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Article

Sulfamethoxazole and Trimethoprim Degradation by Fenton and Fenton-Like Processes

1
Faculty of Engineering, Federal University of Catalão (UFCAT), Catalão-GO 75.704-020, Brazil
2
Department of Agricultural Engineering, Federal University of Viçosa (UFV), Viçosa-MG 36.570-900, Brazil
3
Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais (UFMG), Belo Horizonte-MG 31.270-901, Brazil
4
Institute of Chemistry, Federal University of Catalão (UFCAT), Catalão-GO 75.704-020, Brazil
*
Author to whom correspondence should be addressed.
Received: 13 May 2020 / Revised: 1 June 2020 / Accepted: 6 June 2020 / Published: 9 June 2020
(This article belongs to the Special Issue Wastewater Engineering and Environmental Catalysis)
In this work, the degradation of sulfamethoxazole (SMX) and trimethoprim (TMP) via Fenton and Fenton-like processes was evaluated using Mn2+ as supporting catalyst in the Fenton reaction. The optimum conditions of degradation were also evaluated. Besides that, the effect of independent factors pH, [H2O2], [Fe2+], [Mn2+] and reaction time (t) on the efficiency of the SMX and TMP degradation were assessed. Box–Behnken was the experimental design adopted, delineating the relative concentration (C/Co) of antibiotics after treatments as response variable. The inferences were conducted using variance analysis, Pareto chart, response surface methodology, and desirability function. Due to the lack of adjustment of the SMX degradation model, there are no more inferences about it. The significant variables (p ≤ 0.05) on TMP degradation were: reaction time quadratic and linear effect, [Fe2+] linear effect, [Mn2+] linear effect, interaction pH vs. [Mn2+]. The Mn2+ addition aided TMP degradation in environments with lower pH values. However, the addition may harm the efficiency of the antibiotic degradation at higher pH. The optimum condition for TMP degradation in the conventional process (without the addition of Mn2+) is: pH 5, [H2O2] equal to 4.41 mmol L−1, [Fe2+] equal to 0.81 mmol L−1 and 90 min reaction time. View Full-Text
Keywords: sulfamethoxazole; trimethoprim; advanced oxidation process; Fenton reaction sulfamethoxazole; trimethoprim; advanced oxidation process; Fenton reaction
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MDPI and ACS Style

Sarmento, A.P.; Borges, A.C.; Matos, A.T.d.; Romualdo, L.L. Sulfamethoxazole and Trimethoprim Degradation by Fenton and Fenton-Like Processes. Water 2020, 12, 1655. https://0-doi-org.brum.beds.ac.uk/10.3390/w12061655

AMA Style

Sarmento AP, Borges AC, Matos ATd, Romualdo LL. Sulfamethoxazole and Trimethoprim Degradation by Fenton and Fenton-Like Processes. Water. 2020; 12(6):1655. https://0-doi-org.brum.beds.ac.uk/10.3390/w12061655

Chicago/Turabian Style

Sarmento, Antover P., Alisson C. Borges, Antonio T.d. Matos, and Lincoln L. Romualdo 2020. "Sulfamethoxazole and Trimethoprim Degradation by Fenton and Fenton-Like Processes" Water 12, no. 6: 1655. https://0-doi-org.brum.beds.ac.uk/10.3390/w12061655

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