Role of pH in electro-osmosis: Experimental study on NaCl-water saturated kaolinite

被引：32

作者：

Beddiar, K ^{[1
]}

Fen-Chong, T ^{[1
]}

Dupas, A ^{[1
]}

Berthaud, Y ^{[1
]}

Dangla, P ^{[1
]}

机构：

[1] LMSGC, Inst Navier, F-77420 Champs Sur Marne, France

来源：

TRANSPORT IN POROUS MEDIA | 2005年 / 61卷 / 01期

关键词：

electro-osmosis; electrokinetic; physico-chemical couplings; pore pressure; pH; kaolinite; hydraulic permeability; electro-osmotic permeability;

D O I：

10.1007/s11242-004-6798-9

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Electro-osmosis experiments were conducted on rigid cylindrical samples containing 0.01 M NaCl-water saturated Speswhite kaolinite. It is experimentally found that the electro-osmotic permeability is pH-dependent. It is also experimentally found that time and spatial variations of the sample pH and of the pore water pressure correlate. This is qualitatively confirmed by a simple analysis that couples the electro-osmotic and hydraulic flows through the pH-dependent electro-osmotic permeability. However quantitative agreement between the experimental and numerical values of the pore water pressure is not obtained throughout the whole sample. This suggests that the hydraulic permeability may also depend on the pH.

引用

页码：93 / 107

页数：15

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