Oxidation of Np(V) with Xenon Trioxide in an HClO4 Solution

Oxidation of Np(V) to Np(VI) with xenon trioxide in a 0.5–1.4 M HClO 4 solution was studied by spectrophotometry. The reaction rate is described by the equation–d[Np(V)]/d t = k [Np(V)][XeO 3 ], where k = 4.6 × 10 –3 L mol –1 s –1 in 1 M HClO 4 at 92°С. The activation energy is close to 92 kJ mol –1...

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Bibliographic Details
Published in:Radiochemistry (New York, N.Y.) N.Y.), 2018-09, Vol.60 (5), p.531-533
Main Authors: Shilov, V. P., Fedoseev, A. M., Gogolev, A. V.
Format: Article
Language:English
Subjects:
Admixtures
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Nuclear Chemistry
Oxidation
Spectrophotometry
Xenon
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Summary:Oxidation of Np(V) to Np(VI) with xenon trioxide in a 0.5–1.4 M HClO 4 solution was studied by spectrophotometry. The reaction rate is described by the equation–d[Np(V)]/d t = k [Np(V)][XeO 3 ], where k = 4.6 × 10 –3 L mol –1 s –1 in 1 M HClO 4 at 92°С. The activation energy is close to 92 kJ mol –1 . The activated complex is formed in contact of NpO 2 + and ХеО 3 without participation of Н + ions. The activated complex transforms into NpO 2 2+ and the products: ОН, Хе, and О 2 . The ОН radical oxidizes Np(V). Admixtures of Со 2+ and especially Fe 3+ accelerate the Np(V) oxidation.
ISSN:1066-3622
1608-3288
DOI:10.1134/S1066362218050090