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Hydrolysis of Hydroxamic Acid Complexants in the Presence of Non-Oxidizing Metal Ions

Published online by Cambridge University Press:  10 February 2012

Scott Edwards ,
Fabrice Andrieux ,
Colin Boxall ,
Robin Taylor  and
David Woodhead
Scott Edwards
Affiliation:
Engineering Deparment, Lancaster University, Lancaster, Lancashire, LA1 4YW, U.K.
Fabrice Andrieux
Affiliation:
Engineering Deparment, Lancaster University, Lancaster, Lancashire, LA1 4YW, U.K.
Colin Boxall
Affiliation:
Engineering Deparment, Lancaster University, Lancaster, Lancashire, LA1 4YW, U.K.
Robin Taylor
Affiliation:
The National Nuclear Laboratory, Central Laboratory, Sellafield, Cumbria, CA20 1PG, U.K.
David Woodhead
Affiliation:
The National Nuclear Laboratory, Central Laboratory, Sellafield, Cumbria, CA20 1PG, U.K.
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Abstract

Simple Hydroxamic acids (XHAs) are salt free, organic compounds with affinities for hard cations such as Fe3+, Np4+, Pu4+ and have been identified as suitable reagents for the control of Pu and Np in advanced nuclear fuel reprocessing. Building upon previous work on the neptunium(IV)-formohydroxamic(FHA) acid system [1], a model that describes the hydrolysis of the acetohydroxamate moiety has been extended to include hydrolysis of bishydroxamatoneptunium(IV) complex. The model has been used to determine the rate constants for hydrolysis of mono- and bis-acetohydroxamatoneptunium(IV) at 25 °C, which were found to be 1.0×10-5 dm3 mol-1 s-1 and 5.0×10-5 dm3 mol-1 s-1, respectively.

Keywords

actinidekineticsPu
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1383: Symposium A – Material Challenges in Current and Future Nuclear Technologies , 2012 , mrsf11-1383-a07-02
Copyright
Copyright © Materials Research Society 2012

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References

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