Structural and adsorptive properties of silica-alumina and clay materials of mineral and synthetic origin

Location on territory of Ukraine of great deposits of aluminosilicates together with good facilities for their processing and standardization promotes the study of this raw material, results of which could be useful for the developers of enterosorbents. For search the specific sorptive activity a comparative examination of several materials of silica-alumina and clay nature has been carried out in this work. The X-ray phase analysis, a measuring of specific surface area by the low temperature adsorption–desorption of nitrogen and the method of isotherm of adsorption have been used. It is shown that silica-alumina and clay materials have much less specific surface as compared to silica gel Syloid® 244 FP and carbon sorbent SCN. The sorbents of montmorillonite type (smectite, saponite) are characterized by the highest adsorptive capacity in relation to methylene blue and congo red dyes. Synthetic zeolites NaA and NaX effectively absorb the ions of zinc from solution, significantly overcoming Syloid® 244 FP and SCN which were taken as preparations of comparison. Therefore, on the basis of NaA and NaX the selective enterosorbents for elimination from the organism of toxic metals could be created.