CVG-2107 (Chapter 2) 13

CVG-2107 (Chapter 2) 13 - charged in general . The edges...

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Prof. M. Fall - Uniersity of Ottawa Prof. M. Fall - Uniersity of Ottawa 13 Specific surface e.g., soil grain with specific gravity of 2.7 10 mm cube 1 mm cube surface spec. = 222.2 mm 2 /g surface spec. = 2222.2 mm 2 /g 4.4 Fundamental properties of…… Some basic concepts h smaller the grain, higher the specific surface Specific surface 4.4 Fundamental properties of…… Some basic concepts Specific surface Clay group 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) External or interlayer surfaces are negatively
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Unformatted text preview: charged in general . The edges can be positively or negatively charged. Dry condition- ou +- ou + Cation Kaolinite and negative gold sol (van Olphen, 1991) Clay minerals often display net electric imbalance, i.e. are charged Electrochemical properties of clay minerals The table shows electric charge of common clay minerals The electric charge of common clay minerals Clay group Electrochemical properties of clay mineral How were born these loads or charges at the surface of clays? Isomorphic substitution The most frequent causes include: Break of the edge Electrochemical properties of clay mineral...
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