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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sulfaquinoxaline Oxidation and Toxicity Reduction by Photo-Fenton Process

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Ribeiro Urbano, Vanessa [1, 2] ; Maniero, Milena Guedes [2] ; Guimaraes, Jose Roberto [2] ; del Valle, Luis J. [1, 3] ; Perez-Moya, Montserrat [1]
Total Authors: 5
[1] Univ Politecn Cataluna, Chem Engn Dept, Escola Engn Barcelona Est EEBE, Av Eduard Maristany 16, Barcelona 08019 - Spain
[2] Univ Estadual Campinas, FEC, UNICAMP, Sch Civil Engn Architecture & Urban Design, POB 6143, BR-13083889 Campinas - Brazil
[3] Univ Politecn Cataluna, Barcelona Res Ctr Multiscale Sci & Engn, Escola Engn Barcelona Est EEBE, Barcelona 08019 - Spain
Total Affiliations: 3
Document type: Journal article
Web of Science Citations: 0

Sulfaquinoxaline (SQX) has been detected in environmental water samples, where its side effects are still unknown. To the best of our knowledge, its oxidation by Fenton and photo-Fenton processes has not been previously reported. In this study, SQX oxidation, mineralization, and toxicity (Escherichia coli and Staphylococcus aureus bacteria) were evaluated at two different setups: laboratory bench (2 L) and pilot plant (15 L). The experimental design was used to assess the influence of the presence or absence of radiation source, as well as different H2O2 concentrations (94.1 to 261.9 mg L-1). The experimental conditions of both setups were: SQX = 25 mg L-1, Fe(II) = 10 mg L-1, pH 2.8 +/- 0.1. Fenton and photo-Fenton were suitable for SQX oxidation and experiments resulted in higher SQX mineralization than reported in the literature. For both setups, the best process was the photo-Fenton (178.0 mg L-1 H2O2), for which over 90% of SQX was removed, over 50% mineralization, and bacterial growth inhibition less than 13%. In both set-ups, the presence or absence of radiation was equally important for sulfaquinoxaline oxidation; however, the degradation rates at the pilot plant were between two to four times higher than the obtained at the laboratory bench. (AU)

FAPESP's process: 13/09543-7 - Residues of veterinary drugs in the environment
Grantee:Susanne Rath
Support type: Research Projects - Thematic Grants
FAPESP's process: 13/04656-8 - Degradation of pharmaceuticals by peroxidation combined with ultraviolet radiation and ozonation: antimicrobial activity and toxicity
Grantee:José Roberto Guimarães
Support type: Regular Research Grants
FAPESP's process: 13/07817-2 - Degradation of sulfonamides and tetraciclines by UV/H2O2 and O3: evaluation of antimicrobial activity and toxicity
Grantee:Milena Guedes Maniero Ferreira
Support type: Scholarships in Brazil - Post-Doctorate