Miamisburg, OH, United States
Miamisburg, OH, United States

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Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013

The equilibrium fractions of soluble tri- and hexavalent Pu depend on the pH and the Pu oxidation number. Both fractions can exhibit maxima as the pH changes at constant N. A fraction at maximum can be used to estimate the equilibrium constant of the first hydrolysis reaction of tetravalent Pu. A new formula that renders least-squares estimates of this constant is illustrated. © 2012 Akadémiai Kiadó, Budapest, Hungary.


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013

Maxima in the fractions of the trivalent and hexavalent oxidation states of plutonium are inherent in the algebra of its disproportionation reactions. The maxima do not support overall disproportionation equations as satisfactory representations of aqueous plutonium. © 2013 Akadémiai Kiadó, Budapest, Hungary.


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2013

Formulas that estimate the equilibrium constant of the first hydrolysis reaction of tetravalent Pu have recently appeared. Their differential expressions are used to illustrate the effects of errors on the estimates of this constant. Four new formulas that estimate the hydrolysis constant are illustrated. © 2013 Akadémiai Kiadó, Budapest, Hungary.


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

Equations representing disproportionation reactions should be numerically verifiable. Comprehensive, balanced equations for plutonium disproportionation reactions can be verified in several ways. Overall equations for Pu disproportionation reactions do not meet all the requirements. © 2014 Akadémiai Kiadó.


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

Local maxima in the fractions of the trivalent and hexavalent oxidation states are inherent in the algebra of Pu disproportionation reactions. A new method predicts the pH and the oxidation-state fractions at maximum. Tabulated results illustrate the effects of the Pu oxidation number and Pu(IV) hydrolysis on the maxima. This method suggests a new laboratory approach for discovering Pu oxidation-state maxima. © 2014 Akadémiai Kiadó.


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2016

Disproportionation reactions can noticeably change the acidity of a plutonium solution. The estimation of the pH change depends on the the Pu concentration, the initial oxidation-state distribution, the initial pH of the solution, and the values of three equilibrium constants. The method can be used to estimate the minimum Pu concentration that produces a specified change in the solution acidity. The results can be checked. © 2016 Akadémiai Kiadó, Budapest, Hungary


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

An abridged method for estimating plutonium oxidation-state distributions is illustrated. The new approach uses three simultaneous equations. It generates the same oxidation-state distribution in four ways using the solution pH and the Pu oxidation number. © 2014 Akadémiai Kiadó, Budapest, Hungary


Silver G.L.,Mound Laboratory
Journal of Radioanalytical and Nuclear Chemistry | Year: 2016

Equilibrium distributions of the four plutonium oxidation states can be obtained from their oxidation-reduction potentials. These distributions are used to develop comprehensive, balanced disproportionation equations. The equations are used to predict combinations of the Pu oxidation number and the solution pH that render local maxima in the fractions of trivalent and hexavalent plutonium. The maxima are characterized by the solution pH and the Pu oxidation number. © 2015, Akadémiai Kiadó, Budapest, Hungary.

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