Influence of surfactants on properties of precipitates of difficultly soluble compounds of actinides and lanthanides

The main regularities of the effect of various surfactant classes on the properties of ammonium diuranate precipitates, prepared by the action of ammonia concentrated solution on uranyl nitrate nitric acid solution, are established. It is shown, that monomolecular cationogenic surfactants promote the increase in ammonium diuranate sedimentation rate. High-molecular catiogenic surfactants affect negatively the rate of suspension sedimentation and filtration, increase the precipitate humidity. The effect of high-molecular nonionogenic surfactants is similar to the effect of monomolecular surfactants of the same type. Anionogenic polyelectrolytes are shown to be the most effective flocculants of ammonium diuranate. Insignificant concentrations of the substances in suspension permit to increase the rate of sedimentation and filtration, to decrease ammonium diuranate precipitate humidity due to the formation of stable, resilient flakes