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Unformatted text preview: - -- -- -- -- -- -- -clay particle double layer free water Source Siva 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) Cation exchange capacity (CEC) CEC measures the ability of clay to exchange its cations. CEC measures the concentration in cations non fixed in the diffuse double layer and depends on the total charge (i.e., surface and structural charge). CEC depends on pH, and is generally given for neutral pH (7). measured in meq /100g (net negative charge per 100 g clay) milliequivalents...
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This note was uploaded on 03/21/2011 for the course GNG 4124 taught by Professor Soils during the Spring '11 term at Uni. of Nottingham Ningbo.
- Spring '11