Preparation, Properties, and Application of Modified Mikoton Sorbents

To improve the performance of chitin-containing Mikoton-Ch sorbent, it was modified with K2Cu[Fe(CN)6] or Fe2O3. The sorbents modified with a mixture of these agents were also prepared. The modifying agents are strongly fixed on the Mikoton surface. The techniques for preparing the modified Mikoton are described. The sorption of Cs, Sr, Pu, and Am on modified Mikoton sorbents was studied in relation to the modifier content. Mikoton modified with K2Cu[Fe(CN)6] efficiently sorbs 137Cs with the distribution factor Kd of up to 104 ml/g but exhibits low sorption power for Sr, Pu, and Am. Mikoton modified with Fe3O4 is a ferromagnetic material. This sorbent exhibits increased sorption power for Pu and Am (Kd = 104-105 ml/g) but poorly sorbs 137Cs. The feasibility of practical application of different kinds of modified Mikoton sorbents is demonstrated.