Reaction of Np(VI) with nitrilotriacetic acid in perchloric acid solutions

被引：1

作者：

Shilov V.P. ^{[1
]}

Fedoseev A.M. ^{[1
]}

Gogolev A.V. ^{[1
]}

机构：

[1] Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, korp. 4, Moscow

来源：

Radiochemistry | 2017年 / 59卷 / 03期

关键词：

kinetics; neptunium(VI); nitrilotriacetic acid;

D O I：

10.1134/S1066362217030031

中图分类号：

学科分类号：

摘要：

Stoichiometry of the reaction of Np(VI) with N(CH2COOH)3 (NTA) in a 0.05 M HClO4 solution was studied by spectrophotometry. With excess Np(VI), 1 mol of NTA reduces 2 mol of Np(VI) to Np(V). In 0.05–0.98 M HClO4 solutions (the ionic strength I = 1.0 was maintained by adding LiClO4) containing 5–30 mmol of NTA, at 25–45°С Np(VI) at a concentration of 0.3–2 mM is consumed in accordance with a firstorder rate law until less than 1/3 of Np(VI) remains in the solution. After that, the reaction decelerates. The reaction is first-order with respect to NTA and has an order of–2 with respect to Н+ ions. The activated complex is formed with the loss of two Н+ ions. The activation energy of the reaction is 100 ± 2 kJ mol–1. © 2017, Pleiades Publishing, Inc.

引用

页码：229 / 232

页数：3