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

Research output: Contribution to journalJournal article

Published

Article numbermrsf11-1383-a07-02
Journal publication date2012
JournalMaterials Research Society Symposium Proceedings
Volume1383
Number of pages6
Original languageEnglish

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.