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以第三代氟喹诺酮抗生素诺氟沙星(NOR)为目标,采用基于·SO4-的热活化过硫酸盐(PS)工艺对NOR降解过程中的温度、过硫酸盐浓度、pH、阴离子及探针物质等关键因子进行考察优化研究。结果表明,NOR降解符合拟1级动力学模型,且表观速率常数Kapp与PS浓度和温度具有较好的线型相关性,NOR降解的活化能EA为(85.92±12.11)k J/mol;初始PS浓度及反应温度的升高对诺氟沙星的降解速率呈现促进作用;降解反应的最佳p H为4.0,在pH>7情况下反应速率基本不发生改变;体系共存的Cl~-、NO_3~-及CO_3~(2-)对反应均存在不同程度抑制作用,且随着离子浓度升高,抑制作用加强。此外试验发现投加探针物质叔丁醇与苯酚可以有效鉴定不同体系下的自由基反应特性。
Aiming at the third generation of fluoroquinolone antibiotic norfloxacin (NOR), the temperature, persulfate concentration, pH, anion and the content of NOR in the degradation process of NOR were studied by using SO 4 -based heat activated persulfate (PS) Needle material and other key factors to study and optimize the study. The results showed that the degradation of NOR conforms to the first order kinetic model, and the apparent rate constant Kapp has good linear correlation with PS concentration and temperature. The activation energy EA of NOR degradation is (85.92 ± 12.11) kJ / mol. The initial PS concentration and the reaction temperature increased the degradation rate of norfloxacin. The optimum pH of the degradation reaction was 4.0. The reaction rate did not change at pH> 7. The coexistence of Cl ~ , NO_3 ~ - and CO_3 ~ (2) had different degrees of inhibition on the reaction, and with the increase of ion concentration, the inhibition was strengthened. In addition, it was found that the addition of probe material tert-butanol and phenol could effectively identify the radical reaction characteristics under different systems.