OXIDATIVE DEGRADATION OF NORFLOXACIN ANTIBIOTICS WITH PEROXYMONOSULFATE ACTIVATED BY CO3O4/Uio-66-NH2 COMPOSITES

Norfloxacin (NOR) is one of the most widely used antibiotics in animal farming and hospital. With the mass production and consumption, the large amounts of NOR was discharged into the water environment which caused severe pollution problems. Advanced oxidation processes (AOPs) can decompose, mineralize most organic compounds, including NOR. In this paper, a novel AOPs catalyst based on peroxymonosulfate (PMS), Co3O4/Uio-66-NH2 composites were prepared. The morphology and structure of the composites were shown in this paper. Degradation experimental results show that Co3O4/Uio-66-NH2 composites have better degradation efficiency than Co3O4 nanoparticles, and the leaching concentration of cobalt ions is lower, indicating that the composite material has better stability than Co3O4 alone. Under the conditions of 1.0mM PMS and 0.20g/L, Co3O4/Uio-66-NH2 dosage at neutral pH, about 90% of norfloxacin (NOR) can be degraded within 30 min. In addition, the mechanism of PMS activation by Co3O4/Uio-66-NH2 composites were studied through the free radical identification by quenching experiments and electron paramagnetic resonance (EPR) technology. In addition, the Co3O4/ Uio-66-NH2 composites material has good regeneration efficiency, which has a certain application prospect for the removal of NOR from drinking water, and this work will also provide a potential contribution to the removal of NOR from the environment.