Intensification of sonochemical degradation of antibiotics levofloxacin using carbon tetrachloride

Ultrasonics Sonochemistry
Weilin GuoGuangyou Zhang

Abstract

Sonochemical degradation of levofloxacin was investigated to assess the operational parameters and the impacts of rate enhancers (CCl(4)) and rate inhibitors (t-butanol). Different dosages of CCl(4), pH value of solutions, ultrasonic power, and initial concentration of levofloxacin which affected the degradation of levofloxacin were studied. The degradation rate of levofloxacin was accelerated with increased concentrations of CCl(4) via the accumulation of reactive chlorine species and the hindrance of ()OH radical combination reactions with atomic hydrogen. The addition of t-butanol at all test concentrations inhibited the degradation of levofloxacin regardless of the quantity of ()OH radicals in solution. It was also found that 5-day biochemical oxygen demand (BOD(5)) of the solution increased evidently after sonochemical treatment, and the ratio of BOD(5)/COD that was a good measure for biodegradability increased from 0 to 0.41, which indicated that biodegradability of the solution was obviously enhanced. Based on the results, it is feasible that sonochemical oxidation can be used for pretreatment of levofloxacin effluent before biological treatment processes.

Citations

Apr 2, 2014·Environmental Science and Pollution Research International·Arlen Mabel Lastre-AcostaAntonio Carlos Silva Costa Teixeira
Oct 30, 2015·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Long WangLan Ding
Jan 10, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Katia González LabradaUlises Javier Jáuregui-Haza
Dec 15, 2020·Journal of Environmental Health Science & Engineering·Andrea Luca TascaMonica Puccini
May 12, 2021·Ultrasonics Sonochemistry·Pengyun LiuGiancarlo Cravotto
Jun 29, 2021·Chemosphere·Lorena A GoulartManuel A Rodrigo
Oct 22, 2021·Molecular Pharmaceutics·Yiwang Guo, Changquan Calvin Sun

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