Recovery of manganese and zinc via sequential precipitation from spent zinc-MnO2 dry cells after fusion with potassium hydrogenosulfate

被引：16

作者：

Quintanilha, Carolina Leao ^{[1
]}

Afonso, Julio Carlos ^{[1
]}

Vianna, Claudio Augusto ^{[2
]}

Gante, Valdir ^{[2
]}

Mantovano, Jose Luiz ^{[2
]}

机构：

[1] Univ Fed Rio de Janeiro, Inst Chem, Dept Analyt Chem, BR-21941909 Rio De Janeiro, RJ, Brazil

[2] Inst Engn Nucl, Dept Quim & Mat Nucl, BR-21941906 Rio De Janeiro, RJ, Brazil

来源：

JOURNAL OF POWER SOURCES | 2014年 / 248卷

关键词：

Zinc; Manganese; Precipitation; Spent batteries; CARBON BATTERIES; ALKALINE; SEPARATION; CATALYSTS; SIMULATION;

D O I：

10.1016/j.jpowsour.2013.09.111

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This work describes a route for processing the electroactive components of spent zinc-MnO2 dry cells via fusion with potassium hydrogenosulfate (KHSO4). The fused mass was dissolved in water. Lead remained in the insoluble matter. Soluble zinc and manganese were isolated by a two-step precipitation procedure. Zinc was precipitated as oxalate after addition of aqueous H2C2O4 at pH around 1. Manganese was isolated as MnO(OH)(2) after adjusting pH at 11 using aqueous KOH + H2O2. pH control is essential for a successful separation of the elements. Both were recovered in high yields (>92 wt.%). About 75 wt.% of potassium was recovered as K2SO4 after treatment of the final effluent with sulfuric acid (pH 7) followed by slow evaporation. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：596 / 603

页数：8

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