The role of nanopores on U(VI) sorption and redox behavior in U(VI)-contaminated subsurface sediments

doi:10.2172/1096552

GSTDTAP > 地球科学

DOI	10.2172/1096552
报告编号	DOE-UW-02150
来源ID	OSTI ID: 1096552
	The role of nanopores on U(VI) sorption and redox behavior in U(VI)-contaminated subsurface sediments
	Xu, Huifang; Roden, Eric E.; Kemner, Kenneth M.; Jung, Hun-Bok; Konishi, Hiromi; Boyanov, Maxim; Sun, Yubing; Mishra, Bhoopesh
	2013-10-16
出版年	2013
页数	521K
语种	英语
国家	美国
领域	地球科学
英文摘要	Most reactive surfaces in clay-dominated sediments are present within nanopores (pores of nm dimension). The behavior of geological fluids and minerals in nanopores is significantly different from those in normal non-nanoporous environments. The effect of nanopore surfaces on U(VI) sorption/desorption and reduction is likely to be significant in clay-rich subsurface environments. Our research results from both model nanopore system and natural sediments from both model system (synthetic nanopore alumina) and sediments from the ORNL Field Research Center prove that U(VI) sorption on nanopore surfaces can be greatly enhanced by nanopore confinement environments. The results from the project provide advanced mechanistic, quantitative information on the physiochemical controls on uranium sorption and redox behavior in subsurface sediments. The influence of nanopore surfaces on coupled uranium sorption/desorption and reduction processes is significant in virtually all subsurface environments, because most reactive surfaces are in fact nanopore surfaces. The results will enhance transfer of our laboratory-based research to a major field research initiative where reductive uranium immobilization is being investigated. Our results will also provide the basic science for developing in-situ colloidal barrier of nanoporous alumina in support of environmental remediation and long term stewardship of DOE sites.
英文关键词	nanopore uranium goethite sorption alumina transport subsurface redox reaction iron oxides iron hydroxides goethite ferrihydrite
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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/6359
专题	地球科学
推荐引用方式 GB/T 7714	Xu, Huifang,Roden, Eric E.,Kemner, Kenneth M.,et al. The role of nanopores on U(VI) sorption and redox behavior in U(VI)-contaminated subsurface sediments,2013.