Preparation of Na 2 FeO 3 and Application in Wastewater treatment

Abstract Na2FeO3 serves as a highly effective water-purifying agent and exhibits superior performance compared with ferrate(VI). The traditional synthesis method of ferrate(IV) requires that the conditions required for the reaction are difficult. This study focuses on the environment-friendly synthesis of green Na2FeO3 crystals using sodium hypochlorite as a medium via a concentration method under depressurization. Green crystallization was meticulously characterized and identified as Na2FeO3 using infrared spectroscopy, UV/Vis spectroscopy, Mössbauer spectroscopy, and X-ray diffraction techniques. This investigation delves into the effect of varying the concentrations of Fe2(SO4)3, NaOH, NaClO, and the reaction temperature on the yield of Na2FeO3, which is apparently lower than that of the traditional method. This study provides important theoretical support for large-scale production of Na2FeO3. In addition, Na2FeO3 was shown to be superior to K2FeO4 in the treatment of oil-recovery wastewater.