Final Report: Molecular mechanisms and kinetics of microbial anaerobic nitrate-dependent U(IV) and Fe(II) oxidation

doi:10.2172/1171384

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DOI	10.2172/1171384
报告编号	DOE-UCM--BioU
来源ID	OSTI ID: 1171384
	Final Report: Molecular mechanisms and kinetics of microbial anaerobic nitrate-dependent U(IV) and Fe(II) oxidation
	O'Day, Peggy A.; Asta, Maria P.; Kanematsu, Masakazu; Beller, Harry; Zhou, Peng; Steefel, Carl
	2015-02-27
出版年	2015
页数	3
语种	英语
国家	美国
领域	地球科学
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.
英文关键词	Uranium anaerobic oxidation kinetics reactive transport modeling X-ray absorption spectroscopy Thiobacillus denitrificans
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/6910
专题	地球科学
推荐引用方式 GB/T 7714	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.