LAUSR

The comparative analysis of sorption properties of nanostructured barium silicates obtained in multicomponent systems BaCl2 · 2H2O–КОН–SiO2–H2O and BaCl2 · 2H2O–КОН–SiO2–AlCl3–H2O has been performed to extend previous data; the data on the composition and morphology of the systems have been presented. Their properties toward sorption of Sr2+ ions from solutions of complex ionic composition have been studied. It has been found that synthetic barium silicates and alumosilicates have high sorption and kinetic characteristics under static sorption conditions. The maximal degree of Sr2+ ions recovery from solutions of complex composition (>99%) was achieved for barium silicate BaSiO3 · 2.3H2O. The samples of barium alumosilicate BaAl2Si2O8 · 2.6H2O have the same sorption characteristics within measurement error. It has been shown that the studied sorbents, allowing for their kinetic properties, may be recommended for the deep purification of solutions of complex ionic composition, seawater including, from strontium ions under static conditions.