Abstract
Hostarex DK-16 was introduced by Hoechst, Germany. This paper concerns the extraction of zinc from aqueous ammoniacal solutions using Hostarex DK-16 as the extractant. The effect of the pH of the aqueous solution, and subsequent zinc ammine complex formation, on the extraction of zinc were examined. The effect of temperature on the extraction of zinc was also studied. Stripping was carried out at various temperatures and acid concentrations. Arrhenius plots were drawn for extraction as well as stripping studies. The extraction and stripping rates and their distribution isotherms have been examined. The loading capacity and temperature effect for Hostarex DK-16 were compared with other extractants.
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