Kinetics of the reduction of plutonium(IV) by hydroxyurea, a novel salt-free agent |
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Authors: | Zhu Zhaowu He Jianyu Zhang Zefu Zhang Yu Zheng Weifang |
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Institution: | (1) Department of Radiochemistry, China Institute of Atomic Energy, Beijing, 102413, P.R. China |
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Abstract: | The kinetics of the reduction of plutonium(IV) by hydroxyurea (HU), a novel salt free reductant, in nitric acid solutions
has been studied. The observed reaction rate can be expressed as: -dPu(IV)]/dt=k
0Pu(IV)]2HU]/H+]0.9, where k
0 = 5853±363 (l1.1.mol-1.1.s-1) at t = 13 °C. The activation energy is about 81.2 kJ/mol. The study also shows that uranium(VI) has no appreciable influence on
the reaction rate. Compared with other organic reductants our experiments indicate that HU is a very fast reductant for plutonium(IV).
This revised version was published online in July 2006 with corrections to the Cover Date. |
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