Milyovich S. Clinoptilolite of Sokyrnytsya deposit: modification, properties, optimization of parameters, practical use

The manuscript is devoted to the determination of the elemental composition of Sokyrnytsya deposit clinoptilolite by modern physical-chemical research methods, the chemical composition of which corresponds to the formula 1.4(Na,K)2O(Ca,Mg)O3Al2O328SiO222H2O, the Si / Al ratio is 4.7. The crystal chemical parameters of the lattice for the natural clinoptilolite (deposit of Sokyrnytsya) were calculated using the powder method: monoclinic syngony, space group C 1 2 / m 1, a = 17.595, b = 17.593, c = 7.415 Å,  = 117.010, V = 2044.95 Å3). Modification of clinoptilolite leads to an increase in the unit cell volume was shown. Treatment with modifier solutions (HCl, NaCl, NH4Cl) does not provide a complete replacement of the clinoptilolite exchange ions. The dominant exchange ion of clinoptilolite is Ca2+, which exchanges ~ 80% of heavy metal ions (HM) - Pb2+,Cd2+,Cu2+ was proved. Thermodynamic calculations the possibility of spontaneous ion exchange of HM ions on clinoptilolite was confirmed. During the sorption of iron ions in the case of singly charged exchange ions, ion exchange is possible for Fe2+ and Fe3+, and in the case of doubly charged - only Fe3+ was shown. The thermodynamic and experimental possibility of ion-exchange sorption of heavy metal ions from soil has been proved (when modeling fulvic acids using salicylic and gallic acids), on the basis of which mechanisms for reducing the concentration of HM ions in soils are proposed. The possibility of reducing the concentration of HM ions when clinoptilolite is introduced into the soil and increasing the pH of the soil was shown. The decrease in the translocation of HM ions from soil to plants has been proven when clinoptilolite of the Sokyrnytsya deposit was introduced. Organomineral fertilizer based on clinoptilolite, which positively affects the yield and quality of potatoes and wheat, was proposed.