Affiliation:
1. Osipyan Institute of Solid State Physics, Russian Academy of Sciences
2. Institute of Microelectronics Technology and Highly Pure Materials, Russian Academy of Sciences
3. Institute of Physiologically Active Substances, Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences
4. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Abstract
Received January 16, 2023; revised March 21, 2023; accepted March 27, 2023 Extraction of U(VI), Th(IV), REE(III), and Sc(III) from nitrate and perchlorate solutions with solutions of phosphorylpodand 1,5-bis[di( p -tolyl)phosphoryl]-3-oxapentane (L) in 1,2-dichloroethane depending on the concentration of acids in the aqueous phase was studied. The stoichiometry of the extractable complexes was determined. It was found that, as the concentration of acids increases, the magnitude of the «perchlorate» e ect decreases, and at acid concentrations above 0.3 mol/L, REE(III) ions are extracted by podand L from HClO4 solutions less e ciently than from HNO3 solutions. During the extraction of Sc(III), the «perchlorate» e ect also manifests itself in the region of high acid concentration, which leads to an increase in the separation coe cients of Sc(III) and REE(III), U(VI), and Th(IV) during extraction with podand L from HClO4 solutions.
Publisher
The Russian Academy of Sciences
Reference22 articles.
1. Myasoedov B.F., Kalmykov S.N., Kulyako Yu.M., Vinokurov, S.E. // Geochem. Int. 2016. Vol. 54, N 13. P. 1156.
2. Аляпишев М.Ю., Бабаин В.А., Устынюк Ю.А. // Успехи химии. 2016. Т. 85, № 9. С. 943.
3. Leoncini A., Huskens J., Verboom W. // Chem. Soc. Rev. 2017. Vol. 46. P. 7229.
4. Розен А.М., Крупнов Б.В. // Успехи химии. 1996. Т. 65, № 11. С. 1052.
5. Чмутова М.К., Литвина М.Н., Прибылова Г.А., Иванова Л.А., Смирнов И.В., Шадрин А.Ю., Мясоедов Б.Ф. // Радиохимия. 1999. Т. 41, № 4. С. 331.