| DOI: | 10.2172/1096552
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| 报告号: | DOE-UW-02150
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| 报告题名: | The role of nanopores on U(VI) sorption and redox behavior in U(VI)-contaminated subsurface sediments |
| 作者: | Xu, Huifang; Roden, Eric E.; Kemner, Kenneth M.; Jung, Hun-Bok; Konishi, Hiromi; Boyanov, Maxim; Sun, Yubing; Mishra, Bhoopesh
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| 出版年: | 2013
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| 发表日期: | 2013-10-16
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| 总页数: | 521K
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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: | nanopore
; uranium
; goethite
; sorption
; alumina
; transport
; subsurface
; redox reaction
; iron oxides
; iron hydroxides
; goethite
; ferrihydrite
|
| 中文主题词: | 沉积物
; 铁
; 矿物
|
| 主题词: | SEDIMENTS
; IRON
; MINERALS
|
| 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. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1096552
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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/40947
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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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| 1096552.pdf（520KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
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. 2013-01-01.
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