Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH

The ultraviolet light activation of persulfate (PS) under alkaline conditions was evaluated for treating hexacyanoferrate (III) ion ([Fe(CN)6]3-). The effect of the wavelength type (i.e., UVA and UVC), initial PS concentration (0.3, 0.6, and 0.9 g L−1), and pH value (11 and 13) on the degradation of...

Full description

Autores:
Ibargüen-López, Héctor
López-Balanta, Brian
Betancourt Buitrago, Luis Andrés
Serna-Galvis, Efraim A.
Torres-Palma, Ricardo A.
Machuca-Martinez, Fiderman
Castilla-Acevedo, Samir
Tipo de recurso:
http://purl.org/coar/resource_type/c_816b
Fecha de publicación:
2021
Institución:
Corporación Universidad de la Costa
Repositorio:
REDICUC - Repositorio CUC
Idioma:
eng
OAI Identifier:
oai:repositorio.cuc.edu.co:11323/8686
Acceso en línea:
https://hdl.handle.net/11323/8686
https://doi.org/10.1016/j.jece.2021.106233
https://repositorio.cuc.edu.co/
Palabra clave:
Persulfate
Mining wastewater
Advanced oxidation processes
Ultraviolet light
Hexacyanoferrate (III) ion
Free cyanide
Rights
openAccess
License
CC0 1.0 Universal
id RCUC2_37cb2f72c7dbbfb65535813d43b568d8
oai_identifier_str oai:repositorio.cuc.edu.co:11323/8686
network_acronym_str RCUC2
network_name_str REDICUC - Repositorio CUC
repository_id_str
dc.title.spa.fl_str_mv Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
title Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
spellingShingle Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
Persulfate
Mining wastewater
Advanced oxidation processes
Ultraviolet light
Hexacyanoferrate (III) ion
Free cyanide
title_short Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
title_full Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
title_fullStr Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
title_full_unstemmed Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
title_sort Degradation of hexacyanoferrate (III) ion by the coupling of the ultraviolet light and the activation of persulfate at basic pH
dc.creator.fl_str_mv Ibargüen-López, Héctor
López-Balanta, Brian
Betancourt Buitrago, Luis Andrés
Serna-Galvis, Efraim A.
Torres-Palma, Ricardo A.
Machuca-Martinez, Fiderman
Castilla-Acevedo, Samir
dc.contributor.author.spa.fl_str_mv Ibargüen-López, Héctor
López-Balanta, Brian
Betancourt Buitrago, Luis Andrés
Serna-Galvis, Efraim A.
Torres-Palma, Ricardo A.
Machuca-Martinez, Fiderman
Castilla-Acevedo, Samir
dc.subject.spa.fl_str_mv Persulfate
Mining wastewater
Advanced oxidation processes
Ultraviolet light
Hexacyanoferrate (III) ion
Free cyanide
topic Persulfate
Mining wastewater
Advanced oxidation processes
Ultraviolet light
Hexacyanoferrate (III) ion
Free cyanide
description The ultraviolet light activation of persulfate (PS) under alkaline conditions was evaluated for treating hexacyanoferrate (III) ion ([Fe(CN)6]3-). The effect of the wavelength type (i.e., UVA and UVC), initial PS concentration (0.3, 0.6, and 0.9 g L−1), and pH value (11 and 13) on the degradation of 50 mg L−1 of [Fe(CN)6]3- were studied. Finally, the role of the main degrading agents (SO4•-, O2•-, or HO•) involved in the degradation process was determined using scavengers and a degradation pathway for [Fe(CN)6]3- was proposed. Results show that [Fe(CN)6]3- can be decomposed by UVC light, while UVA is not effective neither in [Fe(CN)6]3- photolysis nor in the activation of PS. Alkaline activation alone at pH 13 can also not degrade the cyanocomplex. However, the combination of UVC with PS (0.3 g L−1) at pH 13 showed high efficiency in the elimination of [Fe(CN)6]3-, achieving 93.3% of removal after 125 min of treatment. The highest CN- release and Fe dissolved removal also occurs at pH 13 and 0.3 g L−1 PS. Further increases in initial PS concentrations may lead to an excess of radicals in solution, resulting in detrimental recombination reactions that affect the efficiency of the process. Quenching tests showed that the importance of radicals involved in the degradation of [Fe(CN)6]3- follows the order: HO• > O2•- >>> 1O2 or SO4•-, and allowed to demonstrate that singlet oxygen could participate in the UVC photolysis of [Fe(CN)6]3-. All these results suggest the feasibility of this technology to treat this type of industrial wastewater efficiently.
publishDate 2021
dc.date.accessioned.none.fl_str_mv 2021-09-13T20:07:52Z
dc.date.available.none.fl_str_mv 2021-09-13T20:07:52Z
dc.date.issued.none.fl_str_mv 2021
dc.date.embargoEnd.none.fl_str_mv 2023
dc.type.spa.fl_str_mv Pre-Publicación
dc.type.coar.spa.fl_str_mv http://purl.org/coar/resource_type/c_816b
dc.type.content.spa.fl_str_mv Text
dc.type.driver.spa.fl_str_mv info:eu-repo/semantics/preprint
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dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
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dc.identifier.issn.spa.fl_str_mv 2213-3437
dc.identifier.uri.spa.fl_str_mv https://hdl.handle.net/11323/8686
dc.identifier.doi.spa.fl_str_mv https://doi.org/10.1016/j.jece.2021.106233
dc.identifier.instname.spa.fl_str_mv Corporación Universidad de la Costa
dc.identifier.reponame.spa.fl_str_mv REDICUC - Repositorio CUC
dc.identifier.repourl.spa.fl_str_mv https://repositorio.cuc.edu.co/
identifier_str_mv 2213-3437
Corporación Universidad de la Costa
REDICUC - Repositorio CUC
url https://hdl.handle.net/11323/8686
https://doi.org/10.1016/j.jece.2021.106233
https://repositorio.cuc.edu.co/
dc.language.iso.none.fl_str_mv eng
language eng
dc.rights.spa.fl_str_mv CC0 1.0 Universal
dc.rights.uri.spa.fl_str_mv http://creativecommons.org/publicdomain/zero/1.0/
dc.rights.accessrights.spa.fl_str_mv info:eu-repo/semantics/openAccess
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rights_invalid_str_mv CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/
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eu_rights_str_mv openAccess
dc.format.mimetype.spa.fl_str_mv application/pdf
dc.publisher.spa.fl_str_mv Corporación Universidad de la Costa
dc.source.spa.fl_str_mv Journal of Environmental Chemical Engineering
institution Corporación Universidad de la Costa
dc.source.url.spa.fl_str_mv https://www.sciencedirect.com/science/article/abs/pii/S2213343721012100?via%3Dihub
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spelling Ibargüen-López, HéctorLópez-Balanta, BrianBetancourt Buitrago, Luis AndrésSerna-Galvis, Efraim A.Torres-Palma, Ricardo A.Machuca-Martinez, FidermanCastilla-Acevedo, Samir2021-09-13T20:07:52Z2021-09-13T20:07:52Z202120232213-3437https://hdl.handle.net/11323/8686https://doi.org/10.1016/j.jece.2021.106233Corporación Universidad de la CostaREDICUC - Repositorio CUChttps://repositorio.cuc.edu.co/The ultraviolet light activation of persulfate (PS) under alkaline conditions was evaluated for treating hexacyanoferrate (III) ion ([Fe(CN)6]3-). The effect of the wavelength type (i.e., UVA and UVC), initial PS concentration (0.3, 0.6, and 0.9 g L−1), and pH value (11 and 13) on the degradation of 50 mg L−1 of [Fe(CN)6]3- were studied. Finally, the role of the main degrading agents (SO4•-, O2•-, or HO•) involved in the degradation process was determined using scavengers and a degradation pathway for [Fe(CN)6]3- was proposed. Results show that [Fe(CN)6]3- can be decomposed by UVC light, while UVA is not effective neither in [Fe(CN)6]3- photolysis nor in the activation of PS. Alkaline activation alone at pH 13 can also not degrade the cyanocomplex. However, the combination of UVC with PS (0.3 g L−1) at pH 13 showed high efficiency in the elimination of [Fe(CN)6]3-, achieving 93.3% of removal after 125 min of treatment. The highest CN- release and Fe dissolved removal also occurs at pH 13 and 0.3 g L−1 PS. Further increases in initial PS concentrations may lead to an excess of radicals in solution, resulting in detrimental recombination reactions that affect the efficiency of the process. Quenching tests showed that the importance of radicals involved in the degradation of [Fe(CN)6]3- follows the order: HO• > O2•- >>> 1O2 or SO4•-, and allowed to demonstrate that singlet oxygen could participate in the UVC photolysis of [Fe(CN)6]3-. 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