Wüstite as a catalyst source for water remediation: Differentiated antimicrobial activity of by-products, action routes of the process, and transformation of fluoroquinolones

Jojoa-Sierra, S. (Universidad de Zaragoza) ; Herrero-Albillos, J. (Universidad de Zaragoza) ; Ormad, M. P. (Universidad de Zaragoza) ; Serna-Galvis, E. ; Torres-Palma, R. ; Mosteo, R. (Universidad de Zaragoza)

Resumen: Wüstite under simulated solar irradiation with addition of H2O2 was used to treat enrofloxacin and levofloxacin in water. Wüstite was characterized, showing 2.1 eV of bandgap and species of Fe3+ on the surface that favor its catalytic ability. The effect of light intensity, wüstite dose, concentration of H2O2, and pH on the removal of antimicrobial activity (AA, against S. aureus and E. coli), was tested, finding as suitable conditions: intensity]: 500 W m-2, wüstite]: 10 mg L-1, H2O2]: 1.0 mmol L-1, and pH 6.5. Under such conditions, up to 100% of AA elimination occurred at 180 min of treatment. The Light-Wüstite-H2O2 system involved, the action of light, O2•-, 1O2, and HO•, where wüstite acted as a semiconductor and a catalyst for heterogeneous photo-Fenton. Furthermore, this system mineralized 21% of ENR, and the wüstite catalyst promoted 100% of AA removal up to the fourth reuse cycle. Interestingly, the application of Light-Wüstite-H2O2 to an actual effluent led to complete AA removal after 180 min treatment. The process action on ENR generated six stable products, exhibiting the loss of the fluorine atom (induced by light directly) and modifications on the ethyl-piperazyl group (reactive region according to calculations of atomic charge) by radical attacks. The relationship between the AA and structural transformations showed that those products that retained quinolone and piperazyl moieties had AA. © 2022 Elsevier B.V.

Idioma: Inglés

DOI: 10.1016/j.cej.2022.134850

Año: 2022

Publicado en: Chemical Engineering Journal 435, 1 (2022), 134850 [15 pp.]
ISSN: 1385-8947

Factor impacto JCR: 15.1 (2022)

Categ. JCR: ENGINEERING, ENVIRONMENTAL rank: 3 / 55 = 0.055 (2022) - Q1 - T1
Categ. JCR: ENGINEERING, CHEMICAL rank: 5 / 141 = 0.035 (2022) - Q1 - T1

Factor impacto CITESCORE: 21.5 - Engineering (Q1) - Chemistry (Q1) - Chemical Engineering (Q1) - Environmental Science (Q1)

Factor impacto SCIMAGO: 2.803 - Chemical Engineering (miscellaneous) (Q1) - Industrial and Manufacturing Engineering (Q1) - Environmental Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/B43-20R
Financiación: info:eu-repo/grantAgreement/ES/MCINN/MAT2017-83468-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)