The aim of this work is to investigate the effect of potassium permanganate (KMnO4) on the photocatalytic degradation of hexafluorobisphenol A (BPAF) by peroxymonosulfate (PMS). The influences of the experimental conditions such as PMS and permanganate dosage

solution pH were analyzed. Furthermore

the process for the oxidative removal of BPAF in natural water was confirmed and its efficiency compared with that of UV/PMS process. Results showed that KMnO4 had a positive effect on the BPAF degradation in the UV/PMS process. The degradation efficiency was increased with the increase of PMS dosage. With the dosage of KMnO4 increased from 0 to 1.5 μmol/L

the optimum removal efficiency of BPA obtained when PMS was 1 mmol/L. Further addition of KMnO4

however

had no significant promotion on the extent of BPAF oxidation efficiency. BPAF degradation rate inhibited with increasing the pH under acidic condition

while promoted significantly under alkaline condition. The BPAF removal percentage in UV/PMS/KMnO4 was about 12%-14% higher than in UV/PMS system in actual water. The mechanism of the synergetic combination of PMS with KMnO4 for BPA degradation under the UV irradiation indicated that the catalytic oxidation of some reactive manganese intermediates generated in the UV/PMS/Mn(Ⅶ) process.