Coagulation-dispersion and Precipitation-flotation Behavior of Bentonite and Cadmium-ion Flotation
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概要
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The states of dispersion and the precipitation-flotation behavior of bentonite particles in an aqueous solution of hexadecyltrimethylammonium chloride (HTAC) were studied, and the effect of the HTAC on the coagulation and dispersion was discussed in connection with its adsorption on bentonite. The coagulation precipitation of bentonite began to occur at the ratio of the adsorbed amount to an exchange capacity, <I>A</I>⁄<I>T</I>, of about 0.05. It changed to coagulation flotation in the vicinity of <I>A</I>⁄<I>T</I>=1.2. The change was very sharp. The results suggest that the change from precipitation to flotation is produced by the adsorption of HTAC a little in excess of the first-layer formation, where a slight hydrophilization begins. It seems likely that, in the above state, the bubbles are easily accessible to bentonite particles because the agglomerates assume an open structure. The redispersion occurred near the point of sufficient hydrophilization of bentonite particles because of the adsorption of the second layer of cationic surfactant molecules.
- 公益社団法人 日本化学会の論文
著者
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Kobayashi Koichi
Department Of Anesthesiology And Resuscitology Shinshu University School Of Medicine
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Sasaki Tsunetaka
Department of Chemistry Faculty of Science Tokyo Metropolitan University
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Inakazu Toyono
Department of Chemistry, Faculty of Science, Tokyo Metropolitan University
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