TITLE:
Hollow Fiber Supported Liquid Membrane for Separation and Recovery of 152+154Eu and 90Sr from Aqueous Acidic Wastes
AUTHORS:
A. T. Kassem, Y. T. Selim, N. El-Said
KEYWORDS:
Hollow Fiber Supported Liquid Membrane, Separation and Recovery, 152+154Eu and 90Sr, EDTA (Stripping Phase)
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.6 No.7,
June
30,
2015
ABSTRACT: Separation
and recovery of 152+154Eu and 90Sr from radioactive waste
using tracer concentration from active material from waste tank in the ET-RR1
Egypt via hollow fiber supported liquid membrane (HFSLM) were achieved. The
Polypropylene was used as supporter to carrier 0.5M Cyanex301/kerosene
(bis(2,4,4-trimethylpentyl)dithiophosphinic acid and 0.1MEDTA as stripping of 152+154Eu
and 90Sr ions from nitrate medium at pH ~3.6. The separation factor
was found to be ~4 for 152+154Eu over 90Sr. The
aqueous feed of mass transfer coefficient (ki) and the organic mass
transfer coefficient (km) were calculated to be (1.52 and 4.5) × 10﹣2cm/s, respectively. In addition,
the mass transfer modeling was performed and the validity of the developed
model from experimental data was found to join in well with the theoretical
values when the Cyanex301 concentration is higher than 1% (v/v). The number of
cycles evaluated for complete separation of 152+154Eu and 90Sr
is five cycles.