Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds

Background: Arsenic decontamination of drinking water by adsorption is a simple and robust operation. When designing packed bed adsorbers for arsenic, the main problems are the slow diffusion kinetics of As in microporous media and the lack of simple equations for predicting the performance of the e...

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Autores: Sigrist, Mirna Edit, Beldomenico, Horacio Ramon, Tarifa, Enrique Eduardo, Pieck, Carlos Luis, Vera, Carlos Roman
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/54038
Acceso en línea:http://hdl.handle.net/11336/54038
Access Level:acceso abierto
Palabra clave:Adsorption
Arsenic Abatement
Gac
Iron
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
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repository_id_str
dc.title.none.fl_str_mv Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
title Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
spellingShingle Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
Sigrist, Mirna Edit
Adsorption
Arsenic Abatement
Gac
Iron
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
title_short Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
title_full Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
title_fullStr Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
title_full_unstemmed Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
title_sort Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds
dc.creator.none.fl_str_mv Sigrist, Mirna Edit
Beldomenico, Horacio Ramon
Tarifa, Enrique Eduardo
Pieck, Carlos Luis
Vera, Carlos Roman
author Sigrist, Mirna Edit
author_facet Sigrist, Mirna Edit
Beldomenico, Horacio Ramon
Tarifa, Enrique Eduardo
Pieck, Carlos Luis
Vera, Carlos Roman
author_role author
author2 Beldomenico, Horacio Ramon
Tarifa, Enrique Eduardo
Pieck, Carlos Luis
Vera, Carlos Roman
author2_role author
author
author
author
dc.subject.none.fl_str_mv Adsorption
Arsenic Abatement
Gac
Iron
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
topic Adsorption
Arsenic Abatement
Gac
Iron
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
description Background: Arsenic decontamination of drinking water by adsorption is a simple and robust operation. When designing packed bed adsorbers for arsenic, the main problems are the slow diffusion kinetics of As in microporous media and the lack of simple equations for predicting the performance of the equipment. Commercial iron-doped granular activated carbon adsorbents (Fe/GAC) for groundwater arsenic abatement were studied in this work. Basic parameters for arsenate (AsV) adsorption were measured and their performance at larger scale was simulated with an approximate analytical model. Results: In the 0-300 μgAs L-1 range, the AsV adsorption isotherm on Fe/GAC was found to be approximately linear. Assuming Henry's law for adsorption and homogeneous surface diffusion with constant diffusivity for intrapellet mass transfer, an approximate model for flow and adsorption of arsenate inside packed bed adsorbers was developed, and reduced to an analytic compact solution using the quasi-lognormal distribution (Q-LND) approximation. The use of this model with fitted and reported parameters enabled the approximate simulation of industrial adsorbers and home point-of-use filters. Results show that industrial adsorbers meet the breakthrough condition with incomplete utilization of the adsorbent unless convenient process configurations are used. In point-of-use systems with short residence times intraparticle diffusion would drastically reduce the adsorbent performance. Conclusion: Assuming linear adsorption of AsV over Fe/GAC, an analytical approximate solution for flow and adsorption in packed beds can be obtained. The model seems to represent correctly the main features of industrial and home filters, however, more experimental data is necessary for scale-up purposes.
publishDate 2011
dc.date.none.fl_str_mv 2011-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/54038
Sigrist, Mirna Edit; Beldomenico, Horacio Ramon; Tarifa, Enrique Eduardo; Pieck, Carlos Luis; Vera, Carlos Roman; Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds; John Wiley & Sons Ltd; Journal of Chemical Technology and Biotechnology; 86; 10; 10-2011; 1256-1264
0268-2575
CONICET Digital
CONICET
url http://hdl.handle.net/11336/54038
identifier_str_mv Sigrist, Mirna Edit; Beldomenico, Horacio Ramon; Tarifa, Enrique Eduardo; Pieck, Carlos Luis; Vera, Carlos Roman; Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds; John Wiley & Sons Ltd; Journal of Chemical Technology and Biotechnology; 86; 10; 10-2011; 1256-1264
0268-2575
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1002/jctb.2638
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv John Wiley & Sons Ltd
publisher.none.fl_str_mv John Wiley & Sons Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1799195060637532160
spelling Modelling diffusion and adsorption of As species in Fe/GAC adsorbent bedsSigrist, Mirna EditBeldomenico, Horacio RamonTarifa, Enrique EduardoPieck, Carlos LuisVera, Carlos RomanAdsorptionArsenic AbatementGacIronhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Background: Arsenic decontamination of drinking water by adsorption is a simple and robust operation. When designing packed bed adsorbers for arsenic, the main problems are the slow diffusion kinetics of As in microporous media and the lack of simple equations for predicting the performance of the equipment. Commercial iron-doped granular activated carbon adsorbents (Fe/GAC) for groundwater arsenic abatement were studied in this work. Basic parameters for arsenate (AsV) adsorption were measured and their performance at larger scale was simulated with an approximate analytical model. Results: In the 0-300 μgAs L-1 range, the AsV adsorption isotherm on Fe/GAC was found to be approximately linear. Assuming Henry's law for adsorption and homogeneous surface diffusion with constant diffusivity for intrapellet mass transfer, an approximate model for flow and adsorption of arsenate inside packed bed adsorbers was developed, and reduced to an analytic compact solution using the quasi-lognormal distribution (Q-LND) approximation. The use of this model with fitted and reported parameters enabled the approximate simulation of industrial adsorbers and home point-of-use filters. Results show that industrial adsorbers meet the breakthrough condition with incomplete utilization of the adsorbent unless convenient process configurations are used. In point-of-use systems with short residence times intraparticle diffusion would drastically reduce the adsorbent performance. Conclusion: Assuming linear adsorption of AsV over Fe/GAC, an analytical approximate solution for flow and adsorption in packed beds can be obtained. The model seems to represent correctly the main features of industrial and home filters, however, more experimental data is necessary for scale-up purposes.Fil: Sigrist, Mirna Edit. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Programa de Investigación y Análisis de Residuos y Contaminantes Químicos; ArgentinaFil: Beldomenico, Horacio Ramon. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Programa de Investigación y Análisis de Residuos y Contaminantes Químicos; ArgentinaFil: Tarifa, Enrique Eduardo. Universidad Nacional de Jujuy. Facultad de Ingeniería; ArgentinaFil: Pieck, Carlos Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaFil: Vera, Carlos Roman. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera". Universidad Nacional del Litoral. Instituto de Investigaciones en Catálisis y Petroquímica "Ing. José Miguel Parera"; ArgentinaJohn Wiley & Sons Ltd2011-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/54038Sigrist, Mirna Edit; Beldomenico, Horacio Ramon; Tarifa, Enrique Eduardo; Pieck, Carlos Luis; Vera, Carlos Roman; Modelling diffusion and adsorption of As species in Fe/GAC adsorbent beds; John Wiley & Sons Ltd; Journal of Chemical Technology and Biotechnology; 86; 10; 10-2011; 1256-12640268-2575CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1002/jctb.2638info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T13:42:32Zoai:ri.conicet.gov.ar:11336/54038instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 13:42:33.072CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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