Synthesis of potassium ferrate using residual ferrous sulfate as iron bearing material

International audienceSynthesis of potassium ferrate using residual ferrous sulfate as iron bearing material To cite this article: N Kanari et al 2013 J. Phys.: Conf. Ser. 416 012013 View the article online for updates and enhancements. Related content Integrated transformations of plant biomass to valuable chemicals, biodegradable polymers and nanoporous carbons B N Kuznetsov, N V Chesnokov, V E Taraban'ko et al.-Synthesis of Li 5 AlO 4 involving a repulpation mixing in a Li 2 CO 3 saturated solution Ol'ga N Krivolapova and Vadim P Tarasov-Oxygen Compounds of Iron(VI, V, IV) I G Kokarovtseva, I N Belyaev and L V Semenyakova-Abstract. This paper summarizes the results obtained during potassium ferrate (K 2 Fe VI O 4) synthesis which is a high added value material. This compound that contains iron in the rare hexavalent state is becoming a substance of growing importance for the water and effluent treatment industries. This is due to its multi-functional nature (oxidation, flocculation, elimination of heavy metals, decomposition of organic matter, etc.). The most well known synthesis methods for potassium ferrate synthesis are those involving the chemical and/or electrochemical oxidation of iron (II) and (III) from aqueous solutions having a high alkali concentration. These methods are generally characterized by a low Fe VI efficiency due to the reaction of the potassium ferrate with water, leading to the reduction of Fe VI into Fe III. Concerning the work pertinent to this paper, the synthesis of K 2 Fe VI O 4 was achieved by a simultaneous reaction of two solids (iron sulfate and KOH) and one gaseous oxidant (chlorine). The synthesis process is performed in a rotary reactor at room temperature and the global synthesis reaction is exothermic. The effects of different experimental parameters on the potassium ferrate synthesis are investigated to determine the optimal conditions for the process