Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Studies of the Removal of Cd2+ Ions by Adsorbing Particle Flotation
Koichi Kobayashi
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1975 Volume 48 Issue 6 Pages 1750-1754


The conditions for the removal of Cd2+ ions from an aqueous solution by adsorbing particle flotation using bentonite and a cationic surfactant has been investigated. It has been found that the most suitable method was to conduct notation in the region of the coagulation notation of bentonite. The addition of polyacrylamide (PAA) extended not only the region of coagulation flotation towards lower and higher hexadecyltrimethylammonium chloride (HTAG) concentrations tested, but also increased the flotation efficiency (expressed as the percentage of ions removed from the total solution). The selective flotation from an aqueous solution containing two kinds of metal ions was also investigated. Each metal ion could be floated from the solution with the pH of the metal hydroxide formation. By selecting proper conditions, it was possible to remove each metal ion separately from a mixed solution.

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