Acidic leaching and precipitation of zinc and manganese from spent battery powders using various reductants |
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| Authors: | E. Sayilgan T. Kukrer N.O. Yigit G. Civelekoglu M. Kitis |
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| Affiliation: | 1. ICSM, Institut de Chimie Séparative de Marcoule, UMR 5257, CEA/CNRS/ENSCM/UM, Bât 426, BP 17171, 30207 Bagnols-sur-Cèze cedex, France;2. SARPI VEOLIA, Direction Technique et Innovations, Zone portuaire de Limay-Porcheville, 427 route du Hazay, 78520 Limay, France;1. Department of Environmental Engineering, Wroclaw University of Technology, Wybrze?e Stanis?awa Wyspiańskiego 27, 50-370 Wroc?aw, Poland;2. Department of Chemistry, Wroclaw University of Technology, Wybrze?e Stanis?awa Wyspiańskiego 27, 50-370 Wroc?aw, Poland |
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| Abstract: | The main objective of this study was to investigate the effects of reductive acidic leaching and further precipitation on the recovery of manganese and zinc from spent alkaline and zinc–carbon battery powders. Ascorbic acid (AA), citric acid (CA) and oxalic acid (OA) were tested as the reductants. Sodium hydroxide and potassium hydroxide were used as precipitating agents. OA with H2SO4 or HCl was not effective on the leaching of zinc due to the formation of zinc oxalate precipitates. However, the other reducing agents (CA and AA) tested under various experimental conditions were effective in the acidic leaching of both zinc and manganese. Leaching yields of both manganese and zinc were higher at leach temperature of 90 °C than those at 30 °C. Leach solutions were purified by the selective precipitation of manganese and zinc using KOH or NaOH. Complete precipitation was obtained for Mn at pH 9–10 and for Zn at pH 7–8. The use of ascorbic acid or citric acid as reductants in acidic leaching appears to be effective in the simultaneous leaching and further recovery of zinc and manganese from spent alkaline and zinc–carbon battery powders. |
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