Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

728280.pdf (1.07 MB)

Document type

Article

Version

Published version

Publication date

2022-12-14

Publication license

cc-by-nc-nd (c) Murrieta, Maria F. et al., 2022
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/196358

Solar photoelectro-Fenton-like process with anodically-generated HClO in a flow reactor: Norfloxacin as a pollutant with a particular structure

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

https://doi.org/10.1016/j.seppur.2022.122893

Abstract

The degradation and mineralization of the drug norfloxacin (NFX) has been assessed in a model solution, containing 15 mM NaCl +45 mM Na2SO4 at pH 3.0, using a flow plant with an FM01-LC filter-press reactor equipped with a Ti|Ir-Sn-Ru oxides anode to electrogenerate HClO from Cl- oxidation and a stainless-steel cathode. Unexpectedly, anodic oxidation with active chlorine (AO-HClO) outperformed electro-Fenton (EF-HClO), photoelectro-Fenton (PEF-HClO) and solar photoelectro-Fenton (SPEF-HClO) due to: (i) the formation of refractory complexes between iron ions and carboxyl group of NFX, and (ii) the conversion of HClO into less effective ¿OH upon its Fenton-like reaction with added Fe2+ catalyst. SPEF-HClO was superior among Fentonbased treatments because the ¿OH concentration was largely increased by the photolysis of Fe(III) species. At an initial NFX concentration in the range 0.103-0.146 mM, the optimum conditions for SPEF-HClO were 0.40 mM Fe2+ and 15 mA cm􀀀 2. A BDD anode allowed a higher production of ¿OH, accelerating the degradation and mineralization, with similar energy requirements as compared to trials with Ti|Ir-Sn-Ru oxides anode. The SPEFHClO process in urban wastewater was less powerful because of the parallel oxidation of natural organic matter. HClO, Fe2+ and Fetotal were quantified in both water matrices. The initial degradation sequence for NFX, proposed from 10 primary by-products identified by LC-MS/MS, revealed the occurrence of hydroxylation, chlorination and defluorination steps. Additionally, 5 stable by-products were detected by GC-MS.

Subject

Oxidació electroquímica, Reutilització de l'aigua, Fotoelectrons

Subject (English)

Electrolytic oxidation, Water reuse, Photoelectrons

Citation

Collections

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

Citation

MURRIETA, Maria F., et al. Solar photoelectro-Fenton-like process with anodically-generated HClO in a flow reactor: Norfloxacin as a pollutant with a particular structure. Separation and Purification Technology. 2022. Vol. 308, num. 122893. ISSN 1383-5866. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/196358

Export metadata

JSON - METS

Share record