| DOI: | 10.2172/1171384
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| 报告号: | DOE-UCM--BioU
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| 报告题名: | Final Report: Molecular mechanisms and kinetics of microbial anaerobic nitrate-dependent U(IV) and Fe(II) oxidation |
| 作者: | O'Day, Peggy A.; Asta, Maria P.; Kanematsu, Masakazu; Beller, Harry; Zhou, Peng; Steefel, Carl
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| 出版年: | 2015
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| 发表日期: | 2015-02-27
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| 总页数: | 3
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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
; anaerobic oxidation
; kinetics
; reactive transport modeling
; X-ray absorption spectroscopy
; Thiobacillus denitrificans
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| 中文主题词: | 吸收
; 吸附作用
; X射线
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| 主题词: | ABSORPTION
; X-RAY
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| 英文摘要: | In this project, we combined molecular genetic, spectroscopic, and microscopic techniques with kinetic and reactive transport studies to describe and quantify biotic and abiotic mechanisms underlying anaerobic, nitrate-dependent U(IV) and Fe(II) oxidation, which influences the long-term efficacy of in situ reductive immobilization of uranium at DOE sites. In these studies, Thiobacillus denitrificans, an autotrophic bacterium that catalyzes anaerobic U(IV) and Fe(II) oxidation, was used to examine coupled oxidation-reduction processes under either biotic (enzymatic) or abiotic conditions in batch and column experiments with biogenically produced UIVO2(s). Synthesis and quantitative analysis of coupled chemical and transport processes were done with the reactive transport modeling code Crunchflow. Research focused on identifying the primary redox proteins that catalyze metal oxidation, environmental factors that influence protein expression, and molecular-scale geochemical factors that control the rates of biotic and abiotic oxidation. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1171384
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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/41941
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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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| 1171384.pdf（146KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
O'Day, Peggy A.,Asta, Maria P.,Kanematsu, Masakazu,et al. Final Report: Molecular mechanisms and kinetics of microbial anaerobic nitrate-dependent U(IV) and Fe(II) oxidation. 2015-01-01.
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