Title: Frothless ion flotation of some trivalent actinides
Abstract: Frothless ion flotation of amerlcium in the form of anionic complexes with citric acid, with the aid of the cationic collector (cetylpyridynium bromide), was studied as a function of citric acid concentration, flotation time, and hydrogen ion concentration. Flotation of microcolloidal amerlcium hydroxides from aqueous solutions as a function of hydrogen ion concentration was also studied using the anionic collector sodlum tetradecyl sulphate. Trivalent actinides behave similarly to the rare earth elements. The microcolloidal hydroxides float with anionic detergents as the collectors with the maximum recovery at pH of about 5. It was shown that the americium recovery by ion flotation decreases linearly with an increase of ammonium citrate concentration. Similarly, the extraction of americium with solutions of cetylpyridinium bromide in isooctyl alcohol decreases with a rise of ammonluin citrate concentration in the aqueous phase, at constant pH equal to about 10.5. The experimerts show that the equilibrium between the citrate complexes of americlum shifts toward electrically neutral complexes which do not undergo ion exchange with the extraction agent used. Experiments on flotoextraction of anionic complexes of Am and Cm with nitrate ions were also carried out in a wide range of lithium nitrate concentrations in 0.01 N HNO/sub 3/.more » The recovery of Am and Cm by ion flotoextraction increases with the increase of LiNO/sub 3/ concentration. (auth)« less
Publication Year: 1973
Publication Date: 1973-01-01
Language: en
Type: article
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Cited By Count: 1
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