Galysh V. Synthesis and properties of selective toward radiocesium of cellulose and lignocellulose sorbents modified with nanoclusters of ferrocyanides of 3d-metals

Cellulose and lignocellulose sorbents, modified with nanoclusters of ferrocyanides of 3d-metals selective toward radiocaesium were synthesized and a comprehensive assessment of their structural and sorption properties were done. The influence in changes of synthesis conditions on the properties of the modified cellulose material, namely modifier content, the size of its nanoclusters and sorption ability to 137Cs, was analyzed. The influence of pH on the stability of the modifier content retention in the bulk of organic carrier was researched. The regularities of sorption of micro- and macroquantities of caesium on combined sorbents based on ferrocyanide of different 3d-metals were determined. High sorption and selective ability of synthesize composite materials to radiocaesium from individual solutions as well as from the solutions of a complex salt composition, that simulated the vat residue of the nuclear power plant with the water-cooled power reactor, was shown. Combined ferrocyanide sorbents based on lignocellulosic complex were synthesized. The dependence between the concentration of the modifier in solution, its nanoclusters size, content in the bulk of carrier and the sorption ability toward 137Cs was established. Efficiency of sorbents toward iodine, organic dyes, vitamin B12 and gelatin, that simulating ecotoxicants of different nature, was investigated. It was shown that lignocellulose sorbents modified with nanoclusters of ferrocyanide of 3d-metals can be universal sorbents both radionuclides and toxicants.