Abstract
NaCl-water saturated kaolinite is observed to show pH-dependent electro-osmotic flow. This behaviour is modelled by computing the electro-osmotic flow between parallel planes as a function of their electrical surface charge density. The latter can be related to pH through the physico-chemical properties of the material. In case of kaolinite particles, isomorphic substitution and two surface dissociation reactions allow to predict the pH-dependence of the electrical charge density and thus the variations of electro-osmotic flows with pH. To cite this article: P. Dangla et al., C. R. Mecanique 332 (2004).
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