Cation-exchange behavior of several elements in nitric acid-organic sol vent media

Abstract EN

Distribution coefficient studies of the metal ions Ni , Ba , Al3+, Cr3+, Cu2+, Pb2+, Co2+ and Zn2+ on stannic silicomolybdate (H form) were performed in aqueous and aqueous- organic solvent systems having different dielectric constants namely ethanol, ethylene glycol and glycerol.

The effect of organic solvent percentage and temperature on the distribution coefficient was explored.

The efficiency of this action exchanger in different experimental conditions was established.

Due to the large difference in the distribution coefficient values, separations of the metal ions from their mixture were performed.

It was finally concluded that the 50 0C appeared to be the most favorable temperature.

Important quantitative separations of metal ions in binary mixtures including Cu2+- Pb2+, Cu2+- Co2+, Cu2+- Al3+, Ni2+- Pb2+, Ni2+- Al3+, Zn2+-Pb2+, Zn2+- Co2+, Zn2+- Al3+, Cr3+- Pb2+ and Ni2+ - Co2+ ; were performed.