キレート樹脂による銅とニッケルの分離

抄録

The separation of Cu²⁺ and Ni²⁺ in an acidic aqueous solution with chelating ion-exchange resin, Dowex A-1, has been studied in the batch. and column processes. In the batch process, the adsorption test was carried out over the range of concentration from 0.001 to 0.1 M. Adsorption of Cu²⁺ and Ni²⁺ on the resin was influenced by various factors such as specieses of cation, pH value and concentration in the test solution. Although both Cu²⁺ and Ni²⁺ ions were adsorbed on the resin from the mixed solution, the adsorption ratio of Cu²⁺ to Ni²⁺ on the resin was increased with increasing the Cu²⁺ concentration in the solution. When thequantity of Cu²⁺ ion exceeds the exchange capacity of the resin, Cu²⁺ion was selectively adsorbed on the resin, and almost all of the Ni²⁺ ion remained in the solution. The data obtained from these experiments revealed that the batch process was more useful method than the column process for the selective separation of Cu²⁺ from the mixed solution containing Cu²⁺ and Ni²⁺ ions.