Recovery of manganese and zinc from spent Zn-C and alkaline batteries in acidic medium

Química Nova

Rafael Gudim Da Silva¹  Cristiano Nunes Da Silva¹  Júlio Carlos Afonso¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Departamento de Química AnalíticaRio de Janeiro RJ ,Brasil

关键词: zinc;    manganese;    spent batteries;   

DOI  :  10.1590/S0100-40422010000900024

来源: SciELO

【 摘 要 】

The anode and the internal paste of spent Zn-C and alkaline batteries were leached with 2 mol L-1 H2SO4 at 80 ºC for 2 h. Solid/liquid ratio was 1/10 (g mL-1). The leachate was treated with Na2S in order to precipitate Hg, Cd and Pb. Zn was quantitatively isolated at pH 1,5-2 by adding Na2S. Mn can be precipitated at pH close to 7. Na2S may be replaced by oxalic acid. Zn precipitated at pH around 0, whereas Mn was quantitatively recovered at pH > 4. Acidity control is a critical parameter. Na2SO4 and carbon are the end products.

【 授权许可】

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