ABSTRACT

The thermodynamic distribution coefficient of cadmium between calcite and solution has been determined from the measurement of the apparent distribution coefficient in the calcium bicarbonate solutions containing cadmium ions and bipyridine as a complexing agent with cadmium ions. The distribution of cadmium ions for aragonite in the solution containing magnesium ions (Mg²⁺: 1.2g/l) has also been examined. Thermodynamic distribution coefficient for cadmium was revealed not to be constant, although constant values were obtained for magnesium, copper, zinc, manganese, strontium, barium and other divalent ions.