Evaluation of extraction chromatography for americium recovery

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Extraction, or reverse-phase partition chromatography, as used mostly for analytical separations, employs an organic solvent extractant as a stationary phase on an inert support material. This technique, which has the advantage of utilizing the versatility of solvent extraction systems with the less expensive operation of ion exchange equipment, was evaluated for a process to recover low level concentrations of americium from acidic process waste streams at Rocky Flats. The bidentate organophosphorous extractant DHDECMP (dihexyl-N, N-diethylcarbamylmethylene phosphonate) was used as the stationary phase since it was shown to effectively scavenge americium from acidic waste streams without significantly extracting impurity ions. Over ... continued below

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Pages: 11

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Alford, C. E. & Navratil, J. D. March 23, 1977.

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Description

Extraction, or reverse-phase partition chromatography, as used mostly for analytical separations, employs an organic solvent extractant as a stationary phase on an inert support material. This technique, which has the advantage of utilizing the versatility of solvent extraction systems with the less expensive operation of ion exchange equipment, was evaluated for a process to recover low level concentrations of americium from acidic process waste streams at Rocky Flats. The bidentate organophosphorous extractant DHDECMP (dihexyl-N, N-diethylcarbamylmethylene phosphonate) was used as the stationary phase since it was shown to effectively scavenge americium from acidic waste streams without significantly extracting impurity ions. Over 30 support materials were evaluated for DHDECMP capacity and for their ability to retain the extractant. Of the supports tested, the Amberlite XAD macroreticular sorbents were found to have the highest DHDECMP capacity. Amberlite XAD-4 beads retained the extractant significantly better than the other supports evaluated. Thus, this solvent was tested for americium breakthrough capacity and compared to the theoretical capacity.

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Pages: 11

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Dep. NTIS, PC A02/MF A01.

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  • Report No.: RFP-2625
  • Grant Number: EY-76-C-04-3533
  • DOI: 10.2172/5235433 | External Link
  • Office of Scientific & Technical Information Report Number: 5235433
  • Archival Resource Key: ark:/67531/metadc1068183

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • March 23, 1977

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

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  • March 20, 2018, 1:02 p.m.

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Alford, C. E. & Navratil, J. D. Evaluation of extraction chromatography for americium recovery, report, March 23, 1977; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc1068183/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.