Chemical Speciation of Inorganic Compounds under Hydrothermal Conditions

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By employing XAFS spectroscopy we are seeking a better understanding of the high temperature aqueous chemistry and speciation of those components that are troublesome to the treatment of the Hanford tank wastes: namely Cr, Re (surrogate for Tc), Fe, Ru (surrogate for Pu), and NO3 -/NO2 -. After initial experiments revealed that the high corrosivity of some of these aqueous systems renders the original high-pressure/high-temperature XAFS flow cell unsuitable of these systems, we have quickly implemented a new XAFS flow cell design made from Pt/Ir alloy. Over the last 12 months we have been able to obtain a number of ... continued below

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Stern, Edward A.; Fulton, John L. & Seidler, Gerald June 1, 1999.

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Description

By employing XAFS spectroscopy we are seeking a better understanding of the high temperature aqueous chemistry and speciation of those components that are troublesome to the treatment of the Hanford tank wastes: namely Cr, Re (surrogate for Tc), Fe, Ru (surrogate for Pu), and NO3 -/NO2 -. After initial experiments revealed that the high corrosivity of some of these aqueous systems renders the original high-pressure/high-temperature XAFS flow cell unsuitable of these systems, we have quickly implemented a new XAFS flow cell design made from Pt/Ir alloy. Over the last 12 months we have been able to obtain a number of groundbreaking results with this new XAFS cell, which we will briefly highlight.

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  • Other Information: PBD: 1 Jun 1999

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  • Report No.: EMSP-60050--1999
  • Grant Number: GF07-97ER14818
  • DOI: 10.2172/828506 | External Link
  • Office of Scientific & Technical Information Report Number: 828506
  • Archival Resource Key: ark:/67531/metadc777470

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  • June 1, 1999

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 21, 2016, 4:48 p.m.

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Stern, Edward A.; Fulton, John L. & Seidler, Gerald. Chemical Speciation of Inorganic Compounds under Hydrothermal Conditions, report, June 1, 1999; United States. (digital.library.unt.edu/ark:/67531/metadc777470/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.