TY - JOUR

T1 - Hydrolysis of Hydroxamic Acid Complexants in the Presence of Non-Oxidizing Metal Ions

AU - Boxall, Colin

AU - Andrieux, Fabrice

AU - Edwards, Scott

AU - Taylor, Robin J.

AU - Woodhead, Dave

PY - 2012

Y1 - 2012

N2 - 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.

AB - 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.

KW - HYDROXAMIC ACID COMPLEXANTS

KW - neptunium

KW - urex

U2 - 10.1557/opl.2012.210

DO - 10.1557/opl.2012.210

M3 - Journal article

VL - 1383

JO - MRS Online Proceedings Library

JF - MRS Online Proceedings Library

SN - 0272-9172

M1 - mrsf11-1383-a07-02

ER -