Application of supported liquid membranes for removal of uranium from groundwater

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The separation of uranium from Hanford site groundwater as studied by hollow-fiber supported liquid membranes, SLM. The carrier bis(2,4,4-trimethylpentyl)phosphinic acid, H(DTMPep), contained in the commercial extractant Cyanex{trademark} 272 was used as a membrane carrier, because of its selectivity for U over calcium and magnesium. The water soluble complexing agent, 1-hydroxyethane-1,1-diphosphonic acid, HEDPA, was used as stripping agent. Polypropylene hollow-fibers and n-dodecane were used as polymeric support and diluent, respectively. Laboratory scale hollow-fiber modules were employed in a recycling mode, using as feed synthetic groundwater at pH 2, to confirm the capability of the proposed SLM system to separate and concentrate ... continued below

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Pages: (27 p)

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Chiarizia, R.; Horwitz, E.P.; Rickert, P.G.; Hodgson, K.M. (Argonne National Lab., IL (USA) & Westinghouse Hanford Co., Richland, WA (USA)) January 1, 1989.

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The separation of uranium from Hanford site groundwater as studied by hollow-fiber supported liquid membranes, SLM. The carrier bis(2,4,4-trimethylpentyl)phosphinic acid, H(DTMPep), contained in the commercial extractant Cyanex{trademark} 272 was used as a membrane carrier, because of its selectivity for U over calcium and magnesium. The water soluble complexing agent, 1-hydroxyethane-1,1-diphosphonic acid, HEDPA, was used as stripping agent. Polypropylene hollow-fibers and n-dodecane were used as polymeric support and diluent, respectively. Laboratory scale hollow-fiber modules were employed in a recycling mode, using as feed synthetic groundwater at pH 2, to confirm the capability of the proposed SLM system to separate and concentrate U(VI) in the strip solution. Information was obtained on the U(VI) concentration factor and on the long-term performance of the SLMs. Encouraging results were obtained both with a conventional module and with a module containing a carrier solution reservoir. Industrial scale modules were used at Hanford to test the SLM separation of U(VI) from real contaminated groundwater. The uranium concentration was reduced from approximately 3500 ppB to about 1 ppB in a few hours. 9 refs., 8 figs., 4 tabs.

Physical Description

Pages: (27 p)

Notes

NTIS, PC A03/MF A01; OSTI; INIS; GPO Dep.

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  • 6. symposium on separation science and technology for energy applications, Knoxville, TN (USA), 22-27 Oct 1989

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  • Other: DE90001941
  • Report No.: CONF-891013-4
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5518767
  • Archival Resource Key: ark:/67531/metadc1093916

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  • January 1, 1989

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  • Feb. 10, 2018, 10:06 p.m.

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  • April 25, 2018, 12:18 p.m.

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Chiarizia, R.; Horwitz, E.P.; Rickert, P.G.; Hodgson, K.M. (Argonne National Lab., IL (USA) & Westinghouse Hanford Co., Richland, WA (USA)). Application of supported liquid membranes for removal of uranium from groundwater, article, January 1, 1989; Illinois. (digital.library.unt.edu/ark:/67531/metadc1093916/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.