Interactions of secondary amines with bentonite clay and humic materials in dilute aqueous systems |
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| Authors: | Bishop B Sithole Robert D Guy |
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| Institution: | Environmental Health Centre, Monitoring and Criteria Division, Health and Welfare Canada, Tunney''s Pasture, Ottawa, Ontario, Canada, K1A 0L2;Trace Analysis Research Centre, Chemistry Department, Dalhousie University, Halifax, NS, Canada, B3H 4J3 |
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| Abstract: | The speciation of dimethylamine, diethylamine, dibutylamine, and diethanolamine on bentonite clay saturated with 1) Na and Ca cations, 2) dodecyltrimethylammonium cation, and 3) tannic acid, and on humic acid and peat, has been studied. Adsorption isotherms were determined and the effect of ionic strength and pH on the adsorption were studied. The results show that the amines react with the particulates by ion exchange mechanisms. Hydrogen bonding seems to also contribute to the binding of dibutylamine. |
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