过硫酸盐和臭氧高级氧化对两种典型喹诺酮类抗生素的降解研究

Study on the degradation of two typical quinolone antibiotics in persulfate and ozone advanced oxidation

系统研究了两种典型喹诺酮类抗生素环丙沙星和诺氟沙星在过硫酸盐和臭氧体系中的降解效能和一级动力学,发现环丙沙星和诺氟沙星均可在15 min内完全去除,其中环丙沙星在PDS体系降解速率更快,而诺氟沙星在两种体系中降解速率一致。通过淬灭实验确定了各催化体系中的主要活性氧化物。研究了水中阴离子和腐殖酸等水中共存污染物在两种体系中对环丙沙星和诺氟沙星降解效果的影响,发现共存污染物均对两种抗生素的降解效能产生一定程度的抑制。在对实际水体中两种抗生素的去除效能研究中发现,由于水中存在较多的杂质,因而两种抗生素的去除效能在一定程度上受到影响,其中在O_(3)系统中,环丙沙星和诺氟沙星的去除受到水质的影响低于在PDS体系中。因此,O_(3)氧化法更适用于实际水中喹诺酮类抗生素的降解去除。

This paper systematically studied the degradation efficiency and first-order kinetics of two typical quinolone antibiotics,CIP and NOR in persulfate and ozone systems,and found that both CIP and NOR can be completely removed within 15 minutes.The degradation rate of CIP was faster than PDS system,while NOR had the same degradation rate in the two systems.The major ROS in each catalytic system were analyzed and determined through quenching experiments.The coexisting pollutants such as inorganic anions and HA in water effected on the degradation of CIP and NOR in the two systems,and it was found that they inhibited the degradation of the two antibiotics to a certain extent.Comparing the degradation efficiency of the two antibiotics in the actual water environment,because there are more impurities in the lake water,which affected the removal of the two antibiotics to a certain extent.In the study of the removal efficiency of the two antibiotics in the actual water environment,it was found that there are more impurities in the river water,which affects the removal of the two antibiotics to a certain extent.In the O_(3) system,the removal of CIP and NOR was less affected in the water quality than in the PDS system.Therefore,the O_(3) oxidation method was more suitable for the degradation and removal of quinolone antibiotics in actual water.