NDLI: Reductive Dissolution of PuO$_{2}$(am): The Effect of Fe(II) and Hydroquinone

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Reductive Dissolution of PuO$_{2}$(am): The Effect of Fe(II) and Hydroquinone

Content Provider	Springer Nature Link
Author	Rai, Dhanpat Gorby, Yuri A. Fredrickson, Jim K. Moore, Dean A. Yui, Mikazu
Copyright Year	2002
Abstract	PuO$_{2}$(am) solubility was investigated as a function of time, for pH from 0.5 to 11, and in the presence of 0.001 M FeCl$_{2}$ or 0.00052 M hydroquinone to determine the effect of environmentally important reducing agents on PuO$_{2}$(am) solubilization under geological conditions. Equilibrium was reached in <4 days. The observed PuO$_{2}$(am) solubilities were many orders of magnitude higher than the Pu(IV) concentrations predicted from thermodynamic data. Spectroscopic, solvent extraction, and thermodynamic analyses of data showed that Pu(III) was the dominant aqueous oxidation state. The experimental pH, pe, and Pu(III) concentrations from both the Fe(II) and hydroquinone systems provided a log K $^{0}$ value of 15.5 ± 0.7 for [PuO$_{2}$(am) + 4H$^{+}$ + e $^{−}$ ⇌ Pu$^{3+}$ + 2H$_{2}$O]. The data show that reduction reactions involving Fe(II) and hydroquinone are relatively rapid and that reductive dissolution of PuO$_{2}$(am), hitherto ignored, may play an important role in controlling Pu behavior under reducing environmental conditions.
Starting Page	433
Ending Page	453
Page Count	21
File Format	PDF
ISSN	00959782
Journal	Journal of Solution Chemistry
Volume Number	31
Issue Number	6
e-ISSN	15728927
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2002-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Physical Chemistry Industrial Chemistry/Chemical Engineering Condensed Matter
Content Type	Text
Resource Type	Article
Subject	Biochemistry Molecular Biology Biophysics Physical and Theoretical Chemistry

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