JRP CALL information
Supported By

European Commission

Short description of the work
Depleted uranium (DU) in the form of metallic uranium that is used in tank penetrators. In former war theaters, large numbers of DU penetrators are left behind embedded in the soil at various depths. While it is well established that DU will corrode to higher oxidation states, it is unclear what effect that corrosion will have on the mobility of U and the attendant risk of groundwater contamination with U. In this project, we propose to use batch systems to characterize the mobilization of DU as a function of soil biogeochemical conditions. To that end, we used micro-scale X-ray absorption spectroscopy and X-ray diffraction to characterize the U retained in various soils with different geochemical parameters to decipher the speciation of U in the soil after release from the corrosion product. The results show that in all soils, hotspots of crystalline and non-crystalline U(IV) were found where organic matter is available. However, predominant amount of U is present in form of nano-scale particles consisting of U(VI). This shows the complex mechanism of U retention in soil systems.

Main visitor contact data
Name: Dr. Yuheng Wang
Organisation: EPFL

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
Other APF involved in the project:

Description of the work done at the associated pooled facility
Start date of the stay: 3/16/2015
End date of the stay: 3/19/2015
Quantity of access: 10
Access Unit: Shifts

Other APF visitors of the JRP during the stay
Visitor 2: Dr Walter Schenkeveld (University of Vienna)