The effect of operating conditions on hydraulic permeability and diffusion coefficient in the membrane for reverse osmosis separation of aqueous inorganic salts solutions.

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  • OHYA Haruhiko
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.
  • NIWA Masahiro
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.
  • HARA Tatsuya
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.
  • HINO Takeshi
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.
  • NEGISHI Youichi
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.
  • MATSUMOTO Kanji
    Dept. Material Science and Chemical Engineering, Yokohama Natl. Univ.

Bibliographic Information

Other Title
  • 無機塩類水溶液の逆浸透分離実験における溶液透過係数および膜内拡散係数の操作条件による変化
  • ムキ エンルイ スイヨウエキ ノ ギャクシントウ ブンリ ジッケン ニ オケル

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Abstract

Reverse osmosis separation of aqueous NaCl, MgCl2, Na2SO4 and MgSO4 solutions were carried out using CA membranes and 3 composite membranes. Membrane constants were calculated by the Spiegler-Kedem's transport model. Hydraulic permeability decreases with increase of concentration of solute in feed, only depends upon osmotic pressure on the surface of the membrane but not upon salt spiecies. Distribution coefficient of salt to CA measured separately was dependent upon concentration of salt in feed and salt spiecies. Diffusion coefficient of each salt in CA (90) membrane calculated decreases with osmotic pressure on the surface of the membrane up to 1 MPa but almost are constant beyond that pressure.

Journal

  • MEMBRANE

    MEMBRANE 14 (2), 131-138, 1989

    THE MEMBRANE SOCIETY OF JAPAN

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