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- W3131078952 endingPage "125495" @default.
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- W3131078952 abstract "Levofloxacin (LEV) is a broad-spectrum quinolone antibiotic and widely used for human and veterinary treatment. Overuse of LEV leads to its frequent occurrence in the water environment. In this study, the transformation characteristics of LEV in water during the simulated chlorination disinfection treatment were explored. Fifteen major transformation products (TPs) of LEV were identified, and their plausible formation pathways were proposed. The reaction pathways were strongly dependent on pH condition, and LEV removal was relevant to free available chlorine (FAC) dose. Antibacterial activity of chlorination system was dramatically declined when FAC was more than 3-equivalent (eq) due to the elimination of antibacterial related functional groups. Genotoxicity of chlorination system increased more than 3 times at 0.5-eq of FAC and then decreased with increasing FAC dose, which were in accordance with the relative concentration of toxic TPs estimated by QSAR model. These results implied that the combination of bioassay, QSAR computation and chemical analysis would be an efficient method to screen toxic TPs under chlorination treatment. It is anticipated that the results of this study can provide reference for optimizing operational parameters for water disinfection treatment, and for scientifically evaluating the potential risk of quinolone antibiotics." @default.
- W3131078952 created "2021-03-01" @default.
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- W3131078952 date "2021-07-01" @default.
- W3131078952 modified "2023-10-17" @default.
- W3131078952 title "Bioassay- and QSAR-based screening of toxic transformation products and their formation under chlorination treatment on levofloxacin" @default.
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- W3131078952 doi "https://doi.org/10.1016/j.jhazmat.2021.125495" @default.
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