| DOI: | 10.2172/1281679
|
| 报告号: | LLNL-TR--696158
|
| 报告题名: | Subsurface Biogeochemistry of Actinides |
| 作者: | Kersting, Annie B.; Zavarin, Mavrik
|
| 出版年: | 2016
|
| 发表日期: | 2016-06-29
|
| 总页数: | 34
|
| 国家: | 美国
|
| 语种: | 英语
|
| 中文主题词: | 生物化学过程
|
| 主题词: | BIOGEOCHEMICAL PROCESSES
|
| 英文摘要: | A major scientific challenge in environmental sciences is to identify the dominant processes controlling actinide transport in the environment. It is estimated that currently, over 2200 metric tons of plutonium (Pu) have been deposited in the subsurface worldwide, a number that increases yearly with additional spent nuclear fuel (Ewing et al., 2010). Plutonium has been shown to migrate on the scale of kilometers, giving way to a critical concern that the fundamental biogeochemical processes that control its behavior in the subsurface are not well understood (Kersting et al., 1999; Novikov et al., 2006; Santschi et al., 2002). Neptunium (Np) is less prevalent in the environment; however, it is predicted to be a significant long-term dose contributor in high-level nuclear waste. Our focus on Np chemistry in this Science Plan is intended to help formulate a better understanding of Pu redox transformations in the environment and clarify the differences between the two long-lived actinides. The research approach of our Science Plan combines (1) Fundamental Mechanistic Studies that identify and quantify biogeochemical processes that control actinide behavior in solution and on solids, (2) Field Integration Studies that investigate the transport characteristics of Pu and test our conceptual understanding of actinide transport, and (3) Actinide Research Capabilities that allow us to achieve the objectives of this Scientific Focus Area (SFA and provide new opportunities for advancing actinide environmental chemistry. These three Research Thrusts form the basis of our SFA Science Program (Figure 1). |
| URL: | http://www.osti.gov/scitech/servlets/purl/1281679
|
| Citation statistics: |
|
| 资源类型: | 研究报告
|
| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42079
|
| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
|
| File Name/ File Size |
Content Type |
Version |
Access |
License |
|
|---|
| 1281679.pdf（12163KB） | 研究报告 | -- | 开放获取 | | View
Download
|
|
| Recommended Citation: | |
Kersting, Annie B.,Zavarin, Mavrik. Subsurface Biogeochemistry of Actinides. 2016-01-01.
|
|
|