Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes

The ultraviolet light activation of persulfate (PS) was evaluated for the degradation of cobalt cyanocomplexes, which are considered as some of the most recalcitrant compounds present in mining wastewater. The influence of the solution pH (11 and 13), initial concentration of PS (0.1, 0.3, 0.5, 0.7...

Full description

Autores:
Castilla-Acevedo, Samir
Betancourt Buitrago, Luis Andrés
Demetriou Dionysiou, Dionysios
Machuca-Martínez, Fiderman
Tipo de recurso:
http://purl.org/coar/resource_type/c_816b
Fecha de publicación:
2020
Institución:
Corporación Universidad de la Costa
Repositorio:
REDICUC - Repositorio CUC
Idioma:
eng
OAI Identifier:
oai:repositorio.cuc.edu.co:11323/6143
Acceso en línea:
https://hdl.handle.net/11323/6143
https://doi.org/10.1016/j.jhazmat.2020.122389
https://repositorio.cuc.edu.co/
Palabra clave:
Wastewater treatment
AOPs
Gold mining
Persulfate activation
Cyanide complexes
Dissolved oxygen
Rights
openAccess
License
CC0 1.0 Universal
id RCUC2_ef8436d892b1ac6855aea9a56db900c1
oai_identifier_str oai:repositorio.cuc.edu.co:11323/6143
network_acronym_str RCUC2
network_name_str REDICUC - Repositorio CUC
repository_id_str
dc.title.spa.fl_str_mv Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
title Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
spellingShingle Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
Wastewater treatment
AOPs
Gold mining
Persulfate activation
Cyanide complexes
Dissolved oxygen
title_short Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
title_full Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
title_fullStr Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
title_full_unstemmed Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
title_sort Ultraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes
dc.creator.fl_str_mv Castilla-Acevedo, Samir
Betancourt Buitrago, Luis Andrés
Demetriou Dionysiou, Dionysios
Machuca-Martínez, Fiderman
dc.contributor.author.spa.fl_str_mv Castilla-Acevedo, Samir
Betancourt Buitrago, Luis Andrés
Demetriou Dionysiou, Dionysios
Machuca-Martínez, Fiderman
dc.subject.spa.fl_str_mv Wastewater treatment
AOPs
Gold mining
Persulfate activation
Cyanide complexes
Dissolved oxygen
topic Wastewater treatment
AOPs
Gold mining
Persulfate activation
Cyanide complexes
Dissolved oxygen
description The ultraviolet light activation of persulfate (PS) was evaluated for the degradation of cobalt cyanocomplexes, which are considered as some of the most recalcitrant compounds present in mining wastewater. The influence of the solution pH (11 and 13), initial concentration of PS (0.1, 0.3, 0.5, 0.7 and 0.9 g/L), dissolved oxygen and initial concentration of contaminant were evaluated. Photolysis results showed that CoCN63- is photosensitive to UVC radiation, while the activation of PS by alkaline pH does not contribute to the degradation of the cyanocomplex. There was no presence of CN- at both solution pH values using UVC/PS. But at pH 13, the degradation of cobalt cyanocomplexes and the pseudo-first-order rate constant increased. This was attributed to the effective conversion of SO4•- to HO• and to the increase in the oxidative photolysis of PS at high pH. Additional tests demonstrated better performance of UVC/PS in the absence of oxygen which may be caused by the quenching effect of O2 to the higher energy excited state of the cyanocomplex that must be reached to initiate degradation reactions. Increasing the initial concentration of CoCN63- will increase the amount of Co removed but it represents the higher specific energy consumption.
publishDate 2020
dc.date.accessioned.none.fl_str_mv 2020-03-29T14:01:52Z
dc.date.available.none.fl_str_mv 2020-03-29T14:01:52Z
dc.date.issued.none.fl_str_mv 2020-03-06
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
dc.type.redcol.spa.fl_str_mv http://purl.org/redcol/resource_type/ARTOTR
dc.type.version.spa.fl_str_mv info:eu-repo/semantics/acceptedVersion
format http://purl.org/coar/resource_type/c_816b
status_str acceptedVersion
dc.identifier.uri.spa.fl_str_mv https://hdl.handle.net/11323/6143
dc.identifier.doi.spa.fl_str_mv https://doi.org/10.1016/j.jhazmat.2020.122389
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/
url https://hdl.handle.net/11323/6143
https://doi.org/10.1016/j.jhazmat.2020.122389
https://repositorio.cuc.edu.co/
identifier_str_mv Corporación Universidad de la Costa
REDICUC - Repositorio CUC
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
dc.rights.coar.spa.fl_str_mv http://purl.org/coar/access_right/c_abf2
rights_invalid_str_mv CC0 1.0 Universal
http://creativecommons.org/publicdomain/zero/1.0/
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.publisher.spa.fl_str_mv Universidad de la Costa
institution Corporación Universidad de la Costa
bitstream.url.fl_str_mv https://repositorio.cuc.edu.co/bitstreams/c9b91bcb-6d61-47b5-b9b3-296c9f0b1b0e/download
https://repositorio.cuc.edu.co/bitstreams/df8a3255-23f1-46d9-b712-08554ab0e33f/download
https://repositorio.cuc.edu.co/bitstreams/e1d3713e-fd77-43ae-be01-3a6b327505df/download
https://repositorio.cuc.edu.co/bitstreams/e9626549-208c-412d-ba1e-c4da8746e960/download
https://repositorio.cuc.edu.co/bitstreams/ae875802-8f50-4eec-8735-7f64dd607a5e/download
bitstream.checksum.fl_str_mv 07ce1e6c2d211eb1411297347944942c
42fd4ad1e89814f5e4a476b409eb708c
8a4605be74aa9ea9d79846c1fba20a33
f02a8a3cde882f364f250223f828b3d3
bdd4c9ce2f23d66cedbbf8308247b953
bitstream.checksumAlgorithm.fl_str_mv MD5
MD5
MD5
MD5
MD5
repository.name.fl_str_mv Repositorio de la Universidad de la Costa CUC
repository.mail.fl_str_mv repdigital@cuc.edu.co
_version_ 1811760710368100352
spelling Castilla-Acevedo, SamirBetancourt Buitrago, Luis AndrésDemetriou Dionysiou, DionysiosMachuca-Martínez, Fiderman2020-03-29T14:01:52Z2020-03-29T14:01:52Z2020-03-06https://hdl.handle.net/11323/6143https://doi.org/10.1016/j.jhazmat.2020.122389Corporación Universidad de la CostaREDICUC - Repositorio CUChttps://repositorio.cuc.edu.co/The ultraviolet light activation of persulfate (PS) was evaluated for the degradation of cobalt cyanocomplexes, which are considered as some of the most recalcitrant compounds present in mining wastewater. The influence of the solution pH (11 and 13), initial concentration of PS (0.1, 0.3, 0.5, 0.7 and 0.9 g/L), dissolved oxygen and initial concentration of contaminant were evaluated. Photolysis results showed that CoCN63- is photosensitive to UVC radiation, while the activation of PS by alkaline pH does not contribute to the degradation of the cyanocomplex. There was no presence of CN- at both solution pH values using UVC/PS. But at pH 13, the degradation of cobalt cyanocomplexes and the pseudo-first-order rate constant increased. This was attributed to the effective conversion of SO4•- to HO• and to the increase in the oxidative photolysis of PS at high pH. Additional tests demonstrated better performance of UVC/PS in the absence of oxygen which may be caused by the quenching effect of O2 to the higher energy excited state of the cyanocomplex that must be reached to initiate degradation reactions. Increasing the initial concentration of CoCN63- will increase the amount of Co removed but it represents the higher specific energy consumption.Castilla-Acevedo, Samir-will be generated-orcid-0000-0002-1218-4623-600Betancourt Buitrago, Luis Andrés-will be generated-orcid-0000-0002-3931-5080-600Demetriou Dionysiou, DionysiosMachuca-Martínez, FidermanengUniversidad de la CostaCC0 1.0 Universalhttp://creativecommons.org/publicdomain/zero/1.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Wastewater treatmentAOPsGold miningPersulfate activationCyanide complexesDissolved oxygenUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexesPre-Publicaciónhttp://purl.org/coar/resource_type/c_816bTextinfo:eu-repo/semantics/preprinthttp://purl.org/redcol/resource_type/ARTOTRinfo:eu-repo/semantics/acceptedVersionPublicationORIGINALUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdfUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdfapplication/pdf320567https://repositorio.cuc.edu.co/bitstreams/c9b91bcb-6d61-47b5-b9b3-296c9f0b1b0e/download07ce1e6c2d211eb1411297347944942cMD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8701https://repositorio.cuc.edu.co/bitstreams/df8a3255-23f1-46d9-b712-08554ab0e33f/download42fd4ad1e89814f5e4a476b409eb708cMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.cuc.edu.co/bitstreams/e1d3713e-fd77-43ae-be01-3a6b327505df/download8a4605be74aa9ea9d79846c1fba20a33MD53THUMBNAILUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdf.jpgUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdf.jpgimage/jpeg53213https://repositorio.cuc.edu.co/bitstreams/e9626549-208c-412d-ba1e-c4da8746e960/downloadf02a8a3cde882f364f250223f828b3d3MD54TEXTUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdf.txtUltraviolet light-mediated activation of persulfate for the degradation of cobalt cyanocomplexes.pdf.txttext/plain1645https://repositorio.cuc.edu.co/bitstreams/ae875802-8f50-4eec-8735-7f64dd607a5e/downloadbdd4c9ce2f23d66cedbbf8308247b953MD5511323/6143oai:repositorio.cuc.edu.co:11323/61432024-09-17 10:44:44.394http://creativecommons.org/publicdomain/zero/1.0/CC0 1.0 Universalopen.accesshttps://repositorio.cuc.edu.coRepositorio de la Universidad de la Costa CUCrepdigital@cuc.edu.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