Abstract
In recent years, usability of ionic liquids in the extraction processes of ores and secondary raw materials has been attracted due to their promising potential as green solvents. In this study, 1-methylimidazolium hydrogen sulfate (HmimHSO4) ionic liquid and its aqueous solutions have been used as leaching media for the leaching of brass dross to recovery of copper and zinc in the presence of hydrogen peroxide (H2O2) as oxidant. The leaching experiments were carried out in the temperature range from 40 to 80°C at ambiance pressure with 100 g/L pulp density. The leaching behavior of copper and zinc has been discussed and the influences of ionic liquid concentration, leaching time and temperature on the metal recovery rate have been investigated. The results indicated that high copper and complete zinc extraction has been achieved under the optimum conditions.
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