The Biogeochemistry of Pu and U: Distribution of Radionuclides Affected by Micro-Organisms and Their Siderophores, Reductants, and Exopolymers

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Investigations to date focused on studying the dissolution of oxides and desorption of metals by the siderophore, Desferrioxamine B (DFB), with different metal ions adsorbed onto the solids. X-ray absorption spectroscopy (XAS) was used to probe the surface structural environment of sorbed metal ions. Results indicated that while DFB effectively dissolved iron oxides with different adsorbed metals, this process was also affected by the type of the metal adsorbed. For pure hematite, samples with adsorbed metals had less dissolved Fe by DFB than the one without. Different type of metal ion seemed to have no significant effects on Fe dissolution ... continued below

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Traina, Samuel J. June 1, 2003.

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Description

Investigations to date focused on studying the dissolution of oxides and desorption of metals by the siderophore, Desferrioxamine B (DFB), with different metal ions adsorbed onto the solids. X-ray absorption spectroscopy (XAS) was used to probe the surface structural environment of sorbed metal ions. Results indicated that while DFB effectively dissolved iron oxides with different adsorbed metals, this process was also affected by the type of the metal adsorbed. For pure hematite, samples with adsorbed metals had less dissolved Fe by DFB than the one without. Different type of metal ion seemed to have no significant effects on Fe dissolution under these experimental conditions. This result suggested that while adsorbed metals blocked available surface sites on hematite surfaces for DFB causing less Fe release, Fe dissolution by DFB from the well crystalline structure of hematite was not affected by the adsorbed metal ions.

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  • Report No.: NABIR-1022970-2003
  • Grant Number: None
  • DOI: 10.2172/893785 | External Link
  • Office of Scientific & Technical Information Report Number: 893785
  • Archival Resource Key: ark:/67531/metadc888875

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  • June 1, 2003

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 5:46 p.m.

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Traina, Samuel J. The Biogeochemistry of Pu and U: Distribution of Radionuclides Affected by Micro-Organisms and Their Siderophores, Reductants, and Exopolymers, report, June 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc888875/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.