The dissolution mechanism of cathodic active materials of spent Zn–Mn batteries in HCl

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• 作者：Yunqing Li and Guoxi Xi
• 关键词：Spent Zn– ; Mn batteries ; Cathodic active materials ; Dissolution mechanism
• 刊名：Journal of Hazardous Materials
• 出版年：2005
• 出版时间：9 December 2005
• 年：2005
• 卷：127
• 期：1-3
• 页码：244-248
• 全文大小：170 K

文摘

The cathodic active materials of spent Zn–Mn batteries are complicated. The majority materials that they contain are Mn(OH)₂, Mn₂O₄, λ-Mn₂O₂, ZnMn₂O₄, Zn(NH₃)₂Cl₂, [Zn(OH)₂]₄·ZnCl₂, etc. Dissolving these kinds of materials is important to the environmental pollution control and materials recycle. In present paper we investigated the dissolution mechanism of the cathodic active materials in HCl by testing the factors that can influence the dissolution procedure, including temperature, time, and the concentration of HCl and H₂O₂. Our results showed that both neutralization and oxidation–reduction reactions occurred in the dissolution process, and that H₂O₂ had a great effect on the dissolution efficiency.