JRP CALL information
Supported By

European Commission

Short description of the work

In the framework of the proposed study, batch incubations of depleted uranium (DU) corrosion product with five different soils were performed with artificial rain events during several weeks. The resulting DU-contaminated soils were collected in function of depth and characterized for mineralogy and chemistry. The goal of the bulk and micro-XAS and micro-XRD experiments conducted at SLS was: (1) identify the bulk DU speciation in various soils that were in contact with DU corrosion product; (2) characterize mineralogical changes in the corrosion products at the microscale under various geochemical conditions.
The results obtained for bulk XANES indicate that U(VI) is the dominant oxidation state in the soils. Additionally, micro-XANES data show that U(VI) is distributed diffusely in the soils while there are mixed U(IV)-U(VI) hotspots in both StSul soil (agricultural soil) and Ins soil (organic-rich low pH). Moreover, U-Ca correlation seems observable at the U hotpsots of the Ins soil, while U and Fe seem not correlated.

Main visitor contact data
Name: Dr Yuheng Wang
Organisation: Ecole Polytechnique Fédérale de Lausanne

JRP Identification
JRP nr: TALI-C04-14
JRP title: Potential for mobilization of uranium from depleted uranium (DU) penetrators
JRP scope: Scope 2: Actinide in the geological environment

Visited Associated Pooled Facility
Visited APF during the stay: PSI - MicroXAS Beamline
Name of the APF Contact Person: Daniel Grolimund

Other APF and organisation involved in the JRP
Other organisations involved: University of Vienna (Walter Schenkeveld)
Other APF involved in the project:

Description of the work done at the associated pooled facility
Start date of the stay: 6/15/2015
End date of the stay: 6/18/2015
Quantity of access: 9
Access Unit: Shifts
Misc.: Work during week-end