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Fast and complete removal of the 5-fluorouracil drug from water by electro-Fenton oxidation
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Cytostatic drugs are a troublesome class of emerging pollutants in water owing to their potential effects on DNA. Here we studied the removal of 5-fluorouracil from water using the electro-Fenton process. Galvanostatic electrolyses were performed with an undivided laboratory-scale cell equipped with a boron-doped diamond anode and a carbon felt cathode. Results show that the fastest degradation and almost complete mineralization was obtained at a Fe2+ catalyst concentration of 0.2 mM. The absolute rate constant for oxidation of 5-fluorouracil by hydroxyl radicals was 1.52 × 109 M−1 s−1. Oxalic and acetic acids were initially formed as main short-chain aliphatic by-products, then were completely degraded. After 6 h the final solution mainly contained inorganic ions (NH4 +, NO3 − and F−) and less than 10% of residual organic carbon. Hence, electro-Fenton constitutes an interesting alternative to degrade biorefractory drugs.
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GANZENKO, Oleksandra, et al. Fast and complete removal of the 5-fluorouracil drug from water by electro-Fenton oxidation. Environmental Chemistry Letters. 2018. Vol. 16, num. 1, pags. 281-286. ISSN 1610-3653. [consulted: 25 of May of 2026]. Available at: https://hdl.handle.net/2445/133678