Beamtime at the Small Angle X-ray Scattering beamline (I22) at Diamond Light Source, funded through the Diamond - Manchester collaboration.
Abstract of research proposal: The UK strategy for radioactive waste management is containment in a Geological Disposal Facility (GDF) in the deep sub-surface. Although U(IV) and U(VI) are insoluble in the alkaline environments surrounding a GDF, they can potentially be transported large distances as suspended nanoparticles, with implication for U containment. Here we will quantify the kinetics and mechanism of U(IV) and U(VI)- oxide nanoparticle nucleation and growth under relevant conditions. To achieve this, in situ time-resolved Small Angle X-ray Scattering experiments will be performed to: (a) Quantify the mechanisms of the early stages of Ca-uranate (U(VI)) formation and growth from aqueous solutions across a range of relevant pH and ionic strength conditions; (b) Study the precipitation of UO2 (U(IV)) and the effect of different reducing agents on the formation mechanism, kinetics and particle size.
Smith, K. F., Bryan, N. D., Swinburne, A. N., Bots, P., Shaw, S., Natrajan, L. S., Mosselmans, J. F. W., Livens, F. R. & Morris, K., 1 Jan 2015, In : Geochimica et Cosmochimica Acta.148, p. 343-35917 p.
Research output: Contribution to journal › Article