Back to Search
Start Over
Corrosion and fate of depleted uranium penetrators under progressively anaerobic conditions in estuarine sediment
- Source :
- Handley-Sidhu, S, Worsfold, P J, Boothman, C, Lloyd, J R, Alvarez, R, Livens, F R, Vaughan, D J & Keith-Roach, M J 2009, ' Corrosion and fate of depleted uranium penetrators under progressively anaerobic conditions in estuarine sediment ', Environmental Science and Technology, vol. 43, no. 2, pp. 350-355 . https://doi.org/10.1021/es8021842
- Publication Year :
- 2009
-
Abstract
- The testing of armor-piercing depleted uranium (DU) "penetrators" has resulted in the deposition of DU in the sediments of the Solway Firth, UK. In this study, DU-amended, microcosm experiments simulating Solway Firth sediments under high (31.5) and medium (16.5) salinity conditions were used to investigate the effect of salinity and biogeochemical conditions on the corrosion and fate of DU, and the impact of the corroding DU on the microbial population. Under suboxic conditions, the average corrosion rates were the same forthe 31.5 and 16.5 salinity systems at 0.056 ± 0.006 g cm-2 y-1, implying that complete corrosion of a 120 mm penetrator would take approximately 540 years. Under sulfate-reducing conditions, corrosion ceased due to passivation of the surface. Corroding DU resulted in more reducing conditions and decreased microbial diversity as indicated by DNA sequencing and phylogenetic analysis. The lack of colloidal and particulate DU corrosion products, along with measurable dissolved U and a homogeneous association of U with the sediment suggest that U was transported from the penetrator surface into the surrounding environment through dissolution of U(VI), with subsequent interactions resulting in the formation of secondary uranium species in the sediment © 2009 American Chemical Society.
- Subjects :
- Biogeochemical cycle
Geologic Sediments
Time Factors
Population
chemistry.chemical_element
Deposition (geology)
Corrosion
Rivers
Environmental Chemistry
Anaerobiosis
education
Phylogeny
education.field_of_study
Bacteria
Environmental engineering
Sediment
Water
General Chemistry
Uranium
United Kingdom
Salinity
Solutions
Biodegradation, Environmental
chemistry
Environmental chemistry
Microcosm
Oxidation-Reduction
Geology
Subjects
Details
- ISSN :
- 0013936X
- Volume :
- 43
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Environmental sciencetechnology
- Accession number :
- edsair.doi.dedup.....6b9227dc2ce3aaa450e3ae594dd007fd