Uranium, thorium, and REE behavior in oxalate and oxalate-formate media

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription or Fee Access

Abstract

Thorium, uranium, and REE behavior in oxalic and oxalic–formate media was investigated. Thorium oxalate solubility in ammonium formate was determined. Some advice for uranium separation from thorium and REE was made. It is preferred to precipitate REE oxalates and to precipitate thorium oxalate with a non-isotopic carrier.

Full Text

Restricted Access

About the authors

А. S. Kornilov

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

O. S. Dmitrieva

State Scientific Center-Research Institute of Atomic Reactors

Author for correspondence.
Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

Е. V. Vasyunina

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

K. O. Kopaneva

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

A. R. Zamaltdinova

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

N. O. Pozigun

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

V. А. Boldakov

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

S. S. Poglyad

State Scientific Center-Research Institute of Atomic Reactors

Email: osdmitrieva@niiar.ru
Russian Federation, Zapadnoe shosse 9, Dimitrovgrad, Ulyanovsk oblast, 433510

References

  1. Тураев Н.С., Жерин И.И. Химия и технология урана: учеб. пособие для вузов. М.: ЦНИИАТОМИНФОРМ, 2005. 407 с.
  2. Половов И.Б., Абрамов А.В., Камалов Р.В. Ядерно-химическая технология тория: учеб. пособие. Екатеринбург: Изд-во Уральского ун-та, 2019. 147 с.
  3. Leturcq G., Costenoble S., Grandjean S. Uranyl Oxalate Solubility [Электронный ресурс] // ResearchGate. 2008. URL: https://www.researchgate.net/publication/ 318495477_Uranyl_oxalate_solubility (дата обращения: 22.03.2024).
  4. Комиссарова Л.Н., Шацкий В.М., Пушкина Г.Я., Щербакова Л.Г., Мамсурова Л.Г., Суханова Г.Е. Соединения редкоземельных элементов. Карбонаты, оксалаты, нитраты, титанаты. М.: Наука, 1984. 235 с.
  5. Яцимирский К.Б., Костромина Н.А., Шека З.А., Давиденко Н.К., Крисс Е.Е., Ермоленко В.И. Химия комплексных соединений редкоземельных элементов. Киев: Наук. думка, 1966. 493 с.
  6. Рябчиков Д.И., Рябухин В.А. Аналитическая химия редкоземельных элементов и иттрия. М.: Наука, 1966. 381 с.
  7. Erten Η.N., Mohammed A.K., Choppin G.R. // Radiochim. Acta. 1994. Vol. 66/67. P. 123–128.
  8. Путилина В.С. Сорбционные процессы при загрязнении подземных вод тяжелыми металлами и радиоактивными элементами: аналит. обзор. Новосибирск: СО РАН, 2014. 127 с.
  9. Зинченко А.В., Изотова С.Г. Новый справочник химика и технолога. Химическое равновесие. Свойства растворов. СПб.: АНО НПО “Профессионал”, 2004. 998 с.
  10. Матюха В.А., Карелин А.И. Оксалатные соединения лантаноидов, актиноидов и некоторых переходных элементов. М.: Энергоатомиздат, 1991. 2-е изд., перераб. и доп. 280 с.

Supplementary files

Supplementary Files
Action
1. JATS XML
2. Fig. 1. Determination of uranium solubility depending on the pH of the medium and the molar ratio of oxalate ions and uranium using mathematical modeling.

Download (109KB)
3. Fig. 2. Determination of uranium solubility and concentration of dioxalatouranilate anion depending on the pH of the medium and excess of oxalate ions using mathematical modeling. Initial uranium concentration 0.7 mol/l.

Download (123KB)
4. Fig. 3. Determination of the solubility of europium depending on the pH of the medium and the concentration of oxalate ions using mathematical modeling.

Download (188KB)
5. Fig. 4. Concentration of thorium in mother solutions of oxalate precipitation depending on the acidity of the medium.

Download (77KB)
6. Fig. 5. Dependence of thorium concentration in the mother liquor on pH.

Download (78KB)
7. Fig. 6. Dependence of the concentrations of uranium, thorium and europium in solution on the molar ratio of oxalate anions and uranium.

Download (214KB)
8. Fig. 7. Concentrations of uranium, thorium and europium in the solution above the precipitates of their oxalates depending on the pH of the ammonium formate solution. The concentration of ammonium formate is 2 mol/l.

Download (94KB)
9. Fig. 8. Concentration of uranium, thorium and europium in solution above precipitates of their oxalates depending on the concentration of ammonium formate solution. pH 3.5.

Download (97KB)
10. Fig. 9. Dependence of the thorium concentration in washing solutions on the concentration of ammonium formate.

Download (114KB)

Copyright (c) 2025 Russian Academy of Sciences