Перегляд за Автор "Halutska, I. Yu."
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Документ Composite ion-exchanger as prospective materials for sorption of uranium(VI) compounds(2016) Perlova, Natalya O.; Perlova, Olha V.; Dzyazko, Yuliya Serhiivna; Sazonova, Valentyna F.; Halutska, I. Yu.; Palchik, Alexey V.; Перлова, Ольга Вікторівна; Перлова, Ольга Викторовна; Сазонова, Валентина Федорівна; Сазонова, Валентина ФедоровнаIn order to obtain organic-inorganic ion-exchanger, the method, which involves reorganization of gel-like cation exchange matrix in non-aqueous media followed by zirconium hydrophosphate precipitation, has been proposed. Reorganization, which is confirmed with standard contact porosimetry and NMR 23Na spectroscopy, means a narrowing of nanosized transport pores of the polymer.Документ Removal of the Uranium(VI) compounds from model solutions with sorbents of different nature(2016) Perlova, Natalya O.; Perlova, Olha V.; Dzyazko, Yuliya Serhiivna; Sazonova, Valentyna F.; Halutska, I. Yu.; Перлова, Ольга Вікторівна; Перлова, Ольга Викторовна; Сазонова, Валентина Федорівна; Сазонова, Валентина ФедоровнаThe problem o f uranium compounds removal from aqueous solutions remains valid for many years. To solve tliis problem, tire sorption methods дге used widely. A search o f sorbents, which would combine availability, cheapness, possibility of regeneration, absorption efficiency in a wide range of pH temperature, and concentration, is an important task. The aim o f this work was to establish an efficiency of sorbents of different nature towards removal of uranium compounds from model solutions.Документ Removal of uranyl cations from iron-containing solutions using composite sorbents based on polymer matrix(2017) Perlova, Olha V.; Dzyazko, Yuliya Serhiivna; Perlova, Natalya O.; Sazonova, Valentyna F.; Halutska, I. Yu.; Перлова, Ольга Вікторівна; Перлова, Ольга Викторовна; Сазонова, Валентина Федорівна; Сазонова, Валентина ФедоровнаSome technologies of uranium recovery from minerals involve hydrochloric acid where cationic forms of uranyl ions dominate. The work is devoted to development and testing of sorbents for removal of uranium(VI) from liquid wastes containing also an excess of Fe(III) ions. Organic-inorganic ionexchangers based on gel-like strongly acidic resin containing zirconium hydrophosphate have been proposed for this purpose. The theoretical approach, which allows us to control a size of incorporated particles, has been applied to modification of the resin with the inorganic constituent. The results of TEM show that the samples contain mainly aggregates of nanoparticles (300 nm) or simultaneously aggregates (200 nm) and agglomerates (several microns). The synthesized organic-inorganic ion-exchangers contain from 10 to 50 mass. % of zirconium hydrophosphate. Composition and structure of the ion-exchangers affect their sorption properties. Sorption of U(VI) from modeling solutions containing also HCl and Fe(III) ions was researched under batch conditions. The initial pH of the solution was within the interval of 2–4, the sorbent dosage was 2–10 g/dm3. Simultaneous sorption of U(VI) and Fe(III) species was shown to occur, the removal of Fe(III) species is faster and more complete. Increasing of the sorbent dosage and the solution pH results in improvement of the efficiency of uranium (VI) removal and increase of the exchange rate. Sorption degree of uranyl cations reaches about 90 % after 3 h at pH 2 and the sorbent dosage of 10 g/dm3. When the sorbent dosage is 5 g/dm3 and the solution pH is 4 the sorption degree reaches 100 % for the composite containing 10 % of the inorganic constituent. The sorption degree is lower for the materials containing higher amount of zirconium hydrophosphate. The rate of sorption has been found to obey mainly particle diffusion model. The models of chemical reaction of pseudo-first or pseudo-second order can be also applied. The composites show mainly higher sorption capacity towards U(VI) at pH 2, the pristine resin demonstrates higher capacity towards Fe(III) under these conditions. The organic-inorganic ion-exchangers can be recommended for polishing of liquid wastes which are formed during monazite processing.Документ Sorption Removal of the Uranium(VI) compounds with organic-inorganic ion-exchangers(2016) Perlova, Natalya O.; Perlova, Olha V.; Halutska, I. Yu.; Dzyazko, Yuliya Serhiivna; Palchik, Alexey V.; Sazonova, Valentyna F.; Перлова, Наталья А.; Перлова, Ольга Вікторівна; Галуцька, І. Ю.; Дзязько, Юлія С.; Пальчик, О. В.; Сазонова, Валентина Федорівна; Перлова, Ольга Викторовна; Сазонова, Валентина ФедоровнаOrsaidc-inorgimic composites based on ion exchmage resins containing zirconium hrvdiophospbate (cation-exchanger) and hydrated zirconium dioxide (anion-exchanger) wse applied to removal of soluble U(VI) compounds from modeling solutions. The advantages of the composites over the pristine resins are more significant sorption capacity, higher sorption rate and more facile regeneration.Документ Аdsorption of U(VI) complexes on anion-exchange resins modified by hydrated zirconium oxide(2017) Perlova, Olha V.; Dzyazko, Yuliya Serhiivna; Halutska, I. Yu.; Ivanova, I.; Palchik, Alexey V.; Перлова, Ольга Вікторівна; Перлова, Ольга ВикторовнаSorption is the most widespread method for removal of uranium(VI) from diluted aqueous solutions. The development of new effective sorbents is in a focus of attention. Organic-inorganic cation-exchangers are prospective materials for sorption of uranyl cations [1-3]. These materials are characterized by higher sorption rate than the inorganic materials, moreover, they are more selective than ion exchange resins. The aim of this work is to a study of adsorption of uranium(VI) compounds from diluted aqueous solution using organic-inorganic sorbents, which were obtained by modification of anion exchange resin EDE-10P with nanoparticles of hydrated zirconium dioxide.