Electro-oxidation of amoxicillin using titanium electrodes electrophoretically coated by iridium or ruthenium with tantalum oxides

Le�n, Itzel; Gomes, Helena; Sep�lveda?Guzm�n, Selene; C�rdenas, Jesus; Rivera, Fernando; Manr�quez, Juan; Bustos, Erika

Abstract

© 2020 Society of Chemical Industry (SCI) BACKGROUND: Amoxicillin (AMX) is one of the pharmaceutical compounds in waters being targeted in wastewater decontamination studies, and some of the technological alternatives to degrade it involve using modified surfaces with transition metal oxides, such as IrO2/Ta2O5|Ti and RuO2/Ta2O5|Ti, for in situ production of hydroxyl radical (•OH) to oxidize AMX in aqueous media. RESULTS: The IrO2/Ta2O5|Ti 70:30 electrode was best suited for AMX electro-oxidation, with 99.23% removal measured by HPLC-UV–Vis, 81.13% by COD removal, and current efficiency of 41.1% in 0.1 mol L–1 Na2SO4 after applying 15 mA for 6 h. These results are due to a larger surface area (251.67 cm2) and a higher amount of •OH radicals being generated by cm2 in neutral pH (3.8 mol L–1 cm−2) compared to the other electrodes. CONCLUSION: This paper shows the simulation of the experimental data regarding the complete degradation of AMX (100%) by HPLC, comparing the experimental results and simulation results for AMX degradation using the IrO2/Ta2O5|Ti 70:30. The modeling predicts and validates the disengagement of COD obtained experimentally, considering the mechanism proposed by Trovó and collaborators for the electro-oxidation of AMX to product C6 (C16H22N3O7S) by generating •OH. © 2020 Society of Chemical Industry (SCI).

Citation

León, I., Gomes, H., Sepúlveda‐Guzmán, S., Cárdenas, J., Rivera, F., Manríquez, J., & Bustos, E. (2021). Electro-oxidation of amoxicillin using titanium electrodes electrophoretically coated by iridium or ruthenium with tantalum oxides. Journal of Chemical Technology and Biotechnology, 96(3), 622-629. https://doi.org/10.1002/jctb.6575

• Journal Article Type: Article
• Acceptance Date: Sep 21, 2020
• Online Publication Date: Sep 21, 2020
• Publication Date: 2021-03
• Deposit Date: Sep 25, 2020
• Publicly Available Date: Sep 22, 2021
• Journal: Journal of Chemical Technology and Biotechnology
• Print ISSN: 0268-2575
• Electronic ISSN: 1097-4660
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 96
• Issue: 3
• Pages: 622-629
• DOI: https://doi.org/10.1002/jctb.6575
• Keywords: Biotechnology; Fuel Technology; Inorganic Chemistry; Renewable Energy, Sustainability and the Environment; Organic Chemistry; Waste Management and Disposal; Pollution; General Chemical Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/4924006
• Publisher URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/jctb.6575