Siberian Federal University

The reduction of cadmium ions from aqueous solutions was carried out with zinc powder, particle size from 63 to 200 μm. In a number of experiments, the influence of the cationic flocculant Besfloc K6645 on the cadmium cementation process was tested. The process was carried out in the temperature range from 30 to 50 °C with continuous stirring at a speed of 200 rpm with an overhead stirrer. Kinetic curves were built using a cadmium selective electrode. It is shown that an increase in the reaction temperature has a positive effect on cementation. The introduction of a flocculant in the amount of 70 mg/l into the electrolyte reduced the degree of cadmium cementation. respectively, when carrying out the reduction without the addition of a flocculant, and 117–130 and 82–85 kJ/mol in the presence of the Besfloc K6645 flocculant. When cadmium was reduced in the presence of a flocculant, the apparent activation energy more than doubled