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902643.pdf (605.66 KB)

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Document embargat fins el 2027-10-14

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2025-10-15

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cc-by-nc-nd (c) Elsevier B.V., 2025
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/224205

H2O2 electrosynthesis in a reactor without forced aeration for the complete degradation of antibiotics by photoelectro-Fenton-like process at neutral pH

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https://doi.org/10.1016/j.cej.2025.169695

Resum

Innovative systems for H2O2-based advanced wastewater treatment avoiding the need of external aeration are pursued with great interest, since they allow decreasing the capital expenses significantly. This work shows the good performance of a rotating cylinder electrode (RCE) reactor for continuous H2O2 electrosynthesis sustained by anodic oxygen, and its use in the degradation of the antibiotic enrofloxacin (ENR) by photoelectro-Fenton (PEF) process at pH 7 using Fe(III)-ethylenediamine-N,N´-disuccinic (EDDS) acid complex as catalyst. For H2O2 accumulation in different aqueous matrices, each peripheral velocity (U) was linked to a specific limiting current (IL) using a mass transport correlation. H2O2 concentrations in the range of 2.4–3.7 mM were attained after 60 min of electrolysis at U = 198.9 cm s−1 (1000 rpm, IL = 0.31 A). At that rotation rate, the elimination of 5 mg L−1 ENR was 100 % after 30 min in a 50 mM Na2SO4 + 0.1 mM Fe(III)-EDDS. Moreover, ENR removal over 95 % was reached at 60 min in actual urban wastewater. The main by-products were oxalic and oxamic acid, accompanied by nitrate, ammonium, and fluoride ions. The superiority of PEF process as decontamination process was verified from the lower toxicity of the treated ENR solutions.

Matèries

Antibiòtics, Depuració de l'aigua, Oxidació electroquímica

Matèries (anglès)

Antibiotics, Water purification, Electrolytic oxidation

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Articles publicats en revistes (Ciència dels Materials i Química Física)

Citació

CORNEJO, Oscar m., ORNELAS DÁVILA, O., DÁVILA-JIMÉNEZ, Martín m., SIRÉS SADORNIL, Ignacio. H2O2 electrosynthesis in a reactor without forced aeration for the complete degradation of antibiotics by photoelectro-Fenton-like process at neutral pH. _Chemical Engineering Journal_. 2025. Vol. 524, núm. 1-12. [consulta: 2 de gener de 2026]. ISSN: 1385-8947. [Disponible a: https://hdl.handle.net/2445/224205]

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