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Information × Registration Number 0221U100257, 0119U101868 , R & D reports Title Experimental and theoretical modelling of interaction processes of system of engineering barriers materials of radioactive waste deep repository and development of new composite sorbents of radionuclides on the basis of natural and synthetic matrices. popup.stage_title Head Shabalin Borys H., Registration Date 04-01-2021 Organization State Institution "The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine" popup.description2  It is considered the main elements of multi-barrier protection of deep geological repository of high-level waste (HLW) of mine type and their functional analysis, HLW containers and bentonite buffer as one of the main components of barriers of the near field of deep geological repository of mine type and their evolution during operation and closure, corrosion of steel canisters and processes of transformation of bentonite clays in the conditions of repository, and also archaeological analogues of processes of corrosion of ferrous materials and transformation of bentonite clays. The process of corrosion phase formation on the surface of carbon and stainless steel samples during their contact with the aqueous medium (pH = 9-12 and T = 50-70 °C Εh = +300 mV) and bentonite clay (рН = 7,4-8,2 та Т = 40 °С, Εh = +320 mV) was carried out experimentally under conditions close to the initial and transitional stages of evolution of deep geological repository. A scheme for the synthesis of a new composite sorbent for the selective extraction of Cs ions from contaminated water by in situ deposition of a layer of potassium-copper ferrocyanide on the surface of granules of natural and chemically modified clinoptilolite tuff of the Sokyrnytske deposit was developed and implemented. The sorption of Cs ions from model solutions with a high content of sodium and potassium ions was studied; in the presence of deactivating means "Shield"; depending on the pH of the solution. It is shown that composite samples based on modified clinoptilolite tuff have high selectivity for Cs ions and the best adsorption parameters when sorbed from multicomponent solutions with high salt content. Product Description popup.authors Bondar Yuliia V Buhera Serhii P Kuzenko Svitlana V Lavrynenko Olena M Mitsiuk Natalia B Slyvinskii Viktor M Yaroshenko Konstiantyn K popup.nrat_date 2021-01-04 Close