The Stability of Potassium Ferrate in Water

The influencing factors of the stability for the potassium ferrate (K2FeO4), including pH, alkalinity, O3, KI, KClO3, KCl, NaClO3 and Na2SiO3, were studied in this work. The results showed that the K2FeO4 stability in water is best at about pH=10. The higher the alkalinity is, the stronger of K2FeO4 stability would be. The O3 had no effect to improve the K2FeO4 stability. The K2FeO4 stability would be best in water with 15mmol/L NaClO3, 10mmol/L Na2SiO3 and 9mol/L alkalinity. Under this condition, the K2FeO4 content would be 83.28% after 24h.