Preparation and Application of Sustained-Release Potassium Ferrate(VI)‎

Abstract EN

In this study, a composite system for the sustained release of potassium ferrate(VI) (sustained-release K2FeO4) was prepared and applied for water treatment.

The objective of this research was to maximize the effectiveness of K2FeO4 for water treatment by enhancing its stability using diatomite.

The sustained-release K2FeO4 was characterized using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy.

The results indicated that no new crystal phase was formed during the preparation and some K2FeO4 crystals entered the pores of the diatomite.

From K2FeO4 release experiments, we found that the decomposition rate of K2FeO4 was obviously decreased, which greatly improved the contact rate between released K2FeO4 and pollutants.

Via degradation of methyl orange, which was used as a model pollutant, the influential factor of K2FeO4 content within the complete sustained-release K2FeO4 system was studied.

The optimal K2FeO4 content within the sustained-release K2FeO4 system was approximately 70%.

In natural water samples, sustained-release K2FeO4 at a dosage of 0.06 g/L and with a reaction time of 20 minutes removed 36.84% of soluble microbial products and 17.03% of simple aromatic proteins, and these removal rates were better than those observed after traditional chlorine disinfection.