Degradation of enrofloxacin by Fe activated PDS.

In this paper, the effect of zero-valent iron (Fe) activated persulfate (PDS) on the removal of enrofloxacin (ENR) was investigated, and the effect and mechanism were analyzed by exploring the effects of Fe concentration, PDS concentration, pH, and the influence of anion and aqueous matrix on the removal of ENR by the Fe/PDS system. The results showed that when [ENR] = 20 µmol/L, [Fe] = 0.15 g/L, [PDS] = 0.4 mmol/L, the removal rate of ENR was 85.3% at 90 min, the mainradicals were HO, SO and O. At the same time, the system had a good mineralization effect (TOC removal rate > 40%), in addition, the system did not show obvious toxicity to soil microorganisms after the reaction, furthermore the Fe/PDS system had a good removal effect on ENR in a wide pH range (4 ≤ pH ≤ 10). There is basically no difference in the removal rate of Fe/PDS system in ultrapure water and river water. The results of this experiment could provide a reference for the removal of antibiotics based on advanced oxidation techniques based on SO.