Synthesis of Ferrocyanide Sorbents in Polysaccharide Matrices

The data on the possibility of obtaining transition metal ferrocyanides, which are highly selective compounds with respect to cesium, in polysaccharide matrices (cellulose, chitin, chitosan) are systematized and generalized. Based on the electron microscopy data, it has been found that the distribution of the sorption active component (nickel ferrocyanide) in the chitosan matrix is fairly uniform. The crystallite sizes calculated from X-ray powder diffraction data are significantly higher for Zn–K chitosan/ferrocyanide sorbent as compared to Ni–K and Cu–K chitosan/ferrocyanide sorbents. A comparative analysis of the sorption properties and stabilities of the Zn–K, Zn–Ni, and Cu–K chitosan/ferrocyanide sorbents and sorbent Thermoxide-35 in the extraction of cesium from alkaline mineralized solutions and seawater has been carried out.