イオン交膜面付着物層内における濃度分極 Concentration Polarization in the Substance Layer Attached to an Ion Exchange Membrane

この論文にアクセスする

この論文をさがす

著者

抄録

In order to prevent fouling of ion exchange membranes, the ionic transport and concentration polarization in the substance layer attached to the membrane surface was analyzed in an NaCl solution using the extended Nernst-Planck equation. The ionic diffusion coefficient in a non-infinitely diluted region withn the layer was obtained ushlg the diffusion coefficient equation taken from the Nernst-Einstein equation, and the same coefficient in an infinitely diluted region was expressed using the values in the infinitely diuted region. When the NaCl concentration in the substance layer is increased in the non-infinitely diluted region, the ionic concentration change is expressed linearly. This is because the effbct of convection on the ionic transport is neghgible. When the NaCl concentration is reduced in the non-infinitely diluted region, the ionic concentration is expressed by a curved line and the concentration polarization is moderated to some extent. This is because of the increase in the ionic diffusion codfficient in the low NaCl concentration. In the infinitely diluted region, the ionic diffhsion coefficient being co nstant, the concentration polarization is promoted by the sharp linear decrease of the NaCl concentration neaf the membrane surface. Accordingly, the possibility of trouble occurrhlg, such as water dissociation, increases as a result of the formation of the infinitely diluted region. The concentration polarization is promoted in the substance Iayer because the convection is less and the effect of the 3rd term (convection term) in the extended Nernst-Planck equation decreases. The convection in the layeroccur only as a result of the electro-osmotic flow and convection diffbrence osmotic flow in the membranes. It is important to remove the substance layer attached to the membrane surface in the electrodialysis, because of the cel voltage increase Qwing to the promotion of concentration polarization.

収録刊行物

  • 日本海水学会誌

    日本海水学会誌 51(4), 228-236, 1997-09-01

    日本海水学会

参考文献:  18件中 1-18件 を表示

  • <no title>

    SOLT G. S.

    Trans. Instn. Chem. Engrs. 41, 365, 1963

    被引用文献1件

  • <no title>

    SOLT G. S.

    Desalination 2, 21, 1967

    被引用文献1件

  • <no title>

    WILSON J. R.

    Deminerallization by Electrodialysis, 1960

    被引用文献1件

  • <no title>

    ROSENBERG N. W.

    Ind. Eng. Chem. 49, 780, 1957

    被引用文献2件

  • <no title>

    COWAN D. A.

    Ind. Eng. Chem. 51, 1445, 1959

    被引用文献2件

  • <no title>

    PATEL R. D.

    Ind. Eng. Chem. 16, 340, 1977

    被引用文献1件

  • <no title>

    TANAKA Y.

    J. Membrane Sci. 57, 217, 1991

    被引用文献1件

  • <no title>

    畦地昭二

    日本専売公社小田原製塩試験場報告 9, 18, 1964

    被引用文献1件

  • <no title>

    日本化学会

    化学便覧基礎編 2-447, 2-455, 1993

    被引用文献1件

  • <no title>

    大和田紘一

    海水誌 34, 367, 1981

    被引用文献1件

  • <no title>

    田中良修

    日本イオン交換学会誌 8, 14, 1997

    被引用文献1件

  • <no title>

    TANAKA Y.

    J. Membrane Sci. 92, 217, 1994

    被引用文献1件

  • <no title>

    KRESSMAN T. R. S.

    Electrochemical Science 116, 25, 1969

    DOI 被引用文献1件

  • <no title>

    KORNGOLD E.

    Desalination 8, 195, 1970

    DOI 被引用文献1件

  • <no title>

    GROSSMAN G.

    Desalination 10, 157, 1972

    DOI 被引用文献1件

  • <no title>

    GROSSMAN G.

    Desalination 12, 107, 1973

    DOI 被引用文献2件

  • <no title>

    COOKE B. A.

    Electrochimica Acta 3, 307, 1961

    DOI 被引用文献1件

  • <no title>

    RUBINSTEIN I.

    JCS Faraday Trans II 75, 231, 1979

    DOI 被引用文献1件

被引用文献:  1件中 1-1件 を表示

各種コード

  • NII論文ID(NAID)
    10008280993
  • NII書誌ID(NCID)
    AN0018645X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03694550
  • NDL 記事登録ID
    4292551
  • NDL 雑誌分類
    ZM44(科学技術--地球科学--海洋・陸水・火山) // ZP8(科学技術--化学・化学工業--無機化学・無機化学工業)
  • NDL 請求記号
    Z15-47
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ