Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products

Combined sewer overflows (CSO), generated during the wet weather flow from the combination of the inflow and stormwater runoff in sewer system, result in an overflow of untreated wastewater from sewer system, which might ultimately contain different micropollutants (MPs). In this study, a coagulatio...

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Autores: Porcar Santos, Oriol, Cruz Alcalde, Alberto, López Vinent, Núria, Zanganas, Dimitrios, Sans Mazón, Carme
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/184662
Acceso en línea:https://hdl.handle.net/2445/184662
Access Level:acceso abierto
Palabra clave:Fotocatàlisi
Halògens
Diòxid de titani
Nanopartícules
Photocatalysis
Halogens
Titanium dioxide
Nanoparticles
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spelling Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-productsPorcar Santos, OriolCruz Alcalde, AlbertoLópez Vinent, NúriaZanganas, DimitriosSans Mazón, CarmeFotocatàlisiHalògensDiòxid de titaniNanopartículesPhotocatalysisHalogensTitanium dioxideNanoparticlesCombined sewer overflows (CSO), generated during the wet weather flow from the combination of the inflow and stormwater runoff in sewer system, result in an overflow of untreated wastewater from sewer system, which might ultimately contain different micropollutants (MPs). In this study, a coagulation-flocculation-sedimentation (CFS) pretreated CSO spiked with MPs was treated by catalytic ozonation using carbon, iron and peroxide based catalysts. The catalysts were characterized and their activity on MPs removal was studied at two different ozone (O3) doses (5 and 10 mg L‒1). The effect of the treatment on the spiked CSO effluent was also assessed from the acute toxicity of the effluent using Microtox®, Yeast and Macrophage cell-line toxicity assay tests. All the carbon-based catalysts showed large surface area, which was strongly influenced by the activation technique in the preparation of the catalyst. The CFS treatment strongly reduced the turbidity (≥ 60%) but had marginal effect on the UV254, dissolved organic carbon (DOC) and pH. Sludge Based Carbon (SBC) showed strong adsorption capacity (≥ 60% removal efficiency) for all MPs studied compared to other carbon and iron-based catalysts. Ozonation alone was effective for the degradation of easily oxidizable MPs (sulfamethoxazole, mecoprop, and 2,4-dichlorophenoxyl acetic acid), achieving more than 80% degradation efficiency at 10 mg L‒1 of ozone, but not effective for atrazine (≤ 60% degradation efficiency) at similar O3 dose. Catalytic ozonation (at 10 mg L‒1 O3 dose) improved the degradation of the MPs at low catalyst dosage but higher dosage strongly inhibited their degradation. In all cases, the effluents showed negligible acute toxicity, indicating the suitability of the process for the treatment of CSO.Elsevier B.V.2022202220202022info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersion34 p.application/pdfhttps://hdl.handle.net/2445/184662Articles publicats en revistes (Enginyeria Química i Química Analítica)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésVersió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2020.139605Chemical Engineering Journal, 2020, vol. 736, num. 139605https://doi.org/10.1016/j.scitotenv.2020.139605cc-by-nc-nd (c) Elsevier B.V., 2020https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1846622026-05-29T05:05:01Z
dc.title.none.fl_str_mv Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
title Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
spellingShingle Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
Porcar Santos, Oriol
Fotocatàlisi
Halògens
Diòxid de titani
Nanopartícules
Photocatalysis
Halogens
Titanium dioxide
Nanoparticles
title_short Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
title_full Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
title_fullStr Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
title_full_unstemmed Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
title_sort Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
dc.creator.none.fl_str_mv Porcar Santos, Oriol
Cruz Alcalde, Alberto
López Vinent, Núria
Zanganas, Dimitrios
Sans Mazón, Carme
author Porcar Santos, Oriol
author_facet Porcar Santos, Oriol
Cruz Alcalde, Alberto
López Vinent, Núria
Zanganas, Dimitrios
Sans Mazón, Carme
author_role author
author2 Cruz Alcalde, Alberto
López Vinent, Núria
Zanganas, Dimitrios
Sans Mazón, Carme
author2_role author
author
author
author
dc.subject.none.fl_str_mv Fotocatàlisi
Halògens
Diòxid de titani
Nanopartícules
Photocatalysis
Halogens
Titanium dioxide
Nanoparticles
topic Fotocatàlisi
Halògens
Diòxid de titani
Nanopartícules
Photocatalysis
Halogens
Titanium dioxide
Nanoparticles
description Combined sewer overflows (CSO), generated during the wet weather flow from the combination of the inflow and stormwater runoff in sewer system, result in an overflow of untreated wastewater from sewer system, which might ultimately contain different micropollutants (MPs). In this study, a coagulation-flocculation-sedimentation (CFS) pretreated CSO spiked with MPs was treated by catalytic ozonation using carbon, iron and peroxide based catalysts. The catalysts were characterized and their activity on MPs removal was studied at two different ozone (O3) doses (5 and 10 mg L‒1). The effect of the treatment on the spiked CSO effluent was also assessed from the acute toxicity of the effluent using Microtox®, Yeast and Macrophage cell-line toxicity assay tests. All the carbon-based catalysts showed large surface area, which was strongly influenced by the activation technique in the preparation of the catalyst. The CFS treatment strongly reduced the turbidity (≥ 60%) but had marginal effect on the UV254, dissolved organic carbon (DOC) and pH. Sludge Based Carbon (SBC) showed strong adsorption capacity (≥ 60% removal efficiency) for all MPs studied compared to other carbon and iron-based catalysts. Ozonation alone was effective for the degradation of easily oxidizable MPs (sulfamethoxazole, mecoprop, and 2,4-dichlorophenoxyl acetic acid), achieving more than 80% degradation efficiency at 10 mg L‒1 of ozone, but not effective for atrazine (≤ 60% degradation efficiency) at similar O3 dose. Catalytic ozonation (at 10 mg L‒1 O3 dose) improved the degradation of the MPs at low catalyst dosage but higher dosage strongly inhibited their degradation. In all cases, the effluents showed negligible acute toxicity, indicating the suitability of the process for the treatment of CSO.
publishDate 2020
dc.date.none.fl_str_mv 2020
2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/184662
url https://hdl.handle.net/2445/184662
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1016/j.scitotenv.2020.139605
Chemical Engineering Journal, 2020, vol. 736, num. 139605
https://doi.org/10.1016/j.scitotenv.2020.139605
dc.rights.none.fl_str_mv cc-by-nc-nd (c) Elsevier B.V., 2020
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by-nc-nd (c) Elsevier B.V., 2020
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 34 p.
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Articles publicats en revistes (Enginyeria Química i Química Analítica)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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