硫酸根自由基降解氟喹诺酮抗生素动力学模型构建

发布时间：2018-06-09 21:15

  本文选题：热激活 + 硫酸根自由基　； 参考：《中南大学学报(自然科学版)》2016年01期

【摘要】：针对水环境中广泛残留的氟喹诺酮类抗生素污染问题,采用热激活过硫酸盐方式降解3种典型氟喹诺酮抗生素(环丙沙星、诺氟沙星、恩诺沙星),考察其在不同pH下的降解情况,构建相关自由基动力学氧化模型,并将数学模型与实验数据相耦合计算体系中特征自由基的浓度及目标物拟二级动力学反应常数。研究结果表明:建立的模型能够较好地描述氟喹诺酮微观反应动力学,反应体系中·SO_4~-及·HO浓度受pH影响较大,环丙沙星、诺氟沙星、恩诺沙星与·SO_4~-反应的二级动力学常数分别为6.96×107±2.31,2.52×10~7±4.47和8.55×10~7±1.98L/(mol·s)。
[Abstract]:In view of the contamination of fluoroquinolones widely residual in water environment, three typical fluoroquinolones (ciprofloxacin, norfloxacin) were degraded by thermal activated persulfate. The degradation of enrofloxacin at different pH was investigated and the kinetic oxidation model of related free radicals was constructed. The mathematical model was coupled with the experimental data to calculate the concentration of characteristic free radicals and the pseudo-second-order kinetic reaction constants of the target compounds. The results show that the model can describe the kinetics of fluoroquinolone reaction. The concentration of so _ 4 and Ho in the reaction system is greatly affected by pH, ciprofloxacin, norfloxacin, and norfloxacin. The second-order kinetic constants of enrofloxacin and so _ 4- reaction were 6.96 脳 107 卤2.31 卤2.52 脳 10 ~ (7) 卤4.47 and 8.55 脳 10 ~ (7) 卤1.98 L / mol / s, respectively.
【作者单位】： 四川大学建筑与环境学院;同济大学水污染与控制国家重点实验室;四川省医学科学院四川省人民医院;
【基金】：国家科技重大专项(2012ZX07403-001) 四川省环保科技计划项目(2013HB08) 中央高校基本科研业务费资助项目(2082604184026)~~
【分类号】：X131.2
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本文编号：2000853