Ferrocyanide biosorbents based on lignocellulose waste products for multifunctional purpose

New composite biosorbents based on lignocellulose complex, derived from the waste of food industry – apricot pits, and ferrocyanides of d-metals were synthesized. An influence of pretreatment of initial apricot pits by acid-alkali scheme was established. It was found out that such pretreatment leads to an increase in the specific surface area of the lignocellulose material in two times and the total pore volume up to six times. The physical, chemical, structural properties of the obtained materials were investigated. The sorption behavior of initial materials and lignocellulose-inorganic samples toward cesium-137, heavy metals, Methylene blue, gelatin, vitamin B12 was studied. Comparative analysis of the sorption properties of obtained biosorbents based on different ferrocyanides towards different ecotoxicants was carried out. Obtained results allow to state that new composite biosorbents are universal materials for adsorption of radionuclides, heavy metals and organic pollutants from water solutions and can be used in radiochemistry, analytical chemistry, industry, medicine and veterinary.