Application of FeⅢ-TAML/H2O2 system for treatment of fluoroquinolone antibiotics

作者：Zeyu Xian; Sijia Liang; Xin Jin; Haoting Tian^*; Jingyi Ling; Chao Wang^*

来源：Journal of Environmental Sciences, 2021, 99(01): 110-118.

Over the recent past, fluoroquinolone antibiotics(FQs) have raised extensive attention due to their potential to induce the formation of resistance genes and "superbugs", thus various advanced oxidation techniques have been developed to eliminate their release into the environment. In the present study, the prototype tetraamido macrocyclic ligand(FeⅢ-TAML)/hydrogen peroxide(H2O2) system is employed to degrade FQs(i.e., norfloxacin and ciprofloxacin) over a wide p H range(i.e., p H 6-10), and the reaction rate increases with the increase in p H level. The effect of dosage of FeⅢ-TAML and H2O2 on the degradation of FQs is evaluated, and the reaction rate is linearly correlated with the added amount of chemicals. Moreover, the impact of natural organic matters(NOM) on the removal of FQs is investigated, and the degradation kinetics show that both NOM type and experimental concentration exhibit negligible influence on the oxidative degradation of selected antibiotics. Based on the results of liquid chromatography-high resolution mass spectrometry and theoretical calculations, the reaction sites and pathways of FQs by FeⅢ-TAML/H2O2 system are further predicted and elucidated.

• 单位
  污染控制与资源化研究国家重点实验室; 南京大学