Kovalchuk I.A.

Cleaning of Contaminated Waters Against U and Cr Compounds Using Pillared Al- and Al/Fe-Clays

In this paper a comprehensive study of adsorption properties of modified clay minerals with polyoxocomplexes (POM) of iron and aluminium with regard to removal of heavy metal ions from an aqueous medium was carried out. To determine changes in structure characteristics of the intercalated minerals have been used methods of X-ray diffraction, nitrogen adsorption with calculated specific surface area and pore size distribution, as well as adsorption of Chromium (VI) and Uranium (VI) ions from aqueous solutions at various pH values.

Remediation of the U(VI) Ions from Waters Using Organic Clays

This paper studies characteristics of sorption of anion and cation forms of uranium (VI), as well as uranium carbonate complexes. By modifying the natural clay mineral montmorillonite by cationic surfactant, we obtain sorbents for uranium remediation from waters. Relying on the methods of XRay diffraction, IR-spectroscopy, turbidimetry, and adsoption, we determine sorptive properties of the natural and modified samples. Furthermore, we prove the effectiveness of using these methods for uranium remediation from waters.

Sorption-reducing treatment of groundwater from uranium compounds

The paper considers the processes of sorptionreducing treatment of water polluted with uranium compounds by various active agents. Our research subject is groundwater selected from the hole near the tailing dump of waste of uranium ore processing from the East ore-dressing and processing enterprise situated near Zhovti Vody. To that end, we utilize the activated sludge of Bortnytska aeration station and Fe0 iron powder as active agents.