Peroxymonosulfate Activation by MnO2/CoMoO4/NF for Degradation of Levofloxacin

MnO2/CoMoO4/ NF (Nickel foam) was obtained by loading MnO2 onto the surface of CoMoO4/NF using electrodeposition. The results of degradation experiments showed that the degradation efficiency of levofloxacin (LVF) (15 ppm, pH = 6.12) over MnO2/CoMoO4//NF reached 80.4% in 30 min when the PMS concentration was 0.08 mM. When the pH was lower or higher than the pH value of the original solution, the performance of the material significantly decreased due to the repulsive effect between the catalyst and SO52-. Cobalt and manganese ions exhibited a synergistic effect on the activation of PMS. The HCO3- ions showed the most significant inhibitory effect on the degradation of LVF. The free radical trapping experiments indicated that <middle dot>OH, and O-2(<middle dot>-) were the main active species in the degradation process of levofloxacin. The cyclic stability experiments proved the MnO2/CoMoO4/NF catalysts were efficient, stable and easy to recover.