The macromolecular ion flotation of Fe3+,Cu2+, and Ni2+ by the use of charcoal and cationic surfactant.

概要

論文の詳細を見る
The macromolecular ion flotation of Fe3+, Cu2+, and Ni2+ ions by the combined use of charcoal and hexadecyltrimethylammonium chloride (HTAC) was studied. The flotation of powdered active charcoal itself was first studied; a 100% floatability was obtained for the flotation of 2500 ppm charcoal by the addition of 6 ppm of polyacrylamide and 550 ppm of HTAC in the pH range from 4 to 13. For the studies of the flotation of Fe3+, Cu2+, and Ni2+ ions, diagrams of the floatability of the respective ions vs. the composition of charcoal and HTAC, and the floatability of the respective ions vs. the pH at a constant composition of charcoal and HTAC, were constructed. A nearly 100% floatability was obtained for Fe3+, Cu2+, and Ni2+ ions at pH values larger than 4.5, 9.5, and 11 respectively. This order is the same as that of the solubility products of Fe(OH)3, Cu(OH)2, and Ni(OH)2. It was confirmed that Fe3+ ions are adsorbed as hydroxides on charcoal; they are subsequently floated over the whole range of pH values combined with charcoal, while the Cu2+ and Ni2+ ions are adsorbed as simple ions on charcoal and floated in the lower pH region. They are adsorbed as hydroxide on charcoal and floated in a higher pH region.
公益社団法人日本化学会の論文