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• W3129511164 endingPage "105249" @default.
• W3129511164 startingPage "105249" @default.
• W3129511164 abstract "This study reports the performance of high-frequency ultrasound (US, 1.7 MHz), coupled with a photo-Fenton-like process using persulfate and UV LEDs (UV/PS/Fe2+), for eliminating organic micropollutants and bacteria separately and simultaneously in deionized and natural water. Water matrices, containing atrazine (ATZ)/bisphenol A (BPA) and Escherichia coli/Enterococcus faecalis, were sequentially treated by UV/PS/Fe2+ and UV/US/PS/Fe2+ processes. The highest degradation rates by UV/US/PS/Fe2+ process were found for BPA in both matrices, achieving complete removal and synergistic effects (φ > 1). In terms of inactivation, this process was most efficient in deionized water for reducing E. coli and E. faecalis by 3 and 5 logs, respectively. The addition of bacteria inhibited the degradation in both matrices by decreasing the pseudo first-order rate constants up to one order of magnitude. In turn, the addition of micropollutants delayed the inactivation to various extents only in deionized water. In natural water, the co-existence of micropollutants accelerated the inactivation of E. coli, reaching 100% in 5 min with BPA and 7 min with ATZ (vs. 10 min without ATZ or BPA). The more resistant E. faecalis showed similar inactivation kinetics regardless of the added compound. Induction of oxidative stress in cells by micropollutants and higher exposure to additional ROS via (sono)photosensitization reactions are suggested as responsible for enhancing inactivation in natural water. The UV doses required for 90% degradation in the presence of bacteria (2.6–7.7 J/cm2) provide the simultaneous inactivation. Results show that the sono-photo-Fenton-like process could be a promising alternative for simultaneous water treatment and disinfection." @default.
• W3129511164 created "2021-03-01" @default.
• W3129511164 creator A5015390773 @default.
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• W3129511164 creator A5083721870 @default.
• W3129511164 date "2021-06-01" @default.
• W3129511164 modified "2023-09-26" @default.
• W3129511164 title "Evaluating (sono)-photo-Fenton-like processes with high-frequency ultrasound and UVA LEDs for degradation of organic micropollutants and inactivation of bacteria separately and simultaneously" @default.
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