Kinetics study on sarafloxacin oxidization by permanganate in aqueous environment
LI Xuan1, LIU Zhi-quan1, ZHOU Qi-hao3, ZHU Shi-jun1, XU Yong-peng1,2
1. National Engineer Research Center of Urban Water Resources, Harbin Institute of Technology, Harbin 150090, China; 2. School of Environment, Harbin Institute of Technology, Harbin 150090, China; 3. China Academy of Urban Planning & Design, Beijing 100044, China
Abstract:By evaluating the effects of initial concentration of KMnO4,pH and temperature,experimental studies of sarafloxacin oxidation kinetics by potassium permanganate were investigated.Meanwhile,the kinetics parameters of other fluoroquinolones (e.g.enrofloxacin,ofloxacin,ciprofloxacin,norfloxacin) were compared with those of sarafloxacin,thus providing a feasible approach for degradation and removal of sarafloxacin in the aquatic environment.The results indicated that the kinetic rate of sarafloxacin oxidization by potassium permanganate in the aqueous solution followed the second-order kinetics model.An increase in the initial KMnO4 concentration or temperature corresponded to an increase in the reaction rate.Furthermore,the reaction rate [K=66~91.28L/(mol·min)]under acidic conditions (pH=4~5) was obviously higher than that [K=30~47L/(mol·min)]under the neutral and alkaline conditions.The kinetic parameters of sarafloxacin were similar to those of ciprofloxacin,which could be validated for the determination of relevant parameters of sarafloxacin.
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