Electrokinetic removal of uranium from contaminated, unsaturated soils

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Description

Electrokinetic remediation of uranium-contaminated soil was studied in a series of laboratory-scale experiments in test cells with identical geometry using quartz sand at approximately 10 percent moisture content. Uranium, when present in the soil system as an anionic complex, could be migrated through unsaturated soil using electrokinetics. The distance that the uranium migrated in the test cell was dependent upon the initial molar ratio of citrate to uranium used. Over 50 percent of the uranium was recovered from the test cells using the citrate and carbonate complexing agents over of period of 15 days. Soil analyses showed that the uranium ... continued below

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54 p.

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Booher, W.F.; Lindgren, E.R. & Brady, P.V. January 1, 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Electrokinetic remediation of uranium-contaminated soil was studied in a series of laboratory-scale experiments in test cells with identical geometry using quartz sand at approximately 10 percent moisture content. Uranium, when present in the soil system as an anionic complex, could be migrated through unsaturated soil using electrokinetics. The distance that the uranium migrated in the test cell was dependent upon the initial molar ratio of citrate to uranium used. Over 50 percent of the uranium was recovered from the test cells using the citrate and carbonate complexing agents over of period of 15 days. Soil analyses showed that the uranium remaining in the test cells had been mobilized and ultimately would have been extracted. Uranium extraction exceeded 90 percent in an experiment that was operated for 37 days. Over 70 percent of the uranium was removed from a Hanford waste sample over a 55 day operating period. Citrate and carbonate ligand utilization ratios required for removing 50 percent of the uranium from the uranium-contaminated sand systems were approximately 230 moles ligand per mole uranium and 1320 moles ligand per mole uranium for the waste. Modifying the operating conditions to increasing the residence time of the complexants is expected to improved the utilization efficiency of the complexing agent.

Physical Description

54 p.

Notes

INIS; OSTI as DE97002707

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  • Other Information: PBD: Jan 1997

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  • Other: DE97002707
  • Report No.: SAND--97-0122
  • Grant Number: AC04-94AL85000
  • DOI: 10.2172/434445 | External Link
  • Office of Scientific & Technical Information Report Number: 434445
  • Archival Resource Key: ark:/67531/metadc675314

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Creation Date

  • January 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • June 10, 2016, 9:07 p.m.

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Booher, W.F.; Lindgren, E.R. & Brady, P.V. Electrokinetic removal of uranium from contaminated, unsaturated soils, report, January 1, 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc675314/: accessed June 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.