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

doi:10.2172/1052233

GSTDTAP > 地球科学

DOI	10.2172/1052233
报告编号	FINAL REPORT
来源ID	OSTI ID: 1052233
	Final Project Report: Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport
	Jon Chorover, University of Arizona; Peggy O'ĂÂĂÂĂÂĂÂDay, University of California, Merced; Karl Mueller, Penn State University; Wooyong Um, Pacific Northwest National Laboratory; Carl Steefel, Lawrence Berkeley National Laboratory
	2012-10-01
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 detailed characterization of reaction products over a matrix of field-relevant gradients in contaminant concentration, PCO2, 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.
英文关键词	Hanford sediment weathering caustic waste strontium cesium speciation reactive 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/5677
专题	地球科学
推荐引用方式 GB/T 7714	Jon Chorover, University of Arizona,Peggy O'ĂÂĂÂĂÂĂÂDay, University of California, Merced,Karl Mueller, Penn State University,et al. Final Project Report: Release of aged contaminants from weathered sediments: Effects of sorbate speciation on scaling of reactive transport,2012.