| Summary: | 碩士 === 國立成功大學 === 資源工程學系 === 106 === With the vigorous development of 3C products and the electric vehicle market, the use of lithium-ion batteries increases. Therefore, this thesis focuses on the separation of valuable metals Ni, Co, Li, and Mn from spent lithium-ion batteries. The chemical precipitation and ion exchange are the methods used in this study.
According to the research results, the adsorption isotherms of chelating cation exchange resin (IRC748) for Ni, Co, and Mn is consistent with Langmuir model. The adsorption kinetics follow the Pseudo-second order kinetic model. Due to the similar adsorption behavior of Co and Mn for IRC748 resin, Mn was separated first by selective precipitation using KMnO4 as a precipitant. The remaining liquid was passed through a column filled with IRC748 resin for ion exchange separation. The resin selectively adsorbed Co and Ni and Li was collected in the exchange tail. The loaded resin was eluted with 2N HCl, and the eluted liquid was acidified to 8N concentration of HCl. In this context, Co forms an anion complex and was adsorbed by a strong base anion resin (IRA900Cl). In this way, the valuable metals in the leaching solution Ni, Co, Li, and Mn are separated and recovered.
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