Distribution coefficients and cation-exchange behaviour of some ammines and aquo complexes of metallic elements in ammonium nitrate solution |
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Authors: | FWE Strelow |
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Institution: | Division of Processing and Chemical Manufacturing Technology, CSIR, P.O. Box 395, Pretoria 0001 South Africa |
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Abstract: | Comparative cation-exchange distribution coefficients of ammines and aquo complexes of Cu(II), Ni(II), Cd, Zn, Ag, Co(II)/(III), Hg(II), Pd(II), Au(III) and Pt(II) were determined in 0.1, 0.2, 0.5 and 1.0 M ammonium nitrate solution. The values for mercury(II) in ammonium chloride and of the ammine of copper(II) in ammonium citrate and ammonium sulphosalicylate solutions were also measured. The ion-exchange behaviour of the ammines is discussed and some possible separations are demonstrated by the experimental elution curves for the ion pairs Mg-Ni(II), Ca-Zn, Yb-Cd and Fe(III)-Cu(II). |
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