Influence of acidic and alkaline waste solution properties on uranium migration in subsurface sediments

This study shows that acidic and alkaline wastes co-disposed with uranium into subsurface sediments have significant impact on changes in uranium retardation, concentration, and mass during downward migration. For uranium co-disposal with acidic wastes, significant rapid (i.e., hours) carbonate and...

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Veröffentlicht in:	Journal of Contaminant Hydrology, 151:155-175 151:155-175, 2013-08, Vol.151, p.155-175
Hauptverfasser:	Szecsody, Jim E., Truex, Mike J., Qafoku, Nikolla P., Wellman, Dawn M., Resch, Tom, Zhong, Lirong
Format:	Artikel
Sprache:	eng
Schlagworte:	acid waste Acidic waste Adsorption Alkaline waste Earth sciences Earth, ocean, space Exact sciences and technology Geologic Sediments - chemistry Hydrogen-Ion Concentration Hydrogeology Hydrology. Hydrogeology Minerals - chemistry Radioactive Waste Solubility Subsurface contamination Uranium Uranium - chemistry Uranium adsorption Uranium dissolution/precipitation Water Movements Water Pollutants, Radioactive - chemistry
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Zusammenfassung:	This study shows that acidic and alkaline wastes co-disposed with uranium into subsurface sediments have significant impact on changes in uranium retardation, concentration, and mass during downward migration. For uranium co-disposal with acidic wastes, significant rapid (i.e., hours) carbonate and slow (i.e., 100s of hours) clay dissolution resulted, releasing significant sediment-associated uranium, but the extent of uranium release and mobility change was controlled by the acid mass added relative to the sediment proton adsorption capacity. Mineral dissolution in acidic solutions (pH2) resulted in a rapid (
ISSN:	0169-7722 1873-6009
DOI:	10.1016/j.jconhyd.2013.05.009