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Advanced oxidation of PET-derived monomers using excimer radiation and hydrogen peroxide: kinetic and operational insights

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dc.contributor.authorGómez Gómez, María
dc.contributor.authorMontiel Morte, María Claudia
dc.contributor.authorGómez Gómez, Elisa
dc.contributor.authorHidalgo Montesinos, Asunción María
dc.contributor.authorMáximo, María Fuensanta
dc.contributor.authorMurcia Almagro, María Dolores
dc.contributor.departmentIngeniería Química
dc.contributor.otherFacultades de la UMU::Facultad de Química
dc.date.accessioned2026-01-30T09:37:31Z
dc.date.available2026-01-30T09:37:31Z
dc.date.copyright© 2026 by the authors
dc.date.issued2026-01-29
dc.description.abstractGrowing environmental concern over plastic pollution has increased the need to address the persistence of PET-derived monomers, such as bis(2-hydroxyethyl) terephthalate (BHET) and terephthalic acid (TPA). This work examines the use of excimer radiation lamps combined with hydrogen peroxide (H2O2) to enhance advanced oxidation processes (AOPs) for their degradation. This approach stands out for its high selectivity, absence of mercury, and lower production of toxic byproducts. Experimental tests assessed how different operational factors affect pollutant degradation, such as the initial pollutant concentration (50–200 mg/L), the reaction volume (125–500 mL), and the H2O2:monomer mass ratio (0:1–6:1 for BHET and 0:1–4:1 for TPA). For BHET, the best results occurred with a 5:1 mass ratio, while TPA degraded optimally with a 3:1 ratio, with a 250 mL reaction volume and a 100 mg/L initial concentration for both compounds. Under these conditions, total degradation of the initial monomers was achieved in around 30 and 80 min for BHET and TPA, respectively, and at the end of the reaction, COD decreased by 46% and 32% relative to their initial values. In both cases, hydrogen peroxide was crucial since UV radiation alone led to much lower degradation efficiency. These results emphasize the need to optimize operational conditions for greater efficiency and establish a starting point for future use of excimer technology in the treatment of wastewater contaminated with PET and its derivatives. Additionally, the degradation data closely matched a pseudo-first-order kinetic model (R2 ≈ 1), confirming its reliability for predictive analysis, which is of high importance for the simulation and optimization of the process.
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dc.identifier.citationGómez, M.; Montiel, M.C.; Gómez, E.; Hidalgo, A.M.; Máximo, F.; Murcia, M.D. Advanced Oxidation of PET-Derived Monomers Using Excimer Radiation and Hydrogen Peroxide: Kinetic and Operational Insights. ChemEngineering 2026, 10, 19. https://doi.org/10.3390/chemengineering10020019
dc.identifier.doihttps://doi.org/10.3390/chemengineering10020019
dc.identifier.eissn2305-7084
dc.identifier.urihttp://hdl.handle.net/10201/197709
dc.languageeng
dc.publisherMDPI
dc.relationThis study forms part of the ThinkInAzul programme and was supported by MCIU with funding from European Union NextGenerationEU (PRTR-C17.I1) and by Comunidad Autónoma de la Región de Murcia—Fundación Séneca.
dc.relation.publisherversionhttps://www.mdpi.com/2305-7084/10/2/19
dc.rightsAttribution 4.0 International*
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectBis(2-hydroxyethyl) terephthalate
dc.subjectTerephthalic acid; excilamps
dc.subjectFow through photoreactor
dc.subjectKinetic model
dc.subject.odsObjetivo 6: Agua y saneamiento
dc.titleAdvanced oxidation of PET-derived monomers using excimer radiation and hydrogen peroxide: kinetic and operational insights
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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