Fluid dynamics simulation of highly loaded anion-exchange chromatography of Np(IV) based on adsorption isotherm determined by 237+239Np

Tomoo Yamamura, T. Mitsugashira, Y. Shiokawa, Dai Aoki, Yoshiya Homma

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)647-651
ページ数5
ジャーナルJournal of Alloys and Compounds
444-445
SPEC. ISS.
DOI
出版ステータスPublished - 2007 11 1

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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