Tobilko V. Development of sorption technologies to protect waters from pollution by heavy metals and radionuclides.

The thesis is devoted to development of sorption technologies to protect waters from pollution by heavy metals and radionuclides using composite materials based on natural clay minerals. The composite sorbents based on natural clay minerals and nanoscale Fe0, (oxy)hydroxides of iron(III) and algae Chlorella vulgaris and Scenedesmua asutus were obtained. Significant increase of the sorption characteristics of the obtained materials was established with regard to the compounds Co(II), Cr(VI) and U(VI) concerning the initial minerals. The forming process of the porous structure of layered silicates at granulating was studied. Sorption capacity of granules with respect to the ions U(VI) in solution was investigated. The efficiency of palygorskite coated with a layer of nano-ferum when creating nanoscale Fe0 in layers of soil sorption screens to protect groundwater from contamination was shown. The research review of the purification effectiveness of the real groundwater from compounds of U(VI) using the composite sorbents was investigated. The technological scheme of obtaining of sorbents. Keywords: heavy metals, natural radionuclides, purification of natural waters, iron compounds, nanoscale iron, silicate composite materials.