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Sorption of Hexadecylammonium Ions on Reduced Charge Montmorillonite

J. Bujdák, H. Slosiariková, and B. Číčel

Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, CS-842 15 Bratislava


Abstract: Using lithium fixation, a series of montmorillonite samples were prepared which had reduced negative layer charges. The sorption of hexadecylammonium (HDA) ions was found to be controlled by the remaining layer charge. The relation between the amount of HDA sorbed by one gram of Li-treated montmorillonite and the cation-exchange capacity (CEC) of the sample was found to be QHDA/(mmol g-1) = 0.214 + 1.723 CEC for CEC values lower than 0.75 mmol g-1. This relation was valid if the HDA present was sufficient to reach the saturation point. The amount of exchangeable Ca2+ ions desorbed after HDA sorption was only 83 to 93 % of the remaining CEC.

Full paper in Portable Document Format: 472a85.pdf


Chemical Papers 47 (2) 85–87 (1993)

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