Ion adsorption on variable charge materials and thermodynamics of ion exchange

Shin Ichiro Wada, Kouya Kawabata, Kouya Kawabata

研究成果: ジャーナルへの寄稿記事

10 引用 (Scopus)

抄録

Some of the problems associated with the application of the existing thermodynamics of ion exchange for the description of ion adsorption on variable charge soils are discussed. A major problem is the difficulty in saturating the surface functional groups of variable charge materials with ions other than H+ or OH, i.e., the difficulty in obtaining complete exchange isotherms. It was shown that this difficulty could be overcome by choosing appropreate standard states of exchanger phase components. A set of equations that relate the exchanger phase activity coefficients and thermodynamic equilibrium constant to the selectivity coefficient were derived based on a nonconventional asymmetric reference system. The terms related to adsorbed water activity that appear in the derived equations were found to be non-significant for some variable charge materials.

元の言語英語
ページ(範囲)191-200
ページ数10
ジャーナルSoil Science and Plant Nutrition
37
発行部数2
DOI
出版物ステータス出版済み - 6 1991

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variable charge
ion exchange
thermodynamics
adsorption
variable charge soils
ions
activity coefficient
ion
water activity
functional group
isotherm
soil
water
material

All Science Journal Classification (ASJC) codes

  • Soil Science
  • Plant Science

これを引用

Ion adsorption on variable charge materials and thermodynamics of ion exchange. / Wada, Shin Ichiro; Kawabata, Kouya; Kawabata, Kouya.

:: Soil Science and Plant Nutrition, 巻 37, 番号 2, 06.1991, p. 191-200.

研究成果: ジャーナルへの寄稿記事

Wada, Shin Ichiro ; Kawabata, Kouya ; Kawabata, Kouya. / Ion adsorption on variable charge materials and thermodynamics of ion exchange. :: Soil Science and Plant Nutrition. 1991 ; 巻 37, 番号 2. pp. 191-200.
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