Spectrophotometric investigation of plutonium

Spectrophotometric investigation of plutonium

In order to prepare a pure Pu(VI) solution, the oxidation of Pu(IV) to Pu(VI) by cerium(IV) was investigated with a UV-Visible spectrophotometer equipped with a 0.5 m liquid core waveguide. The degree of the oxidation of Pu(IV) was studied as function of the Ce(IV) concentration and the reaction tim...

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Veröffentlicht in:Journal of radioanalytical and nuclear chemistry 2016-10, Vol.310 (1), p.201
Hauptverfasser: Yi, Xiaowei, Dang, Haijun, Zeng, Bin, Lin, Jianfeng, Li, Mei, Yu, Gongshuo
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Cerium
Oxidation-reduction reaction
Waveguides
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container_title Journal of radioanalytical and nuclear chemistry
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creator Yi, Xiaowei
Dang, Haijun
Zeng, Bin
Lin, Jianfeng
Li, Mei
Yu, Gongshuo
description In order to prepare a pure Pu(VI) solution, the oxidation of Pu(IV) to Pu(VI) by cerium(IV) was investigated with a UV-Visible spectrophotometer equipped with a 0.5 m liquid core waveguide. The degree of the oxidation of Pu(IV) was studied as function of the Ce(IV) concentration and the reaction time. The study showed that in 1 M HNO.sub.3 solution, 1.2 x 10.sup.-3 M Ce(IV) can oxidize Pu(IV) with concentration of 4.3 x 10.sup.-5 M to Pu(VI) completely within 40 min, while 2.4 x 10.sup.-3 M Ce(IV) can do it within 15 min. The oxidation reaction of Pu(IV) by Ce(IV) is a first order process with respect to Pu(IV) according to the data analysis. From a thermodynamic point of view, the reaction can proceed almost completely provided that amount of the Ce(IV) is greater than stoichiometric amount.
doi_str_mv 10.1007/s10967-016-4882-6
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Oxidation-reduction reaction
Waveguides
title Spectrophotometric investigation of plutonium
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