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The effect of calcium on aqueous uranium(VI) speciation and adsorption to ferrihydrite and quartz

Dates

Year
2006

Citation

Fox, Patricia M, Davis, James A, and Zachara, John M, 2006, The effect of calcium on aqueous uranium(VI) speciation and adsorption to ferrihydrite and quartz: Geochimica et Cosmochimica Acta, v. 70, iss. 6, p. 1379-1387.

Summary

Recent studies of uranium(VI) geochemistry have focused on the potentially important role of the aqueous species, CaUO2(CO3)32− and Ca2UO2(CO3)30(aq), on inhibition of microbial reduction and uranium(VI) aqueous speciation in contaminated groundwater. However, to our knowledge, there have been no direct studies of the effects of these species on U(VI) adsorption by mineral phases. The sorption of U(VI) on quartz and ferrihydrite was investigated in NaNO3 solutions equilibrated with either ambient air (430 ppm CO2) or 2% CO2 in the presence of 0, 1.8, or 8.9 mM Ca2+. Under conditions where the Ca2UO2(CO3)30(aq) species predominates U(VI) aqueous speciation, the presence of Ca in solution lowered U(VI) adsorption on quartz from 77% in [...]

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  • USGS National Research Program

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Added to ScienceBase on Fri Apr 19 12:07:05 MDT 2013 by processing file <b>Partitioning of Solutes between Solid and Aqueous Phases.xml</b> in item <a href="https://www.sciencebase.gov/catalog/item/511182cfe4b03611765639eb">https://www.sciencebase.gov/catalog/item/511182cfe4b03611765639eb</a>

Additional Information

Identifiers

Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.1016/j.gca.2005.11.027

Citation Extension

journalGeochimica et Cosmochimica Acta
parts
typePages
value1379-1387
typeVolume
value70
typeIssue
value6
citationTypeJournal Article

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