Radiochemistry
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Production of High-Purity 90Y on Specially Developed Centrifugal Semicounterflow Extractors
Radiochemistry - Tập 44 Số 1 - Trang 62-66 - 2002
The developed process for producing 90Y is based on semicountercurrent extraction separation with phase inversion on two series-connected blocks of centrifugal extractors. The main advantage of the suggested process over the known procedures is the practically unlimited output capacity of the installation: from trace amounts to several tens of curie in cycle; the possible limitations are only impo...... hiện toàn bộ
A comparative study of the chemical properties of element 120 and its homologs
Radiochemistry - Tập 55 - Trang 461-465 - 2013
The electronic structure and energetics were calculated for molecules of binary compounds of element 120 and its homologs with common elements strongly differing in chemical properties. The calculations were performed within the framework of the relativistic density functional theory using the model of precision two-component atomic core pseudopotentials. The results obtained show that all the exa...... hiện toàn bộ
Vapor deposition of technetium coatings by thermolysis of volatile carbonyl complexes: I. Conditions and efficiency of coating deposition from various starting compounds
Radiochemistry - Tập 51 - Trang 576-582 - 2009
Technetium carbonyl complexes [TcBr(CO)5], [TcI(CO)5], [TcX(CO)3]4 (X = Cl, Br, I), [TcBr(CO)3en] (en = ethylenediamine), [Tc(RCOCHCOR′)(CO)3(Et2NH)] [R = CH3 or C(CH3)3, R′ = CF3], Tc2(CO)10, and [Tc(C5H5)(CO)3] were tested as starting compounds for chemical vapor deposition of technetium coatings. The conditions of deposition of technetium coatings were determined, and the deposition yields were...... hiện toàn bộ
Extraction of Am(III) from Nitric Acid Solutions with Bis(diphenylphosphinylmethyl)phosphinic Acid
Radiochemistry - Tập 46 - Trang 49-53 - 2004
Extraction of trace quantities of Am(III) from aqueous HNO3 solutions with solutions of bis(diphenylphosphinylmethyl)phosphinic acid (I), bis[2-(diphenylphosphinyl)phenoxymethyl]phosphinic acid (II), and bis[2-(diphenylphosphinylmethyl)phenoxymethyl]phosphinic acid (III) in dichloroethane was studied. The stoichiometry of the extractable complexes was determined; the effect of organic diluent on t...... hiện toàn bộ
Sorption of Radium from Tap Water with Inorganic Sorbents
Radiochemistry - Tập 62 - Trang 198-203 - 2020
Radium-224 isolated from a generator having the form of a solution of thorium and Trilon B with pH 6.5–7.0 (molar ratio 4 : 1) was used to examine the sorption of radium from tap water by inorganic sorbents of T-3A, T5(400), and T5 (MnO2) brands under dynamic and static conditions.
Sorption-barrier properties of granitoids and andesite-basaltic metavolcanites with respect to Am(III) and Pu(IV): 1. Absorption of Am and Pu from groundwater on monolithic samples of granitoids and andesite-basaltic metavolcanites
Radiochemistry - Tập 49 - Trang 305-312 - 2007
A model study is made of the sorption-barrier properties of intact monolithic samples of granitoids and andesite-basaltic metavolcanites with respect to Am(III) and Pu(IV). In sorption from simulated groundwater (pH 8.3), the surface distribution coefficient in surface sorption K
a was determined to be 8–37 and 4–80 cm for Am and Pu, respectively. The mineral components of the rock...... hiện toàn bộ
Radiation Chemical Behavior of Tributyl Phosphate, Dibutylphosphoric Acid, and Its Zirconium Salt in Organic Solutions and Two-Phase Systems
Radiochemistry - Tập 47 - Trang 392-397 - 2005
Radiation-induced and hydrolytic decomposition of HDBP and its zirconium salt in organic solutions and two-phase aqueous-organic systems in the presence of TBP and nitric acid is studied. The yields of radiation-induced decomposition of HDBP and temperature dependences of its hydrolysis rate constants are determined. Kinetic equations for radiation-induced decomposition of HDBP are derived.
Coprecipitation of microamounts of Cs with ferrocyanides of various metals
Radiochemistry - Tập 46 - Trang 479-480 - 2004
Coprecipitation of microamounts of Cs with ferrocyanides of various metals, exhibiting a high sorption activity with respect to Cs ions, was studied. The distribution coefficients of 117Cs were determined in coprecipitation with the ferrocyanides in 0.1 M NaNO3. The precipitated ferrocyanide was separated from solution by filtration through a Trumem metal-ceramic membrane. Cesium is recovered most...... hiện toàn bộ
Thermodynamics of Alkali Metal Uranoniobates
Radiochemistry - Tập 45 - Trang 261-272 - 2003
The results of thermodynamic studies of alkali metal uranoniobates are summarized. The thermodynamic functions of formation of alkali metal uranoniobates, reactions of their synthesis, and ionic equilibria involving these compounds are analyzed.
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