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Partial equilibrium in induced redox reactions of plutonium

Conference:

Abstract

A study was made of oxidation-reduction reactions of Pu in buffer solutions containing bichromate and a reducing agent which reacted with hexavalent chromium at pH=3.5. In most cases sodium nitrite was used. A rather slow reduction of Pu (6) with NaNO/sub 2/ in the course of which tetravalent plutonium was formed via disproportionation reaction of plutonium (5), became very rapid upon the addition of bichromate to the solution. The yield of tetravalent plutonium increased with an increase in the concentration of NaNO/sub 2/ and the bichromate but never reached 100%. This was due to a simultaneous occurrenc of the induced oxidation reaction of Pu(4), leading to a partial equilibrium between the valence forms of plutonium in the nitrite-bichromate system which on the whole was in a nonequilibrium state. It was shown that in the series of reactions leading to the reduction of plutonium the presence of bivalent chromium was a necessary link.
Publication Date:
Jan 01, 1975
Product Type:
Conference
Reference Number:
AIX-08-334457; EDB-77-133682
Resource Relation:
Journal Name: Radiokhimiya; (USSR); Journal Volume: 17:5; Conference: Conference on neptunium and plutonium chemistry, Leningrad, USSR, 25 Mar 1975; Other Information: For English traslation see the journal Sov. Radiochem
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; PLUTONIUM; OXIDATION; REDUCTION; BUFFERS; CHEMICAL REACTION KINETICS; CHEMICAL REACTION YIELD; CHROMATES; EQUILIBRIUM; NITRITES; PH VALUE; PLUTONIUM COMPOUNDS; POTASSIUM COMPOUNDS; SODIUM COMPOUNDS; ACTINIDE COMPOUNDS; ACTINIDES; ALKALI METAL COMPOUNDS; CHEMICAL REACTIONS; CHROMIUM COMPOUNDS; ELEMENTS; KINETICS; METALS; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; REACTION KINETICS; TRANSITION ELEMENT COMPOUNDS; TRANSURANIUM COMPOUNDS; TRANSURANIUM ELEMENTS; YIELDS; 400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
OSTI ID:
7098400
Country of Origin:
USSR
Language:
Russian
Other Identifying Numbers:
Journal ID: CODEN: RADKA
Submitting Site:
INIS
Size:
Pages: 713-717
Announcement Date:

Conference:

Citation Formats

Nikol'skii, B P, Posvol'skii, M V, Krylov, L I, and Morozova, Z P. Partial equilibrium in induced redox reactions of plutonium. USSR: N. p., 1975. Web.
Nikol'skii, B P, Posvol'skii, M V, Krylov, L I, & Morozova, Z P. Partial equilibrium in induced redox reactions of plutonium. USSR.
Nikol'skii, B P, Posvol'skii, M V, Krylov, L I, and Morozova, Z P. 1975. "Partial equilibrium in induced redox reactions of plutonium." USSR.
@misc{etde_7098400,
title = {Partial equilibrium in induced redox reactions of plutonium}
author = {Nikol'skii, B P, Posvol'skii, M V, Krylov, L I, and Morozova, Z P}
abstractNote = {A study was made of oxidation-reduction reactions of Pu in buffer solutions containing bichromate and a reducing agent which reacted with hexavalent chromium at pH=3.5. In most cases sodium nitrite was used. A rather slow reduction of Pu (6) with NaNO/sub 2/ in the course of which tetravalent plutonium was formed via disproportionation reaction of plutonium (5), became very rapid upon the addition of bichromate to the solution. The yield of tetravalent plutonium increased with an increase in the concentration of NaNO/sub 2/ and the bichromate but never reached 100%. This was due to a simultaneous occurrenc of the induced oxidation reaction of Pu(4), leading to a partial equilibrium between the valence forms of plutonium in the nitrite-bichromate system which on the whole was in a nonequilibrium state. It was shown that in the series of reactions leading to the reduction of plutonium the presence of bivalent chromium was a necessary link.}
journal = {Radiokhimiya; (USSR)}
volume = {17:5}
place = {USSR}
year = {1975}
month = {Jan}
}