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

Quimica nova

Afonso, Júlio Carlos¹  Silva, Cristiano Nunes da¹  Silva, Rafael Gudim da¹ 

[1] Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil

关键词: zinc;    manganese;    spent batteries.;   

DOI  :  10.1590/S0100-40422010000900024

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The anode and theinternal paste of spent Zn-C and alkaline batteries were leached with 2 molL-1 H2SO4 at 80 ºC for 2 h. Solid/liquid ratiowas 1/10 (g mL-1). The leachate was treated with Na2Sin order to precipitate Hg, Cd and Pb. Zn was quantitatively isolated at pH1,5-2 by adding Na2S. Mn can be precipitated at pH close to 7. Na2Smay be replaced by oxalic acid. Zn precipitated at pH around 0, whereas Mn wasquantitatively recovered at pH > 4. Acidity control is a criticalparameter. Na2SO4 and carbon are the end products.

【 授权许可】

CC BY