高等学校化学学报

高等学校化学学报 ›› 1991, Vol. 12 ›› Issue (12): 1644.

• 研究论文 • 上一篇    下一篇

双电层相互重叠时蒙脱胶体表面阴离子的负吸附

蒋新1, 尹大强1, 薛家骅2   

  1. 1. 南京大学环境科学系, 南京, 210008;
    2. 南京农业大学基础部
  • 收稿日期:1990-10-13 出版日期:1991-12-24 发布日期:1991-12-24
  • 通讯作者: 蒋新

Anion Negative Adsorption by Montmorillonite Colloid Surface with Overlapping Electric Double Layers

Jiang Xin1, Yin Da-qiang1, Xue Jia-hua2   

  1. 1. Department of Environmental Science., Nanjing University, Nanjing, 210008;
    2. Department of Basic Science, Nanjing Agricultural University, Nanjing, 210004
  • Received:1990-10-13 Online:1991-12-24 Published:1991-12-24

PDF (PC)

被引次数

8

摘要： 本文用Ag-AgCl电极判断平衡,测定双电层处于不同重叠程度下肢体表面阴离子的负吸附量Γ.结果表明,胶体表面双电层相互重叠程度可由两胶体表面间的中点电位φd与外Helmhotz面处的电位φd之比表征;阴离子负吸附随双电层重叠程度和电解质浓度的增加而显著减小.

关键词: 双电层, 蒙脱腔体, 阴离子负吸附

Abstract: Anion negative adsorption by montmorillonite colloid surface with overlapping flat double layers was determined and the influence of the overlappping degree of the flat double layers and the electrolyte concentration on the anion negative adsorption is discussed. The experimental results are concluded as following: (1) the overlapping degree of the flat double layers can be described by the variation of the ratio of the electric potential at the midplane,φd, to the electric potential at the Outer Helmhotz Plane(OHP), φδ; (2) the overlapping degree of the flat double layers, φd/φδ, raises with the increase of the applied pressure; (3) the anion negative adsorption decreases with the increase of the overlapping degree of the flat double layers and the increase of the electrolyte concentration.

Key words: Electric double layer, Montmorillonite colloid, Anion negative adsorption

TrendMD: