非均相催化氧化法降解水中诺氟沙星机理研究  

Degradation mechanism of norfloxacin in water by heterogeneous catalytic oxidation

作　　者：魏志远 张云霄 占锐 李嘉欣 张猛 刘莉莉[1,2] WEI Zhi-yuan;ZHANG Yun-xiao;ZHAN Rui;LI Jia-xin;ZHANG Meng;LIU Li-li(School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste,Shanghai 200241,China)

机构地区：[1]华东理工大学资源与环境工程学院,上海200237 [2]上海有机固废生物转化工程技术研究中心,上海200241

出　　处：《现代化工》2022年第11期122-128,共7页Modern Chemical Industry

基　　金：国家重点研发计划(2018YFC1901000);上海有机固废生物转化工程技术研究中心开放课题(SERC2021C06)。

摘　　要：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CoFe_(2)O_(4)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、CoFe_(2)O_(4)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0.1054 min。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 CoFe_(2)O_(4) 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 0.1054 minwithin 30 minutes when PMS dosage is 0.5 mmol·L^(-1),CoFe_(2)O_(4) 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.

关 键 词：诺氟沙星 非均相催化氧化 影响因素 降解机理 降解途径 

分 类 号：X171.5[环境科学与工程—环境科学]