Efficient degradation of norfloxacin by synergistic activation of PMS with a three-dimensional electrocatalytic system based on Cu-MOF

• Published in: Separation and purification technology 2025-04, Vol.356, p.129945, Article 129945
• Main Authors: Li, Yun, Bu, Jiaqi, Sun, Yirui, Huang, Zihan, Zhu, Xiuhao, Li, Shang, Chen, Ping, Tang, Yalan, He, Guowen, Zhong, Shian
• Format: Article
• Language: English
• Subjects: CCK-8; Norfloxacin degradation; Peroxymonosulfate; Synergistic activation
• ISSN: 1383-5866
• DOI: 10.1016/j.seppur.2024.129945

[Display omitted] •3D/Cu-MOF/EC/PMS system has better degradation effect on NOR.•The synergistic degradation efficiency of the Cu-MOF material with the electric field is enhanced by nearly 64 % relative to the degradation efficiency of the two alone.•The NOR degradation mechanism was revealed using DFT calculations.•The toxicity of NOR and its degradation intermediates was evaluated by biotoxicity tests (TEST test and CCK-8 cytotoxicity experimental studies). In this work, Cu-based metal-organic framework material (Cu-MOF) was combined with an electric field to construct a three-dimensional electrocatalytic synergistic activation of peroxymonosulfate sulfate (PMS) system (3D/Cu-MOF/EC/PMS) for the degradation of norfloxacin (NOR). The results show that the synergistic degradation efficiency of the Cu-MOF material with the electric field is enhanced by nearly 64 % relative to the degradation efficiency of the two alone. The quenching experimental and EPR characterization indicates that ROS plays an important role in the degradation process, with O2– playing a dominant role. Finally, the degradation pathway of NOR was explored by DFT study and LC-MS tests, and the toxicity evaluation software (TEST) and CCK-8 cytotoxicity experimental studies demonstrated that the sewage after the degradation of NOR by this system would have little or no effect on human liver cells (L02). This study not only shows that the 3D/Cu-MOF/EC/PMS system can treat the water containing higher concentrations of NOR into a state that is not harmful to the human body but also provides a new idea for the improvement of catalysts that do not have obvious catalytic degradation effects.