was able to represent the adsorption system. This model assumes that the adsorption occurs by a formation of certain number of layers. The n values ranged from 1.10 to 2.98, indicating that the adsorbate molecules interacted in an inclined position on the adsorbent surface and aggregate in solution. The study of the total number of the formed layers (1 + L2) showed that the steric hindrance is the dominant factor. The description of the adsorbate–adsorbent interactions by calculation of the adsorption energy indicated that the process occurred by physisorption in nature, since the values were lower than 40 kJ mol−1.
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spelling Sellaoui, LotfiLima, Éder CláudioDotto, Guilherme LuizDias, Silvio Luis PereiraLamine, Abedelmottaleb Ben2020-01-31T04:12:39Z20172211-3797http://hdl.handle.net/10183/205188001095793Two equilibrium models based on statistical physics, i.e., monolayer model with single energy and multilayer model with saturation, were developed and employed to access the steric and energetic aspects in the adsorption of reactive violet 5 dye (RV-5) on cocoa shell activated carbon (AC) and commercial activated carbon (CAC), at different temperatures (from 298 to 323 K). The results showed that the multilayer model with saturation was able to represent the adsorption system. This model assumes that the adsorption occurs by a formation of certain number of layers. The n values ranged from 1.10 to 2.98, indicating that the adsorbate molecules interacted in an inclined position on the adsorbent surface and aggregate in solution. The study of the total number of the formed layers (1 + L2) showed that the steric hindrance is the dominant factor. The description of the adsorbate–adsorbent interactions by calculation of the adsorption energy indicated that the process occurred by physisorption in nature, since the values were lower than 40 kJ mol−1.application/pdfengResults in Physics. Amsterdã/Holanda. Vol. 7 (2017), p. 233-237Carvão ativadoModelagemAgregacaoCasca de cacauCorante de violetaPhysicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theoryEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001095793.pdf.txt001095793.pdf.txtExtracted Texttext/plain24645http://www.lume.ufrgs.br/bitstream/10183/205188/2/001095793.pdf.txtfe43f35cad5eb4350d464bf15d26a6a5MD52ORIGINAL001095793.pdfTexto completo (inglês)application/pdf979012http://www.lume.ufrgs.br/bitstream/10183/205188/1/001095793.pdf236f006d50d6089726dc938b89e9ff2fMD5110183/2051882020-02-01 05:14:25.294537oai:www.lume.ufrgs.br:10183/205188Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2020-02-01T07:14:25Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
title Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
spellingShingle Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
Sellaoui, Lotfi
Carvão ativado
Modelagem
Agregacao
Casca de cacau
Corante de violeta
title_short Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
title_full Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
title_fullStr Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
title_full_unstemmed Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
title_sort Physicochemical modeling of reactive violet 5 dye adsorption on home-made cocoa shell and commercial activated carbons using the statistical physics theory
author Sellaoui, Lotfi
author_facet Sellaoui, Lotfi
Lima, Éder Cláudio
Dotto, Guilherme Luiz
Dias, Silvio Luis Pereira
Lamine, Abedelmottaleb Ben
author_role author
author2 Lima, Éder Cláudio
Dotto, Guilherme Luiz
Dias, Silvio Luis Pereira
Lamine, Abedelmottaleb Ben
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Sellaoui, Lotfi
Lima, Éder Cláudio
Dotto, Guilherme Luiz
Dias, Silvio Luis Pereira
Lamine, Abedelmottaleb Ben
dc.subject.por.fl_str_mv Carvão ativado
Modelagem
Agregacao
Casca de cacau
Corante de violeta
topic Carvão ativado
Modelagem
Agregacao
Casca de cacau
Corante de violeta
description Two equilibrium models based on statistical physics, i.e., monolayer model with single energy and multilayer model with saturation, were developed and employed to access the steric and energetic aspects in the adsorption of reactive violet 5 dye (RV-5) on cocoa shell activated carbon (AC) and commercial activated carbon (CAC), at different temperatures (from 298 to 323 K). The results showed that the multilayer model with saturation was able to represent the adsorption system. This model assumes that the adsorption occurs by a formation of certain number of layers. The n values ranged from 1.10 to 2.98, indicating that the adsorbate molecules interacted in an inclined position on the adsorbent surface and aggregate in solution. The study of the total number of the formed layers (1 + L2) showed that the steric hindrance is the dominant factor. The description of the adsorbate–adsorbent interactions by calculation of the adsorption energy indicated that the process occurred by physisorption in nature, since the values were lower than 40 kJ mol−1.
publishDate 2017
dc.date.issued.fl_str_mv 2017
dc.date.accessioned.fl_str_mv 2020-01-31T04:12:39Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/205188
dc.identifier.issn.pt_BR.fl_str_mv 2211-3797
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Results in Physics. Amsterdã/Holanda. Vol. 7 (2017), p. 233-237
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