Interaction of neptunium and technetium with UO 2+xстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 февраля 2014 г.
Авторы:
Batuk O.N. ,
Kalmykov S.N. ,
Petrov V.G. ,
Teterin Yu A. ,
Zakharova E.V.
Журнал:
Radiochemistry
Том:
49
Номер:
4
Год издания:
2007
Издательство:
Pleiades Publishing, Inc.
Местоположение издательства:
New York, USA
Первая страница:
409
Последняя страница:
414
DOI:
10.1134/S1066362207040157
Аннотация:
Interaction of uranium dioxide with highly mobile radionuclides 237Np and 99Tc was studied under oxidative conditions. Sorption of these radionuclides at different pH was measured, and the mechanism of redox reaction occurring in the course of their sorption were determined. In alkaline solution, Np(V) is reduced on the UO 2+x surface and is sorbed in the form of tetravalent species. In neutral solutions, Np is sorbed in the form of Np(V). This is due to the fact that the stoichiometry of the UO 2+x surface corresponds to U 4O 9. In acid solution, U(VI) is leached to form surface UO 2. Although the free surface area of a UO 2+x sample is low, the Np distribution coefficients K d at pH > 6 are relatively high: log K d > 2. Unlike Np, Tc(VII) is not reduced on the UO 2+x surface. However, the sorption capacity of uranium dioxide for Tc(IV) is high. © 2007 Pleiades Publishing, Inc.
Добавил в систему:
Калмыков Степан Николаевич