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CVG-2107 (Chapter 2) 14 - The three main types of clay...

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Prof. M. Fall - Uniersity of Ottawa Prof. M. Fall - Uniersity of Ottawa 14 Isomorphic substitution head2right substitution of Si 4+ and Al 3+ by other lower valence (e.g., Mg 2+ ) cations head2right results in charge imbalance (net negative) + + + + + + + _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ positively charged edges negatively charged faces Clay Particle with Net negative Charge Source Siva Electrochemical properties of clay mineral Isomorphic substitution Electrochemical properties of clay mineral Isomorphic substitution Electrochemical properties of clay mineral Break of the edge The broken edge can be positively or negatively charged. Electrochemical properties of clay mineral
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Unformatted text preview: The three main types of clay mineral are: kaolinite, montmorillonite, illite Distribution of the negative charges Schema Space between the layers Small and constant Variable (small to big) medium & constant Only at border of the layers at border of the layers and many between the layers at border of the layers and some between the layers Some basic concepts 4.4 Fundamental properties of…… Double diffusive layer Electrochemical properties of clay minerals Interactions clay-water (swelling of clays) Cation exchange capacity (CEC)...
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