Spectroscopic studies of U(VI) sorption at the kaolinite-water interface. Final report

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Efficient use of U as a resource and safe handling, recycling and disposal of U-containing wastes require an understanding of the factors controlling the fate of U, where fate refers to the destination of U, typically expressed as an environmental medium or a process phase. The sorption process constitutes a change in elemental fate. Partitioning of an element from solution to a solid phase, or sorption, can be divided into three broad categories: adsorption, surface precipitation, and absorption. Extended X-ray absorption fine structure (EXAFS), a type of X-ray absorption spectroscopy (XAS), offers the possibility for distinguishing among different modes of ... continued below

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125 p.

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Thompson, H.A.; Parks, G.A. & Brown, G.E. Jr. June 1, 1994.

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Description

Efficient use of U as a resource and safe handling, recycling and disposal of U-containing wastes require an understanding of the factors controlling the fate of U, where fate refers to the destination of U, typically expressed as an environmental medium or a process phase. The sorption process constitutes a change in elemental fate. Partitioning of an element from solution to a solid phase, or sorption, can be divided into three broad categories: adsorption, surface precipitation, and absorption. Extended X-ray absorption fine structure (EXAFS), a type of X-ray absorption spectroscopy (XAS), offers the possibility for distinguishing among different modes of sorption by characterizing the atomic environment of the sorbing element. In this study, the authors use EXAFS to determine the structure of U(VI) sorption complexes at the kaolinite-water interface. In Chapter One, they present an overview of selected aspects of U structural chemistry as a basis for considering the structural environment of U at the solid-water interface. To evaluate the utility of XAS for characterization of the structural environment of U(VI) at the solid-water interface, they have carried out an in-depth analysis of XAS data from U(VI)-containing solid and solution model compounds, which they describe in Chapter Two. In Chapter three, they consider sorption of U by kaolinite as a means of effecting the removal of U from surface collection pond waters on the Rocky Flats Plant site in northern Colorado.

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125 p.

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INIS; OSTI as DE96000862

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  • Other Information: PBD: 1 Jun 1994

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  • Other: DE96000862
  • Report No.: LA-SUB--95-177
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/113877 | External Link
  • Office of Scientific & Technical Information Report Number: 113877
  • Archival Resource Key: ark:/67531/metadc628430

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • June 1, 1994

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 29, 2016, 7:38 p.m.

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Thompson, H.A.; Parks, G.A. & Brown, G.E. Jr. Spectroscopic studies of U(VI) sorption at the kaolinite-water interface. Final report, report, June 1, 1994; New Mexico. (digital.library.unt.edu/ark:/67531/metadc628430/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.