Transport of Mo(VI) ions through tri-n-octylamine-xylene based supported liquid membranes

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Separation Science and Technology; (USA)

DOI:https://doi.org/10.1080/01496399008050332· OSTI ID:6171149

Chaudry, M A; Malik, M T; Ali, A ^[1]

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1. Pakistan Institute of Nuclear Science and Technology, Islamabad (Pakistan)

The study of Mo(VI) ions transport through tri-n-octylamine (TOA)-xylene liquid membranes supported in polypropylene hydrophobic microporous film has been performed with varying concentrations of HC1, TOA, and NaOH in the feed membrane, strip solution, and temperature. The flux of metal ions increases with an increase in temperature. Decomposition of (Mo{sub 7}O{sub 24}){sup 6{minus}} ions into lower species appears to occur, and a pH decrease in the feed with the passage of time during transport of these metal ions is an indication of this effect. Mixed polymetal anions appear to be responsible for complexing with TOA molecules and the transport through the membrane. The transport mechanism of this metal ion through the membrane is based on the association of metal anions with protonated tri-n-octylamine (TOA) molecules on the feed-side interface, diffusion through the membrane, decomposition of the complex on the strip/solution-side membrane interface in alkaline conditions, and backdiffusion of TOA molecules.

• OSTI ID: 6171149
• Journal Information: Separation Science and Technology; (USA), Journal Name: Separation Science and Technology; (USA) Vol. 25:3; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ALKYLATED AROMATICS
AROMATICS
CHARGED PARTICLES
DATA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
IONS
MEASURING METHODS
MEMBRANES
MOLYBDENUM IONS
NUMERICAL DATA
ORGANIC COMPOUNDS
PH VALUE
SEPARATION PROCESSES
SUPPORTED LIQUID MEMBRANES
XYLENES