摘要
Recently, escalating antibiotics contamination in aquatic environments has become a critical global threat to public health. In this study, a novel cathode catalyst (NH 2 -MIL-101(Fe)@Mel-MoPc/BC) was fabricated via hydrothermal method for efficient degradation of ofloxacin (OFX) through an electro-activated peroxymonosulfate (PMS) system. The incorporation of Mo-C and Fe/Mo-N substantially enhanced the electrocatalytic performance. The influence of various parameters, including the internal mass ratio of the catalyst, current, PMS concentration, OFX concentration, pH, as well as electrolyte concentration and type on OFX degradation were systematically evaluated. Under optimal conditions, OFX degradation reached 92.6 %, with 84.2 % total organic carbon removal, outperforming previous studies. The free radical quenching experiment and electron paramagnetic resonance analysis identified singlet oxygen ( 1 O 2 ) as the dominant active species. In situ Raman spectroscopy, high performance liquid chromatography-mass spectrometry and density functional theory calculation elucidated the degradation mechanism and pathways of OFX, including demethylation, decarboxylation, hydroxylation, and dehydrogenation, ultimately forming water, carbon dioxide, and inorganic ions. Furthermore, computational toxicology and seed germination tests confirmed significantly reduced wastewater toxicity after treatment by electro-activated PMS system based on NH 2 -MIL-101(Fe)@Mel-MoPc/BC cathode. Additionally, it also exhibited superior cyclic stability and excellent performance in various real water matrices and for other organic pollutants such as Rhodamine B, phenol, tetracycline, and dimethyl phthalate, demonstrating great application potential. This work provides valuable insights into cathode catalyst design and establishes a sustainable technology for antibiotic wastewater treatment.
危险品化学品经营许可证（带存储）