Abstract
The adsorption on montmorillonite of two monovalent organic cations, methylene blue (MB) and thioflavin T (TFT), was studied in four different situations: (1) separate adsorption of MB or TFT; (2) competitive adsorption of TFT and Cs; (3) competitive adsorption of the two organic cations from their equimolar solutions; and (4) adsorption of TFT on a clay whose cation-exchange capacity (CEC) had been previously saturated with MB. A model was developed to evaluate the strength of the clay-organic cation interactions. The charge reversal predicted by the model beyond the CEC of the clay was confirmed by microelectrophoretic experiments. Study methods and results are discussed.
Original language | English |
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Pages (from-to) | 270-276 |
Number of pages | 7 |
Journal | Clays and Clay Minerals |
Volume | 36 |
Issue number | 3 |
DOIs | |
State | Published - 1988 |