Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products

The anodic oxidation (AO) of 30 pharmaceuticals including antibiotics, hormones, antihistaminics, anti-inflammatories, antidepressants, antihypertensives, and antiulcer agents, in solutions containing different supporting electrolytes media (0.05 M Na2SO4, 0.05 M NaCl, and 0.05 M Na2SO4 + 0.05 M NaC...

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Autores: Calzadilla, Wendy, Espinoza, L. Carolina, Diaz-Cruz, Silvia, Sunyer-Caldú, Adrià, Aranda, Mario, Peña-Farfal, Carlos, Salazar, Ricardo
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/225065
Acceso en línea:http://hdl.handle.net/10261/225065
Access Level:acceso abierto
Palabra clave:Anodic oxidation
Boron-doped diamond electrode
Hydroxyl radical
Pharmaceuticals
Secondary effluent
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spelling Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-productsCalzadilla, WendyEspinoza, L. CarolinaDiaz-Cruz, SilviaSunyer-Caldú, AdriàAranda, MarioPeña-Farfal, CarlosSalazar, RicardoAnodic oxidationBoron-doped diamond electrodeHydroxyl radicalPharmaceuticalsSecondary effluentThe anodic oxidation (AO) of 30 pharmaceuticals including antibiotics, hormones, antihistaminics, anti-inflammatories, antidepressants, antihypertensives, and antiulcer agents, in solutions containing different supporting electrolytes media (0.05 M Na2SO4, 0.05 M NaCl, and 0.05 M Na2SO4 + 0.05 M NaCl) at natural pH was studied. A boron-doped diamond (BDD) electrode and a stainless-steel electrode were used as anode and cathode, respectively, and three current densities of 6, 20, and 40 mA cm−2 were applied. The results showed high mineralization rates, above 85%, in all the tested electrolytic media. 25 intermediaries produced during the electrooxidation were identified, depending on the supporting electrolyte together with the formation of carboxylic acids, NO3−, SO42− and NH4+ ions. The formation of intermediates in chloride medium produced an increase in absorbance. Finally, a real secondary effluent spiked with the 30 pharmaceuticals was treated by AO applying 6 mA cm−2 at natural pH and without addition of supporting electrolyte, reaching c.a. 90% mineralization after 300 min, with an energy consumption of 18.95 kW h m−3 equivalent to 2.90 USD m−3. A degradation scheme for the mixture of emerging contaminants in both electrolytic media is proposed. Thus, the application of anodic oxidation generates a high concentration of hydroxyl radicals that favors the mineralization of the pharmaceuticals present in the spiked secondary effluent sample.The authors are very grateful for the partial financial support of FONDECYT Grant 1170352 and DICYT USACh. W. Calzadilla thanks PFCHA/ANID for the National PhD scholarship 21160273. Authors also acknowledge the partial financial support of the Spanish Ministry of Science and Innovation through the Project ROUSSEAU CTM2017-89767-C3-1-R and Project CEX2018-000794-S.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)Diaz-Cruz, M. Silvia [0000-0003-3331-4076]Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202020202020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/225065reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM2017-89767-C3-1-Rinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CEX2018-000794-Shttps://doi.org/10.1016/j.chemosphere.2020.128753Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2250652026-05-22T06:33:51Z
dc.title.none.fl_str_mv Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
title Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
spellingShingle Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
Calzadilla, Wendy
Anodic oxidation
Boron-doped diamond electrode
Hydroxyl radical
Pharmaceuticals
Secondary effluent
title_short Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
title_full Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
title_fullStr Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
title_full_unstemmed Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
title_sort Simultaneous degradation of 30 pharmaceuticals by anodic oxidation: Main intermediaries and by-products
dc.creator.none.fl_str_mv Calzadilla, Wendy
Espinoza, L. Carolina
Diaz-Cruz, Silvia
Sunyer-Caldú, Adrià
Aranda, Mario
Peña-Farfal, Carlos
Salazar, Ricardo
author Calzadilla, Wendy
author_facet Calzadilla, Wendy
Espinoza, L. Carolina
Diaz-Cruz, Silvia
Sunyer-Caldú, Adrià
Aranda, Mario
Peña-Farfal, Carlos
Salazar, Ricardo
author_role author
author2 Espinoza, L. Carolina
Diaz-Cruz, Silvia
Sunyer-Caldú, Adrià
Aranda, Mario
Peña-Farfal, Carlos
Salazar, Ricardo
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Diaz-Cruz, M. Silvia [0000-0003-3331-4076]
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Anodic oxidation
Boron-doped diamond electrode
Hydroxyl radical
Pharmaceuticals
Secondary effluent
topic Anodic oxidation
Boron-doped diamond electrode
Hydroxyl radical
Pharmaceuticals
Secondary effluent
description The anodic oxidation (AO) of 30 pharmaceuticals including antibiotics, hormones, antihistaminics, anti-inflammatories, antidepressants, antihypertensives, and antiulcer agents, in solutions containing different supporting electrolytes media (0.05 M Na2SO4, 0.05 M NaCl, and 0.05 M Na2SO4 + 0.05 M NaCl) at natural pH was studied. A boron-doped diamond (BDD) electrode and a stainless-steel electrode were used as anode and cathode, respectively, and three current densities of 6, 20, and 40 mA cm−2 were applied. The results showed high mineralization rates, above 85%, in all the tested electrolytic media. 25 intermediaries produced during the electrooxidation were identified, depending on the supporting electrolyte together with the formation of carboxylic acids, NO3−, SO42− and NH4+ ions. The formation of intermediates in chloride medium produced an increase in absorbance. Finally, a real secondary effluent spiked with the 30 pharmaceuticals was treated by AO applying 6 mA cm−2 at natural pH and without addition of supporting electrolyte, reaching c.a. 90% mineralization after 300 min, with an energy consumption of 18.95 kW h m−3 equivalent to 2.90 USD m−3. A degradation scheme for the mixture of emerging contaminants in both electrolytic media is proposed. Thus, the application of anodic oxidation generates a high concentration of hydroxyl radicals that favors the mineralization of the pharmaceuticals present in the spiked secondary effluent sample.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/225065
url http://hdl.handle.net/10261/225065
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTM2017-89767-C3-1-R
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CEX2018-000794-S
https://doi.org/10.1016/j.chemosphere.2020.128753
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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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