LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL

Autores
Conte, Leandro Oscar; Cotillas, Salvador; Sánchez Yepes, Andrés; Lorenzo, David; Santos, Aurora
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This work focuses on removing hexachlorocyclohexanes (HCHs) found in groundwater polluted with dense non-aqueous phase liquids (DNAPLs) by photo-oxidation with hydrogen peroxide or persulfate using LED visible light and ferrioxalate as the catalyst. Single oxidation tests were also performed to evaluate the contribution of LED-vis light on HCHs removal. Results show that it is possible to attain the degradation of HCHs up to 85% in 420 min with persulfate, whereas percentages lower than 40% are obtained when using hydrogen peroxide. Using both oxidants in the presence of ferrioxalate and LED visible light promotes the generation of hydroxyl and sulfate radicals under circumneutral pH values, which are the main responsible species for HCHs removal. Specifically, an oxidant conversion higher than 50% was achieved during the photochemical treatment with both oxidants, whereas conversions below 20% were obtained in the absence of LED visible light irradiation. On the other hand, DNAPL produced as liquid residuum of lindane production contains other chlorinated organic compounds (COCs), which are susceptible to being oxidized by hydroxyl and sulfate radicals, generating competitive oxidation reactions. The final conversion of chlorbenzenes reaches values close to 100% and HCHs are only effectively removed when persulfate is used as the oxidant. This better performance indicates that the photo-oxidation of DNAPL polluted groundwater with LED-vis light should be carried out with persulfate to ensure the removal of more dangerous COCs. This confirms the excellent ability of sulfate radicals for C-Cl bond breakdown.
Fil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Cotillas, Salvador. Universidad Complutense de Madrid; España
Fil: Sánchez Yepes, Andrés. Universidad Complutense de Madrid; España
Fil: Lorenzo, David. Universidad Complutense de Madrid; España
Fil: Santos, Aurora. Universidad Complutense de Madrid; España
Materia
DNAPL
FERRIOXALATE
LED VIS-LIGHT
LINDANE
PERSULFATE
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/218564
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPLConte, Leandro OscarCotillas, SalvadorSánchez Yepes, AndrésLorenzo, DavidSantos, AuroraDNAPLFERRIOXALATELED VIS-LIGHTLINDANEPERSULFATEhttps://purl.org/becyt/ford/2.7https://purl.org/becyt/ford/2This work focuses on removing hexachlorocyclohexanes (HCHs) found in groundwater polluted with dense non-aqueous phase liquids (DNAPLs) by photo-oxidation with hydrogen peroxide or persulfate using LED visible light and ferrioxalate as the catalyst. Single oxidation tests were also performed to evaluate the contribution of LED-vis light on HCHs removal. Results show that it is possible to attain the degradation of HCHs up to 85% in 420 min with persulfate, whereas percentages lower than 40% are obtained when using hydrogen peroxide. Using both oxidants in the presence of ferrioxalate and LED visible light promotes the generation of hydroxyl and sulfate radicals under circumneutral pH values, which are the main responsible species for HCHs removal. Specifically, an oxidant conversion higher than 50% was achieved during the photochemical treatment with both oxidants, whereas conversions below 20% were obtained in the absence of LED visible light irradiation. On the other hand, DNAPL produced as liquid residuum of lindane production contains other chlorinated organic compounds (COCs), which are susceptible to being oxidized by hydroxyl and sulfate radicals, generating competitive oxidation reactions. The final conversion of chlorbenzenes reaches values close to 100% and HCHs are only effectively removed when persulfate is used as the oxidant. This better performance indicates that the photo-oxidation of DNAPL polluted groundwater with LED-vis light should be carried out with persulfate to ensure the removal of more dangerous COCs. This confirms the excellent ability of sulfate radicals for C-Cl bond breakdown.Fil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Cotillas, Salvador. Universidad Complutense de Madrid; EspañaFil: Sánchez Yepes, Andrés. Universidad Complutense de Madrid; EspañaFil: Lorenzo, David. Universidad Complutense de Madrid; EspañaFil: Santos, Aurora. Universidad Complutense de Madrid; EspañaElsevier2022-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/218564Conte, Leandro Oscar; Cotillas, Salvador; Sánchez Yepes, Andrés; Lorenzo, David; Santos, Aurora; LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL; Elsevier; Process Safety and Environmental Protection; 168; 12-2022; 434-4420957-5820CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.psep.2022.10.015info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0957582022008801info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:47:25Zoai:ri.conicet.gov.ar:11336/218564instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:47:25.984CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
title LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
spellingShingle LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
Conte, Leandro Oscar
DNAPL
FERRIOXALATE
LED VIS-LIGHT
LINDANE
PERSULFATE
title_short LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
title_full LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
title_fullStr LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
title_full_unstemmed LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
title_sort LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL
dc.creator.none.fl_str_mv Conte, Leandro Oscar
Cotillas, Salvador
Sánchez Yepes, Andrés
Lorenzo, David
Santos, Aurora
author Conte, Leandro Oscar
author_facet Conte, Leandro Oscar
Cotillas, Salvador
Sánchez Yepes, Andrés
Lorenzo, David
Santos, Aurora
author_role author
author2 Cotillas, Salvador
Sánchez Yepes, Andrés
Lorenzo, David
Santos, Aurora
author2_role author
author
author
author
dc.subject.none.fl_str_mv DNAPL
FERRIOXALATE
LED VIS-LIGHT
LINDANE
PERSULFATE
topic DNAPL
FERRIOXALATE
LED VIS-LIGHT
LINDANE
PERSULFATE
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.7
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv This work focuses on removing hexachlorocyclohexanes (HCHs) found in groundwater polluted with dense non-aqueous phase liquids (DNAPLs) by photo-oxidation with hydrogen peroxide or persulfate using LED visible light and ferrioxalate as the catalyst. Single oxidation tests were also performed to evaluate the contribution of LED-vis light on HCHs removal. Results show that it is possible to attain the degradation of HCHs up to 85% in 420 min with persulfate, whereas percentages lower than 40% are obtained when using hydrogen peroxide. Using both oxidants in the presence of ferrioxalate and LED visible light promotes the generation of hydroxyl and sulfate radicals under circumneutral pH values, which are the main responsible species for HCHs removal. Specifically, an oxidant conversion higher than 50% was achieved during the photochemical treatment with both oxidants, whereas conversions below 20% were obtained in the absence of LED visible light irradiation. On the other hand, DNAPL produced as liquid residuum of lindane production contains other chlorinated organic compounds (COCs), which are susceptible to being oxidized by hydroxyl and sulfate radicals, generating competitive oxidation reactions. The final conversion of chlorbenzenes reaches values close to 100% and HCHs are only effectively removed when persulfate is used as the oxidant. This better performance indicates that the photo-oxidation of DNAPL polluted groundwater with LED-vis light should be carried out with persulfate to ensure the removal of more dangerous COCs. This confirms the excellent ability of sulfate radicals for C-Cl bond breakdown.
Fil: Conte, Leandro Oscar. Universidad Complutense de Madrid; España. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Cotillas, Salvador. Universidad Complutense de Madrid; España
Fil: Sánchez Yepes, Andrés. Universidad Complutense de Madrid; España
Fil: Lorenzo, David. Universidad Complutense de Madrid; España
Fil: Santos, Aurora. Universidad Complutense de Madrid; España
description This work focuses on removing hexachlorocyclohexanes (HCHs) found in groundwater polluted with dense non-aqueous phase liquids (DNAPLs) by photo-oxidation with hydrogen peroxide or persulfate using LED visible light and ferrioxalate as the catalyst. Single oxidation tests were also performed to evaluate the contribution of LED-vis light on HCHs removal. Results show that it is possible to attain the degradation of HCHs up to 85% in 420 min with persulfate, whereas percentages lower than 40% are obtained when using hydrogen peroxide. Using both oxidants in the presence of ferrioxalate and LED visible light promotes the generation of hydroxyl and sulfate radicals under circumneutral pH values, which are the main responsible species for HCHs removal. Specifically, an oxidant conversion higher than 50% was achieved during the photochemical treatment with both oxidants, whereas conversions below 20% were obtained in the absence of LED visible light irradiation. On the other hand, DNAPL produced as liquid residuum of lindane production contains other chlorinated organic compounds (COCs), which are susceptible to being oxidized by hydroxyl and sulfate radicals, generating competitive oxidation reactions. The final conversion of chlorbenzenes reaches values close to 100% and HCHs are only effectively removed when persulfate is used as the oxidant. This better performance indicates that the photo-oxidation of DNAPL polluted groundwater with LED-vis light should be carried out with persulfate to ensure the removal of more dangerous COCs. This confirms the excellent ability of sulfate radicals for C-Cl bond breakdown.
publishDate 2022
dc.date.none.fl_str_mv 2022-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/218564
Conte, Leandro Oscar; Cotillas, Salvador; Sánchez Yepes, Andrés; Lorenzo, David; Santos, Aurora; LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL; Elsevier; Process Safety and Environmental Protection; 168; 12-2022; 434-442
0957-5820
CONICET Digital
CONICET
url http://hdl.handle.net/11336/218564
identifier_str_mv Conte, Leandro Oscar; Cotillas, Salvador; Sánchez Yepes, Andrés; Lorenzo, David; Santos, Aurora; LED visible light assisted photochemical oxidation of HCHs in aqueous phases polluted with DNAPL; Elsevier; Process Safety and Environmental Protection; 168; 12-2022; 434-442
0957-5820
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.psep.2022.10.015
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0957582022008801
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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