Radiolysis of TcO4 - in Alkaline, Nitrate Solutions:  Reduction by NO3 2

The radiation chemistry of pertechnetate has been examined in highly alkaline solution. In the presence of selected, organic O- scavengers, radiolysis reduces TcO4 - with varying radiation chemical yields, which depend on the reduction potentials of the organic radicals produced during radiolysis. W...

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Bibliographic Details
Published in:The journal of physical chemistry. A, Molecules, spectroscopy, kinetics, environment, & general theory Molecules, spectroscopy, kinetics, environment, & general theory, 2001-10, Vol.105 (41), p.9611-9615
Main Authors: Lukens, Wayne W, Bucher, Jerome J, Edelstein, Norman M, Shuh, David K
Format: Article
Language:English
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Summary:The radiation chemistry of pertechnetate has been examined in highly alkaline solution. In the presence of selected, organic O- scavengers, radiolysis reduces TcO4 - with varying radiation chemical yields, which depend on the reduction potentials of the organic radicals produced during radiolysis. When aminopolycarboxylates are used as O- scavengers, the radiation chemical yield for pertechnetate reduction, G(−TcO4 -) is equal to 1/3 G(eaq -), which strongly implies that the organic radicals produced by the reaction of O- with aminopolycarboxylates are unreactive toward the technetium species present in solution. In the presence of excess nitrate, TcO4 - is still efficiently reduced during radiolysis when aminopolycarboxylates are used as O- scavengers. This observation is consistent with the reduction of TcO4 - by NO3 2-.
ISSN:1089-5639
1520-5215
DOI:10.1021/jp004534y