Abstract
In order to investigate the optimum condition for anion-exchange chromatography for purification and recovery of actinide(IV) constituting transuranium elements, a convective-diffusion equation model treating mass balance and Langmuir-type kinetics in porous system, which was developed for thorium(IV) by us, was applied to neptunium(IV). Absorption isotherm of neptunium(IV) to anion-exchange (MSA-1) resin was carried out by using 237+239Np in 6N HNO3 media and hereby parameters of the Langmuir-type kinetics were determined as k0 = 2.5 × 103 and smax = 1.0. Accompanied with the fluid dynamics parameters already determined for the column system used for 227+232Th, elution curves of neptunium(IV) at highly loaded condition were estimated by the numerical calculation. According to the result, the loading of more than 10% of resin capacity leads to rapid breakthrough and severe tailing of neptunium which lowers purity and yield in the purification procedure. This numerical calculation will serve as a valuable measure to figure out column operation conditions for purification and recovery of transuranium elements.
Original language | English |
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Pages (from-to) | 647-651 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 444-445 |
Issue number | SPEC. ISS. |
DOIs | |
Publication status | Published - 2007 Nov 1 |
Keywords
- Elusion curve
- Fluid dynamic simulation
- Highly loaded condition
- Neptunium
- Preparatory chromatography
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry