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Photodecomposition of antibiotics and their transformation products in wastewaters using ZnO and TiO2 with LED lamps

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dc.contributor.authorMartínez Escudero, Carmen Maria
dc.contributor.authorGarrido, Isabel
dc.contributor.authorContreras, Fulgencio
dc.contributor.authorHellín, Pilar
dc.contributor.authorFlores, Pilar
dc.contributor.authorArroyo Manzanares, Natalia
dc.contributor.authorCampillo Seva, Natalia
dc.contributor.authorPastor Belda, Marta
dc.contributor.authorViñas López-Pelegrin, Pilar
dc.contributor.authorFenoll, José
dc.contributor.authorLeón Morán, Lixy Olinda
dc.contributor.departmentQuímica Analítica
dc.date.accessioned2026-02-25T13:15:56Z
dc.date.available2026-02-25T13:15:56Z
dc.date.copyright© 2024 Elsevier B.V.
dc.date.issued2024-09-01
dc.description.abstractThis work presents a study of the behavior of three antibiotics (erythromycin (ERY), clarithromycin (CLR) and sulfadiazine (SFZ)) and their transformation products (TPs), generated after photolytic and photocatalytic (TiO2 and ZnO) treatments, in wastewater irradiated with ultraviolet (UV) light emitting diode (LED) lamps as light source. For this, an analytical methodology for the antibiotics and their TPs was developed. Thus, samples were treated by salting-out assisted liquid–liquid extraction (SALLE) and identification and quantification was carried out by liquid chromatography with mass spectrometry (LC-MS) using quadrupole time-of-flight (QTOF) and triple quadrupole (QqQ) analyzers, respectively. The results revealed the presence of 14, 13 and 5 TPs of ERY, CLR and SFZ, respectively, being found in wastewaters spiked with the antibiotics during photo-oxidation treatment. Subsequently, the established analytical method was also applied, in a real case, to study of behavior of these pharmaceuticals (0.2 mg L-1) and their TPs generated in wastewater during a photocatalytic treatment. In this case, 13, 11 and 2 TPs were tentatively identified ERY, CLR and SFZ, respectively. In addition, the photocatalytic treatment using TiO2 exhibited higher degradation rate than photocatalytic treatment using ZnO. The ECOSAR programme was used to estimate the potential ecotoxicity of the identified TPs. The results showed a potential hazard of SFZ, CLR, ERY and some of their TPs to aquatic organisms. Furthermore, some of the identified TPs were found to be more toxic than their parent compounds.
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dc.format.extent18
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry, 454, 2024, 115732
dc.identifier.doihttps://doi.org/10.1016/j.jphotochem.2024.115732
dc.identifier.eissn1873-2666
dc.identifier.issn1010-6030
dc.identifier.urihttp://hdl.handle.net/10201/213401
dc.languageeng
dc.publisherElsevier
dc.relationMinisterio de Ciencia e Innovación (TED2021-129766B-C21 y TED2021-129766B-C22 AEI/10.13039/501100011033/ Unión Europea NextGenerationEU/PRTR)
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1010603024002764?via%3Dihub
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectWater
dc.subjectErythromycin
dc.subjectClarithromycin
dc.subjectSulfadiazine
dc.subjectHeterogeneous photocatalysis
dc.subject.odsNo relacionado con ningún objetivo de desarrollo sostenible
dc.titlePhotodecomposition of antibiotics and their transformation products in wastewaters using ZnO and TiO2 with LED lamps
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublicationes
oaire.citation.volume454
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relation.isAuthorOfPublication.latestForDiscoveryb248fbac-12a2-425f-a31e-bf96a78661c6
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