Cation exchange capacity of natural and synthetic hectorite
Source abstract
Abstract
Abstract Cation exchange capacity (CEC) of smectites is a function of both layer charge and lateral layer dimension, the later ones determining their edge surface area. Two trioctahedral smectites similar in layer charge, the Na-saturated hectorite SHCa-1 10 was correlated to the deprotonation of the silanol edge sites. The larger CEC development observed for Laponite® RD was related to its morphology and larger edge specific surface area. Estimation of the exchangeable cation population following the usual Cu-trien procedure led to an overestimation of Mg2 + and Li+ due to partial clay dissolution at pH
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Research context
OpenAlex topics: Clay minerals and soil interactions · Iron oxide chemistry and applications · Soil and Unsaturated Flow
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