Sulfaquinoxaline Oxidation and Toxicity Reduction by Photo-Fenton Process
| Autor: | Montserrat Pérez-Moya, Vanessa Ribeiro Urbano, Milena Guedes Maniero, José Roberto Guimarães, Luis J. del Valle |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
inorganic chemicals
advanced oxidation process experimental design Health Toxicology and Mutagenesis lcsh:Medicine 02 engineering and technology 010501 environmental sciences Bacterial growth 01 natural sciences Article chemistry.chemical_compound Sulfaquinoxaline photo-Fenton mineralization 0105 earth and related environmental sciences emerging contaminants Advanced oxidation process lcsh:R Public Health Environmental and Occupational Health oxidations toxicity Mineralization (soil science) Hydrogen Peroxide Toxicity reduction Hydrogen-Ion Concentration 021001 nanoscience & nanotechnology Pilot plant chemistry sulfaquinoxaline Toxicity Degradation (geology) 0210 nano-technology Oxidation-Reduction Water Pollutants Chemical Nuclear chemistry |
| Zdroj: | International Journal of Environmental Research and Public Health, Vol 18, Iss 1005, p 1005 (2021) International Journal of Environmental Research and Public Health Volume 18 Issue 3 |
| ISSN: | 1661-7827 1660-4601 |
| Popis: | 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&minus 1). The experimental conditions of both setups were: SQX = 25 mg L&minus 1, Fe(II) = 10 mg L&minus 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&minus 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. |
| Databáze: | OpenAIRE |
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