Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport

doi:10.2172/1054161

GSTDTAP > 地球科学

DOI	10.2172/1054161
报告编号	DOE/ER/64615
来源ID	OSTI ID: 1054161
	Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport
	Chorover, Jon; Perdrial, Nico; Mueller, Karl; Strepka, Caleb; OĂÂĂÂĂÂĂÂ˘ĂÂĂÂĂÂĂÂĂÂĂÂĂÂĂÂDay, Peggy; Rivera, Nelson; Um, Wooyong; Chang, Hyun-Shik; Steefel, Carl; Thompson, Aaron
	2012-11-05
出版年	2012
语种	英语
国家	美国
领域	地球科学
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.
英文关键词	contamination remediation speciation transport
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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/5857
专题	地球科学
推荐引用方式 GB/T 7714	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.