The main task is to contribute to a better understanding of the coupled adsorption and electron transfer interface reactions governing the retention of redox-sensitive radionuclides on Fe(II()/Fe(III) bearing clay minerals. To address this issue, the interaction between redox-sensitive radionuclides (e.g. U, Tc, or Se), and purified Fe(II)/(III)-containing clay minerals will be investigated by combining adsorption experiments under different relevant geochemical conditions, molecular scale speciation using X-Ray adsorption spectroscopy and adsorption modelling. The aim is to correlate mineral properties with respect to its redox reactive iron content (structural/adsorbed) (i.e. abundance, location in the crystal structure, and oxidation state(s)) to the degree of radionuclides retention and molecular scale surface speciation.
Coupled adsorption and electron transfer interface reactions governing the retention of redox-sensitive Se and Tc on Fe(II)/Fe(III) bearing clay minerals
Start date: 01/11/2019
End date: 31/10/2023
University: Paul Scherrer Institut
Promotor: Sergey Churakov
Research performed by Yanting Qian.
EURAD Work Packages involved
WP5 - FUTURE