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Surface complexation model of uranyl sorption on Georgia kaolinite

Dates

Year
2004

Citation

Payne, T E, Davis, J A, Lumpkin, G R, Chisari, R, and Waite, T D, 2004, Surface complexation model of uranyl sorption on Georgia kaolinite: Applied Clay Science, v. 26, iss. 1–4, p. 151-162.

Summary

The adsorption of uranyl on standard Georgia kaolinites (KGa-1 and KGa-1B) was studied as a function of pH (3–10), total U (1 and 10 μmol/l), and mass loading of clay (4 and 40 g/l). The uptake of uranyl in air-equilibrated systems increased with pH and reached a maximum in the near-neutral pH range. At higher pH values, the sorption decreased due to the presence of aqueous uranyl carbonate complexes. One kaolinite sample was examined after the uranyl uptake experiments by transmission electron microscopy (TEM), using energy dispersive X-ray spectroscopy (EDS) to determine the U content. It was found that uranium was preferentially adsorbed by Ti-rich impurity phases (predominantly anatase), which are present in the kaolinite samples. [...]

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Attached Files

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  • USGS National Research Program

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Provenance

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.clay.2003.08.013

Citation Extension

citationTypeJournal Article
journalApplied Clay Science
parts
typePages
value151-162
typeVolume
value26
typeIssue
value1–4

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