The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8

The removal of the toxic arsenic(III) from aqueous solutions is investigated using the ion exchange technology and the Dowex 1x8 resin. Different experimental variables which may influence the uptake equilib-rium are considered: Stirring speed of the system, temperature, NaOH concentration in the so...

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Authors: Alguacil, Francisco José, Escudero, Esther
Format: article
Status:Published version
Publication Date:2018
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/188621
Online Access:http://hdl.handle.net/10261/188621
Access Level:Open access
Keyword:Dowex 1x8
Removal
Multiwalled carbon nanotubes
Liquid effluents
Arsenic(III)
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spelling The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8Alguacil, Francisco JoséEscudero, EstherDowex 1x8RemovalMultiwalled carbon nanotubesLiquid effluentsArsenic(III)The removal of the toxic arsenic(III) from aqueous solutions is investigated using the ion exchange technology and the Dowex 1x8 resin. Different experimental variables which may influence the uptake equilib-rium are considered: Stirring speed of the system, temperature, NaOH concentration in the solution, and resin dosage. The anion exchange equilibrium is endothermic and non-spontaneous, in the 20 °C - 60 °C range of temperatures the metal uptake onto the resin responded to the pseudo-second order kinetic model, however, the loading mechanism is temperature dependent in the 20 °C - 40 °C range. The linear fit of the experimental data showed that the loading isotherm is best explained by the Freundlich model. The results of arsenic(III) uptake in the present system are compared against the metal uptake which one can obtain with other resins and multi-walled carbon nanotubes. Arsenic(III) loaded onto the resin is eluted by the use of 1M HCl solution.To the CSIC (Spain) for support. Also to Mrs. J. Fernandez and Mrs. E. Moroño for assistance in the analytical work.Peer ReviewedEditorial CSICConsejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2019201920182019info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/188621reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.3989/revmetalm.132Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1886212026-05-22T06:33:51Z
dc.title.none.fl_str_mv The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
title The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
spellingShingle The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
Alguacil, Francisco José
Dowex 1x8
Removal
Multiwalled carbon nanotubes
Liquid effluents
Arsenic(III)
title_short The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
title_full The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
title_fullStr The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
title_full_unstemmed The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
title_sort The removal of toxic metals from liquid effluents by ion exchange resins. Part VIII: Arsenic(III)/OH-/Dowex 1x8
dc.creator.none.fl_str_mv Alguacil, Francisco José
Escudero, Esther
author Alguacil, Francisco José
author_facet Alguacil, Francisco José
Escudero, Esther
author_role author
author2 Escudero, Esther
author2_role author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Dowex 1x8
Removal
Multiwalled carbon nanotubes
Liquid effluents
Arsenic(III)
topic Dowex 1x8
Removal
Multiwalled carbon nanotubes
Liquid effluents
Arsenic(III)
description The removal of the toxic arsenic(III) from aqueous solutions is investigated using the ion exchange technology and the Dowex 1x8 resin. Different experimental variables which may influence the uptake equilib-rium are considered: Stirring speed of the system, temperature, NaOH concentration in the solution, and resin dosage. The anion exchange equilibrium is endothermic and non-spontaneous, in the 20 °C - 60 °C range of temperatures the metal uptake onto the resin responded to the pseudo-second order kinetic model, however, the loading mechanism is temperature dependent in the 20 °C - 40 °C range. The linear fit of the experimental data showed that the loading isotherm is best explained by the Freundlich model. The results of arsenic(III) uptake in the present system are compared against the metal uptake which one can obtain with other resins and multi-walled carbon nanotubes. Arsenic(III) loaded onto the resin is eluted by the use of 1M HCl solution.
publishDate 2018
dc.date.none.fl_str_mv 2018
2019
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/188621
url http://hdl.handle.net/10261/188621
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.3989/revmetalm.132
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Editorial CSIC
publisher.none.fl_str_mv Editorial CSIC
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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