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Title: Membrane based U(VI) transport across supported liquid membrane from aqueous acidic media
Authors: Sawant, S R
Sonawane, J V
Venugopalan, A K
Dey, P K
Kumar, Anil
Mathur, J N
Issue Date: Sep-2003
Publisher: NISCAIR-CSIR, India
Abstract: Carrier-facilitated transport of U(VI) from dilute acidic nitrate solutions has been examined across a flat sheet supported liquid membrane (FSSLM) and hollow fiber supported liquid membrane (HFSLM) deploying Cyanex 272 (Cy 272) as the novel carrier. Using FSSLM system, the apparent rate constant (Kobs) increased with increasing carrier concentration and became nearly constant above 0.2 M Cy 272, thereafter decreased slightly at 0.4 M Cy 272. Accurel polypropylene thin film support coded as 2E-PP and dodecane as the membrane solvent were invariably used. Among the several reagents tested, oxalic acid (0.9 M) served as the most efficient strippant for U(VI) across Cy 272-FSSLM as well as HFSLM systems. Application of this simple method has been extended for the removal of uranium from phosphate waste, which is generated in analytical laboratory of fuel reprocessing plant. In addition, transport of uranium was accomplished in presence of plutonium, americium and fission product contaminants from aqueous acidic media.
Page(s): 531-538
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.10(5) [September 2003]

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