| DOI: | 10.2172/1151777
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| 报告号: | DOE-OHSU-005324 Final Report
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| 报告题名: | Final Report: Manganese Redox Mediation of UO2 Stability and Uranium Fate in the Subsurface: Molecular and Meter Scale Dynamics |
| 作者: | Tebo, Bradley M.; Tebo, Bradley M.
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| 出版年: | 2014
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| 发表日期: | 2014-09-02
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | uranium
; manganese
; manganese oxides
; bacteria
; oxidation
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| 中文主题词: | 冰上通道
; 水道
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| 主题词: | LEADS
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| 英文摘要: | One strategy to remediate U contamination in the subsurface is the immobilization of U via injection of an electron donor, e.g., acetate, which leads to stimulation of the bioreduction of U(VI), the more mobile form of U, to U(IV), the less mobile form. This process is inevitably accompanied by the sequential reductive dissolution of Mn and Fe oxides and often continuing into sulfate-reducing conditions. When these reducing zones, which accumulate U(IV), experience oxidizing conditions, reduced Fe and Mn can be reoxidized forming Fe and Mn oxides that, along with O2, can impact the stability of U(IV). The focus of our project has been to investigate (i) the effects of Mn(II) on the dissolution of UO2 under both reducing and oxidizing conditions, (ii) the oxidative dissolution of UO2 by soluble Mn(III), (iii) the fate of U once it is oxidized by MnO2 in both laboratory and field settings, and (iv) the effects of groundwater constituents on the coupled Mn(II)/U(IV) oxidation process. Additionally, studies of the interaction of Se, found at the DOE site at Rifle, CO, and Mn cycling were initiated to understand if observed seasonal fluctuations of Se and Mn are directly linked and whether any such linkages can affect the stability of U(IV). |
| URL: | http://www.osti.gov/scitech/servlets/purl/1151777
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/41436
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| 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
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| 1151777.pdf（305KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Tebo, Bradley M.,Tebo, Bradley M.. Final Report: Manganese Redox Mediation of UO2 Stability and Uranium Fate in the Subsurface: Molecular and Meter Scale Dynamics. 2014-01-01.
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