title: Oxidation states of uranium in DU particles from Kosovo.
abstract: The oxidation states of uranium contained in depleted uranium (DU) particles were determined by synchrotron radiation based micro-XANES, applied to individual particles in soil samples collected at Ceja Mountain, Kosovo. Based on scanning electron microscopy (SEM) with XRMA prior to micro-XANES, DU particles ranging from submicrons to about 30 microm (average size: 2 microm or less) were identified. Compared to well-defined standards, all investigated DU particles were oxidized. About 50% of the DU particles were characterized as UO2, the remaining DU particles present were U3O8 or a mixture of oxidized forms (ca. 2/3 UO2, 1/3 U3O8). Since the particle weathering rate is expected to be higher for U3O8 than for UO2, the presence of respiratory U3O8 and UO2 particles, their corresponding weathering rates and subsequent remobilisation of U from DU particles should be included in the environmental or health impact assessments.
authors.affiliation: Isotope Laboratory, Department of Soil and Water Sciences, Agricultural University of Norway, P.O. Box 5028, N-1432 As, Norway. brit.salbu@ijvf.nlh.no
authors.forename: B
authors.initials: B
authors.lastname: Salbu
authors.forename: K
authors.initials: K
authors.lastname: Janssens
authors.forename: O C
authors.initials: OC
authors.lastname: Lind
authors.forename: K
authors.initials: K
authors.lastname: Proost
authors.forename: P R
authors.initials: PR
authors.lastname: Danesi
mesh_terms: D015502:Absorptiometry, Photon; D004781:Environmental Exposure; D004784:Environmental Monitoring; D006801:Humans; D010084:Oxidation-Reduction; D010316:Particle Size; D018570:Risk Assessment; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014501:Uranium / Q000032:analysis / Q000737:chemistry*; D014857:Warfare; D015022:Yugoslavia
chemical_list: D012990:Soil Pollutants, Radioactive; D014501:Uranium