Studies on the degradation of ofloxacin by Electron Beam irradiation in aqueous solution
FU Xing-ming1,2, LUO Min2, MA Ling-ling2, YANG Guo-sheng2, XU Dian-dou2, LIU Zhi-ming1
1. State Key Laboratory of Chemical Resource Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 2. Division of Nuclear Technology and Applications, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
Abstract：The influence factors and mechanism of the degradation of ofloxacin in water by electron linear accelerator was investigated. In order to study the role of radicals, ofloxacin solution with initial concentration of 20mg/L was used in degradation with the doses of 0.5, 1.0, 2.0, 3.0 and 5.0 kGy, respectively, for each of different conditions. The solution were saturated with air as a scavenger of hydrated electron, saturated with nitrogen, containing 0.005 mol/L sodium chloride, 0.05 mol/L sodium chloride, 0.05 mol/L tert-butanol as scavenger of hydroxyl radical, 0.005 mol/L sodium carbonate, and 0.005 mol/L sodium sulfate, respectively. It was found that the degradation rate was promoted under the condition of saturated air, and could reach 99% with irradiation dose of 2.0 kGy. The presence of sodium chloride, tert butyl alcohol and sodium carbonate significently inhibited the degradation rate of ofloxacin, however, sodium sulfate had little effect on the degradation. This fact indicates that hydroxyl radicals play a key role in the degradation of loxacin. Based on the product analysis in irradiation by ultra performance liquid chromatography-mass spectrometry (UPLC-MS), the degradation pathway has be deduced as well.
付兴明, 罗敏, 马玲玲, 杨国胜, 徐殿斗, 刘志明. 电子束辐照降解水中氧氟沙星的研究[J]. 中国环境科学, 2016, 36(10): 3033-3039.
FU Xing-ming, LUO Min, MA Ling-ling, YANG Guo-sheng, XU Dian-dou, LIU Zhi-ming. Studies on the degradation of ofloxacin by Electron Beam irradiation in aqueous solution. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(10): 3033-3039.
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