诺氟沙星（NOR）是废水中最常见的氟喹诺酮类抗生素之一，其释放和累积会造成一系列生态和环境问题。以稳定、可回收的CoFe₂O₄纳米颗粒为非均相催化剂，在少量过一硫酸盐（PMS）投加条件下研究NOR的降解机理及效率影响因素。结果表明，在PMS浓度为0.5 mmol/L、CoFe₂O₄质量浓度为100 mg/L、pH=7、温度为25℃最佳反应条件下，30 min内NOR降解效率可达95.5%，反应速率常数约0.105 4 min^-1。经过4次循环实验，NOR降解率仍可达到65.5%。

Norfloxacin is one of the most frequently detected fluoroquinolones antibiotics in wastewater,the release and accumulation of norfloxacin will cause a series of ecological and environmental problems.Stable and recyclable CoFe₂O₄ nanoparticles are used as a heterogeneous catalyst to investigate the degradation mechanism of norfloxacin under the condition of a small amount of peroxymonosulfate (PMS) dosage and the influencing factors for removal efficiency.The results indicate that the degradation efficiency of norfloxacin can reach 95.5% and the reaction rate constant is about 0.105 4 min^-1 within 30 minutes when PMS dosage is 0.5 mmol·L^-1,CoFe₂O₄ dosage is 100 mg·L^-1,pH=7,and temperature is 25℃.The degradation efficiency of norfloxacin still reaches 65.5% after the catalyst has been used for four cycle experiments.

魏志远(1995-),男,硕士研究生,研究方向为环境化学,18816933196@139.com