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 ·OH, and O₂^·− 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.