Thesis
Uranium contamination of vadose zone sediments from the Hanford U single shell tank farm
Washington State University
Master of Science (MS), Washington State University
2009
Handle:
https://hdl.handle.net/2376/102577
Abstract
Direct push core samples were collected from direct-push hole C5602 near waste storage tank 241-U-105 in Hanford's 241-U Single-Shell Tank Farm. Uranium concentrations decreased with depth in sediments collected from the direct-push hole. Initial characterization testing revealed that uranium from intermediate depth sediments had lower desorption Kds than the other sediments. Subsequent investigations on these sediments suggested that uranium existed as different surface phases on the sediments as a function of depth (Um et al. 2009). Further work was carried out to elucidate the nature of U(VI) release from these contaminated sediments. Of particular interest was the observation that the shallow sediments, which were thought to contain contaminant uranium in the form of U(VI) silicates, seem to have similar Kds to that of the deepest sediment collected from the direct-push hole, which were thought to contain only natural uranium. The primary objective of this research was to determine if the dominant form of uranium in the shallowest sediments collected from direct-push hole C5602 differ from the deeper samples, and if it could be confirmed that uranium in the shallowest sediment was present primarily as U(VI) silicates.
Metrics
2 File views/ downloads
11 Record Views
Details
- Title
- Uranium contamination of vadose zone sediments from the Hanford U single shell tank farm
- Creators
- Benjamin Deeter Williams
- Contributors
- Akram Hossain (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Environment, School of the (CAHNRS)
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525201701842
- Language
- English
- Resource Type
- Thesis