Ferrate Stability Study

Ferrate(VI) is a strong and environmentally friendly oxidant, coagulant, and water treatment agent, which lead to its unprecedented future practical application in many fields. But ferrate(VI) has the property of self-catalysis, unlike the stability of chlorine, which contributes to its low stability in solution and prohibits its wide use. In order to find a solution to this problem and enlarge its scope of use. a series of studys are carried out on it.At first.the affects of different light wave on the stability of ferrate solution have been investigated. At the same time, we put ferrate in the container made by different materials in different condition and ferrate decomposition property in solution whether with ClO- or without ClO-.The results indicates the ferrate was reserved in the container made by polythene have the higher stability in dark which can guide the preparation, applying and preservation of the ferrate in the future.Then studied on several clays affect on the stability of ferrate solution. The results show the addition of clays retarded the decomposition of ferrate in alkaline solution. Through analysed the results of test, we found this due to the silicium or polysilicium of clays and its increasing stabilizing effect on ferrate when the concentration of silicium or polysilicium increases. A bargain stabilizing agent for ferrate solution was found in this way, which is helpful for practical application of ferrate .Based on this factor,we prepared compound ferrate with ferrate, additiontion agent N and clay and determined the concentration of FeO42-.We observed the compound ferrate is relatively stable which simplify technological process and is easy to be reserved.It supply possibility for application of industrialization of the ferrate.Finally.the decolorization of five kinds of dyes with the compound ferrate were investigated.The results show it have low cost good decolorizing efficiencies and non-polluting and so on.lt is possible for practical application of ferrate in waste water treatment.