Rate of uranium adsorption on hydrous titanium (IV) oxide granulated with poly acrylic hydrazide.

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概要

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• Three kinds of granulated hydrous titanium oxides (HTiOs) with different particle size (100120, 4260 and 3235 mesh size) were prepared by using poly acrylic hydrazide (PAH) as a binder. Rates of U adsorption on native HTiO powder and the granulated HTiOs were measured from U-enriched sea water by batchwise method. The intraparticle diffusivity (D<SUB>p</SUB>) of U was evaluated by using the model of pore.diffusion with Freundlich-type adsorption isotherm. The estimated diffusivity (D<SUB>p</SUB>) was 1.07 × 10<SUP>-6</SUP> cm<SUP>2</SUP>/s for the HTiO powder. Its tortuosity factor calculated by parallel plate pore model was 1.6.<BR>Although the granulated HTiOs had macropores around 2, 000 nm in radius in addition to the mesopores originated from HTiO powder, they showed smaller D<SUB>p</SUB> values (3.0 × 10<SUP>-7</SUP>8.6 × 10<SUP>-7</SUP> cm<SUP>2</SUP>/s) than the native HTiO. The smaller D<SUB>p</SUB> values of the granulated HTiOs may be due to the influence of the PAH which adheres on the HTiO particles.

• 一般社団法人 日本原子力学会の論文

著者

• OOI Kenta

  Shikoku Government Industrial Research Institute

• ASHIDA Keiji

  Nuclear Energy Department, Sumitomo Chemical Co., Ltd.

• KATOH Shunsaku

  Shikoku Government Industrial Research Institute

• SUGASAKA Kazuhiko

  Shikoku Government Industrial Research Institute

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• Rate of uranium adsorption on hydrous titanium (IV) oxide granulated with poly acrylic hydrazide.

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