Thesis-2005-Walker.pdf (23.61 MB)
Investigation of the interactions of uranium and plutonium with Boom clay organic matter
thesis
posted on 2018-10-25, 10:09 authored by Gareth WalkerThe solubility of uranium (IV) oxide, UO2, was investigated. Uranium (VI) was reduced to
uranium (IV) using sodium dithionite and iron granules at high pH (NaOH). A solubility
enhancement of UO2 in the presence of Boom clay humic acid (BCHA) was found to be
approximately one order of magnitude, where the solubility of UO2 (10-9 to 10-8 mol dm-3) was
increased to 10-7 mol dm-3 by BCHA. The solubility product (Ksp) of aqueous U(OH)4 and
stability constant (β141) for BCHA-U(OH)4 were calculated from experimental data using a novel
approach utilising the side reaction coefficient theory ('A' term). A log Ksp value of -54.51 for
U(OH)4, and a log β141 value of 51.36 for BCHA-U(OH)4 were calculated. [Continues.]
Funding
European Union (TRANCOM-II project, 'Migration case study: transport of radionuclides in a reducing clay sediment').
History
School
- Science
Department
- Chemistry
Publisher
© Gareth WalkerPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2005Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en