Sulfaquinoxaline Oxidation and Toxicity Reduction by Photo-Fenton Process

Autor(es)

Ribeiro Urbano, Vanessa ^{[1, 2]} ; Maniero, Milena Guedes ^[2] ; Guimaraes, Jose Roberto ^[2] ; del Valle, Luis J. ^{[1, 3]} ; Perez-Moya, Montserrat ^[1]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH; v. 18, n. 3 FEB 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 13/09543-7 - Resíduos de medicamentos veterinários no ambiente
• Beneficiário: Susanne Rath
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/04656-8 - Degradação de fármacos por peroxidação assistida por radiação ultravioleta e ozonização: atividade antimicrobiana e toxicidade
• Beneficiário: José Roberto Guimarães
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/07817-2 - Degradação de sulfonamidas e tetraciclinas por UV/H2O2 e O3: avaliação da atividade antimicrobiana e da toxicidade
• Beneficiário: Milena Guedes Maniero Ferreira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado