Preparation of Potassium Ferrate and Ferrate(VI) Oxidation of Phenanthrene

Abstract

Potassium ferrate has good application prospect in water treatment owing to its strong oxidation in the entire pH range and its decomposition Fe3+ with the characteristics of non-toxic and good coagulation effect of flocculation, etc. In this paper, the main material is calcium hypochlorite, which is used to optimize the preparation of potassium ferrate by traditional hypochlorite oxidation methods without applying chlorine in addition. XRD and IR were used to characterize the final product-potassium ferrate; while the concentration of potassium ferrate solution is determined using direct spectrophotometric method for quantitative analysis during the reaction system. The results show that the reaction temperature 25 °C, re-crystallization temperature -5 °C and reaction time 40 minutes will make yield up to 80% and the purity of the product to 97%. As the representitive substance of polycyclic aromatic hydrocarbon (PAHs), Phenanthrene can be used as target object in the analysis of K2FeO4’ oxidation property when pH is 9.5 and illuminated by xenon lamp. The result shows that as reaction concentration is 10mg/L, phenanthrene’s degradation effect becomes very obvious while accumilative degradation ratio reaches up to 65.5% after 60 mins of system reaction.