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 HNO3 solution, 1.2 × 10−3 M Ce(IV) can oxidize Pu(IV) with concentration of 4.3 × 10−5 M to Pu(VI) completely within 40 min, while 2.4 × 10−3 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.
This is a preview of subscription content, log in to check access.
Cleveland JM (1970) The chemistry of plutonium. Gordon and Breach Science Publishers, New YorkGoogle Scholar
Allard B, Olofsson U, Torstenfelt B (1984) Environmental actinide chemistry. Inorg Chim Acta 94:205–221CrossRefGoogle Scholar
Choppin GR (1988) Humics and radionuclide migration. Radiochim Acta 44(45):23–28Google Scholar
Cohen D (1961) Electrochemical studies of plutonium ions in perchloric acid solution. J Inorg Nucl Chem 18:207–210CrossRefGoogle Scholar
Wilson RE, Hu YJ, Nitsche H (2005) Detection and quantification of Pu(III, IV, V, VI) using a 1.0 m liquid core waveguide. Radiochim Acta 93:203–206CrossRefGoogle Scholar
Lee MH, Park YJ, Kim WH (2007) Absorption spectroscopic properties for Pu(III, IV and VI) in nitric and hydrochloric acid media. J Radioanal Nucl Chem 273:375–382CrossRefGoogle Scholar
Cho HR, Jung EC, Park KK (2010) Effect of reduction on the stability of Pu(VI) hydrolysis species. Radiochim Acta 98:555–561CrossRefGoogle Scholar
Silver GL (1967) Determination of plutonium oxidation states in dilute nitric acid by complementary tristimulus colorimetry. Talanta 14:637–641CrossRefGoogle Scholar
Spevackova V, Guichard C, Cauchetier P (1978) The effect of americium-241 on the determination of plutonium by the silver(II) oxide method. Anal Chim Acta 96:189–194CrossRefGoogle Scholar
Seils CA, Meyer RJ, Larsen RP (1963) Amperometric titration of plutonium(VI) with iron(II). Anal Chem 35:1673–1675CrossRefGoogle Scholar
Cauchetier P (1981) Spectrophotometric determination of plutonium after oxidation with cerium(IV). Anal Chim Acta 124:449–452CrossRefGoogle Scholar
Savage DJ, Kyffin TW (1986) Oxidative breakdown of polymeric plutonium(IV) hydroxide by cerium(IV). Polyhedron 5:743–752CrossRefGoogle Scholar
Walther C, Cho HR, Marquardt CM (2007) Hydrolysis of plutonium(IV) in acidic solutions: no effect of hydrolysis on absorption-spectra of mononuclear hydroxide complexes. Radiochim Acta 95:7–16CrossRefGoogle Scholar
Weast RC (1988) Handbook of chemistry and physics. CRC Press Inc, Boca RatonGoogle Scholar