Reaction of Np(VI) with N-(2-Hydroxyethyl)ethylenediaminetriacetic acid in perchloric acid solutions
- Авторы: Shilov V.1, Fedoseev A.1
-
Учреждения:
- Frumkin Institute of Physical Chemistry and Electrochemistry
- Выпуск: Том 58, № 1 (2016)
- Страницы: 10-12
- Раздел: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/223327
- DOI: https://doi.org/10.1134/S1066362216010033
- ID: 223327
Цитировать
Аннотация
The stoichiometry of the reaction Np(VI) + H3hedta [hedta is N-(2-hydroxyethyl)ethylenediaminetriacetate, HEDTA, anion] in a 0.05 M HClO4 solution was studied by spectrophotometry. With Np(VI) in excess, 1 mol of HEDTA reduces 4 mol of Np(VI) to Np(V). In 0.125–1.0 M HClO4 solutions (the ionic strength of 1.0 was maintained constant by adding LiClO4), containing 3–29.2 mM HEDTA, at 20–45°С Np(VI) at a concentration of 0.4–3.5 mM is consumed in accordance with a first-order rate law until approximately 40% of Np(VI) remains. Then, the reaction decelerates. The reaction rate has first order with respect to [HEDTA] and the order of–1.6 with respect to [Н+]. The activated complex arises with the loss of one and two Н+ ions. The activation energy is 88.4 ± 5.3 kJ mol–1.
Ключевые слова
Об авторах
V. Shilov
Frumkin Institute of Physical Chemistry and Electrochemistry
Автор, ответственный за переписку.
Email: shilovV@ipc.rssi.ru
Россия, Leninskii pr. 31, korp. 4, Moscow, 119071
A. Fedoseev
Frumkin Institute of Physical Chemistry and Electrochemistry
Email: shilovV@ipc.rssi.ru
Россия, Leninskii pr. 31, korp. 4, Moscow, 119071