| DOI: | 10.2172/1054161
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| 报告号: | DOE/ER/64615
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| 报告题名: | Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport |
| 作者: | Chorover, Jon; Perdrial, Nico; Mueller, Karl; Strepka, Caleb; OĂÂĂÂĂÂĂ¢ĂÂĂÂĂÂĂÂĂÂĂÂĂÂĂÂDay, Peggy; Rivera, Nelson; Um, Wooyong; Chang, Hyun-Shik; Steefel, Carl; Thompson, Aaron
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| 出版年: | 2012
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| 发表日期: | 2012-11-05
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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: | contamination
; remediation
; speciation
; transport
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| 中文主题词: | 碳
; 沉积物
; 风化作用
; 硅酸盐
; 污染物
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| 主题词: | CARBON
; SEDIMENTS
; WEATHERING
; SILICATE
; CONTAMINANTS
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| 英文摘要: | Hanford sediments impacted by hyperalkaline high level radioactive waste have undergone incongruent silicate mineral weathering concurrent with contaminant uptake. In this project, we studied the impact of background pore water (BPW) on strontium, cesium and iodine desorption and transport in Hanford sediments that were experimentally weathered by contact with simulated hyperalkaline tank waste leachate (STWL) solutions. Using those lab-weathered Hanford sediments (HS) and model precipitates formed during nucleation from homogeneous STWL solutions (HN), we (i) provided thorough characterization of reaction products over a matrix of field-relevant gradients in contaminant concentration, partial pressure of carbon dioxide, and reaction time; (ii) improved molecular-scale understanding of how sorbate speciation controls contaminant desorption from weathered sediments upon removal of caustic sources; and (iii) developed a mechanistic, predictive model of meso- to field-scale contaminant reactive transport under these conditions. In this final report, we provide detailed descriptions of our results from this three-year study, completed in 2012 following a one-year no cost extension. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1054161
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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/40475
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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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| 1054161.pdf（2518KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Chorover, Jon,Perdrial, Nico,Mueller, Karl,et al. Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport. 2012-01-01.
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