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...
- 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
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|
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 |
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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.coTk9URTogUExBQ0UgWU9VUiBPV04gTElDRU5TRSBIRVJFClRoaXMgc2FtcGxlIGxpY2Vuc2UgaXMgcHJvdmlkZWQgZm9yIGluZm9ybWF0aW9uYWwgcHVycG9zZXMgb25seS4KCk5PTi1FWENMVVNJVkUgRElTVFJJQlVUSU9OIExJQ0VOU0UKCkJ5IHNpZ25pbmcgYW5kIHN1Ym1pdHRpbmcgdGhpcyBsaWNlbnNlLCB5b3UgKHRoZSBhdXRob3Iocykgb3IgY29weXJpZ2h0Cm93bmVyKSBncmFudHMgdG8gRFNwYWNlIFVuaXZlcnNpdHkgKERTVSkgdGhlIG5vbi1leGNsdXNpdmUgcmlnaHQgdG8gcmVwcm9kdWNlLAp0cmFuc2xhdGUgKGFzIGRlZmluZWQgYmVsb3cpLCBhbmQvb3IgZGlzdHJpYnV0ZSB5b3VyIHN1Ym1pc3Npb24gKGluY2x1ZGluZwp0aGUgYWJzdHJhY3QpIHdvcmxkd2lkZSBpbiBwcmludCBhbmQgZWxlY3Ryb25pYyBmb3JtYXQgYW5kIGluIGFueSBtZWRpdW0sCmluY2x1ZGluZyBidXQgbm90IGxpbWl0ZWQgdG8gYXVkaW8gb3IgdmlkZW8uCgpZb3UgYWdyZWUgdGhhdCBEU1UgbWF5LCB3aXRob3V0IGNoYW5naW5nIHRoZSBjb250ZW50LCB0cmFuc2xhdGUgdGhlCnN1Ym1pc3Npb24gdG8gYW55IG1lZGl1bSBvciBmb3JtYXQgZm9yIHRoZSBwdXJwb3NlIG9mIHByZXNlcnZhdGlvbi4KCllvdSBhbHNvIGFncmVlIHRoYXQgRFNVIG1heSBrZWVwIG1vcmUgdGhhbiBvbmUgY29weSBvZiB0aGlzIHN1Ym1pc3Npb24gZm9yCnB1cnBvc2VzIG9mIHNlY3VyaXR5LCBiYWNrLXVwIGFuZCBwcmVzZXJ2YXRpb24uCgpZb3UgcmVwcmVzZW50IHRoYXQgdGhlIHN1Ym1pc3Npb24gaXMgeW91ciBvcmlnaW5hbCB3b3JrLCBhbmQgdGhhdCB5b3UgaGF2ZQp0aGUgcmlnaHQgdG8gZ3JhbnQgdGhlIHJpZ2h0cyBjb250YWluZWQgaW4gdGhpcyBsaWNlbnNlLiBZb3UgYWxzbyByZXByZXNlbnQKdGhhdCB5b3VyIHN1Ym1pc3Npb24gZG9lcyBub3QsIHRvIHRoZSBiZXN0IG9mIHlvdXIga25vd2xlZGdlLCBpbmZyaW5nZSB1cG9uCmFueW9uZSdzIGNvcHlyaWdodC4KCklmIHRoZSBzdWJtaXNzaW9uIGNvbnRhaW5zIG1hdGVyaWFsIGZvciB3aGljaCB5b3UgZG8gbm90IGhvbGQgY29weXJpZ2h0LAp5b3UgcmVwcmVzZW50IHRoYXQgeW91IGhhdmUgb2J0YWluZWQgdGhlIHVucmVzdHJpY3RlZCBwZXJtaXNzaW9uIG9mIHRoZQpjb3B5cmlnaHQgb3duZXIgdG8gZ3JhbnQgRFNVIHRoZSByaWdodHMgcmVxdWlyZWQgYnkgdGhpcyBsaWNlbnNlLCBhbmQgdGhhdApzdWNoIHRoaXJkLXBhcnR5IG93bmVkIG1hdGVyaWFsIGlzIGNsZWFybHkgaWRlbnRpZmllZCBhbmQgYWNrbm93bGVkZ2VkCndpdGhpbiB0aGUgdGV4dCBvciBjb250ZW50IG9mIHRoZSBzdWJtaXNzaW9uLgoKSUYgVEhFIFNVQk1JU1NJT04gSVMgQkFTRUQgVVBPTiBXT1JLIFRIQVQgSEFTIEJFRU4gU1BPTlNPUkVEIE9SIFNVUFBPUlRFRApCWSBBTiBBR0VOQ1kgT1IgT1JHQU5JWkFUSU9OIE9USEVSIFRIQU4gRFNVLCBZT1UgUkVQUkVTRU5UIFRIQVQgWU9VIEhBVkUKRlVMRklMTEVEIEFOWSBSSUdIVCBPRiBSRVZJRVcgT1IgT1RIRVIgT0JMSUdBVElPTlMgUkVRVUlSRUQgQlkgU1VDSApDT05UUkFDVCBPUiBBR1JFRU1FTlQuCgpEU1Ugd2lsbCBjbGVhcmx5IGlkZW50aWZ5IHlvdXIgbmFtZShzKSBhcyB0aGUgYXV0aG9yKHMpIG9yIG93bmVyKHMpIG9mIHRoZQpzdWJtaXNzaW9uLCBhbmQgd2lsbCBub3QgbWFrZSBhbnkgYWx0ZXJhdGlvbiwgb3RoZXIgdGhhbiBhcyBhbGxvd2VkIGJ5IHRoaXMKbGljZW5zZSwgdG8geW91ciBzdWJtaXNzaW9uLgo= |