Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment

The widespread occurrence of cyanotoxins in water bodies presents a significant health risk due to their high toxicity and persistence in the environment. Exposure to these toxins can lead to severe health issues, from gastrointestinal distress to organ failure, underscoring the urgent need for adva...

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Detalles Bibliográficos
Autores: Ortiz Suárez, David, Cires Gómez, Samuel, Martínez de Pedro, Zahara, Quesada del Corral, Antonio, Casas de Pedro, José Antonio, Muñoz García, Macarena
Tipo de recurso: artículo
Fecha de publicación:2026
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/749760
Acceso en línea:https://hdl.handle.net/10486/749760
https://dx.doi.org/10.1016/j.jhazmat.2026.141068
Access Level:acceso abierto
Palabra clave:CWPO
Cyanotoxins
Degradation pathways
Toxicity
Química
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spelling Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessmentOrtiz Suárez, DavidCires Gómez, SamuelMartínez de Pedro, ZaharaQuesada del Corral, AntonioCasas de Pedro, José AntonioMuñoz García, MacarenaCWPOCyanotoxinsDegradation pathwaysToxicityQuímicaThe widespread occurrence of cyanotoxins in water bodies presents a significant health risk due to their high toxicity and persistence in the environment. Exposure to these toxins can lead to severe health issues, from gastrointestinal distress to organ failure, underscoring the urgent need for advanced water treatment methods. Catalytic Wet Peroxide Oxidation (CWPO) has proven effective for cyanotoxin removal; however, the specific degradation pathways during CWPO remain unclear. This study elucidates the possible degradation pathways of some of the most globally prevalent cyanotoxins, including microcystin-LR (MC-LR) and cylindrospermopsin (CYN), through CWPO using magnetite as a catalyst. These pathways involve hydroxylation, dehydrogenation, decarboxylation, functional group substitution, and ring opening, identifying new degradation by-products. The evolution of ecotoxicity during CWPO was also examined, revealing an initial increase in effluent toxicity under sub-stoichiometric H 2 O 2 conditions, but eventually declines below the toxicity of the original cyanotoxins. Raising the oxidant concentration to stoichiometric levels efficiently eliminates cyanotoxins, yielding primarily short-chain organic acids in a completely non-toxic effluent. These findings are critical for optimizing CWPO as a safe, efficient, and sustainable approach for treating cyanotoxins in water, marking important progress towards cost-effective and environmentally friendly water treatment solutionsThis work has been supported through the project CNS2023–144453 funded by MCIN/AEI/10.13039/501100011033 and by European Union NextGenerationEU/PRTR, and thorough the project PID2022–139063OB-I00 funded by MCIN/AEI/10.13039/ 501100011033 and by ERDF A way of making Europe. D. Ortiz thanks the Spanish Ministry of Universities (MIU) for the FPU predoctoral grant (FPU19/04816)ElsevierDepartamento de Ingeniería QuímicaDepartamento de BiologíaFacultad de CienciasGobierno de España20262026-01-08research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/10486/749760https://dx.doi.org/10.1016/j.jhazmat.2026.141068reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7497602026-06-23T12:46:27Z
dc.title.none.fl_str_mv Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
title Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
spellingShingle Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
Ortiz Suárez, David
CWPO
Cyanotoxins
Degradation pathways
Toxicity
Química
title_short Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
title_full Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
title_fullStr Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
title_full_unstemmed Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
title_sort Catalytic wet peroxide oxidation (CWPO) of widespread cyanotoxins: Degradation pathways and toxicity assessment
dc.creator.none.fl_str_mv Ortiz Suárez, David
Cires Gómez, Samuel
Martínez de Pedro, Zahara
Quesada del Corral, Antonio
Casas de Pedro, José Antonio
Muñoz García, Macarena
author Ortiz Suárez, David
author_facet Ortiz Suárez, David
Cires Gómez, Samuel
Martínez de Pedro, Zahara
Quesada del Corral, Antonio
Casas de Pedro, José Antonio
Muñoz García, Macarena
author_role author
author2 Cires Gómez, Samuel
Martínez de Pedro, Zahara
Quesada del Corral, Antonio
Casas de Pedro, José Antonio
Muñoz García, Macarena
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Ingeniería Química
Departamento de Biología
Facultad de Ciencias
Gobierno de España
dc.subject.none.fl_str_mv CWPO
Cyanotoxins
Degradation pathways
Toxicity
Química
topic CWPO
Cyanotoxins
Degradation pathways
Toxicity
Química
description The widespread occurrence of cyanotoxins in water bodies presents a significant health risk due to their high toxicity and persistence in the environment. Exposure to these toxins can lead to severe health issues, from gastrointestinal distress to organ failure, underscoring the urgent need for advanced water treatment methods. Catalytic Wet Peroxide Oxidation (CWPO) has proven effective for cyanotoxin removal; however, the specific degradation pathways during CWPO remain unclear. This study elucidates the possible degradation pathways of some of the most globally prevalent cyanotoxins, including microcystin-LR (MC-LR) and cylindrospermopsin (CYN), through CWPO using magnetite as a catalyst. These pathways involve hydroxylation, dehydrogenation, decarboxylation, functional group substitution, and ring opening, identifying new degradation by-products. The evolution of ecotoxicity during CWPO was also examined, revealing an initial increase in effluent toxicity under sub-stoichiometric H 2 O 2 conditions, but eventually declines below the toxicity of the original cyanotoxins. Raising the oxidant concentration to stoichiometric levels efficiently eliminates cyanotoxins, yielding primarily short-chain organic acids in a completely non-toxic effluent. These findings are critical for optimizing CWPO as a safe, efficient, and sustainable approach for treating cyanotoxins in water, marking important progress towards cost-effective and environmentally friendly water treatment solutions
publishDate 2026
dc.date.none.fl_str_mv 2026
2026-01-08
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/10486/749760
https://dx.doi.org/10.1016/j.jhazmat.2026.141068
url https://hdl.handle.net/10486/749760
https://dx.doi.org/10.1016/j.jhazmat.2026.141068
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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