Application of supported liquid membranes for removal of uranium from groundwater

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5518767

Chiarizia, R; Horwitz, E P; Rickert, P G; Hodgson, K M ^[1]

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1. Argonne National Lab., IL (USA)

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.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5518767
• Report Number(s): CONF-891013-4; ON: DE90001941
• Country of Publication: United States
• Language: English

Related Subjects

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520300* -- Environment
Aquatic-- Radioactive Materials Monitoring & Transport-- (1989)
54 ENVIRONMENTAL SCIENCES
ACTINIDES
ALKALINE EARTH METALS
CALCIUM
ELEMENTS
EXTRACTION
FIBERS
GROUND WATER
HANFORD RESERVATION
HYDROGEN COMPOUNDS
MAGNESIUM
MEMBRANES
METALS
NATIONAL ORGANIZATIONS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PERMEABILITY
PHOSPHINIC ACIDS
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
STABILITY
TESTING
URANIUM
US DOE
US ERDA
US ORGANIZATIONS
WATER