Characterization of Spent Household Zinc-Carbon Dry Cell Batteries in the Process of Recovery of Value MetalsReportar como inadecuado




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Spent zinc-carbon dry cell batteries were characterized to assess the environmental impactsand also, to identify the potentials of recovering the metal values from these batteries. Differentcomponent parts of both new and spent batteries of all the five types AAA, AA, C, D and 9Vwere examined. The outer steel casings were found to be tin plated. Steel, zinc and manganeseconstituted 63 percent of the total weight of the battery. Average zinc and manganese contentswere about 22 and 24 percent of the total weight of spent batteries. The electrolyte paste of thespent batteries contained 22 wt. percent zinc and 60 wt. percent manganese. The rest waschlorine, carbon and small amounts of iron and other impurity elements. The major phases inthe fresh batteries were carbon, MnO2 and NH4Cl, while ZnNH32Cl2, ZnO.Mn2O3, Mn3O2 andMn2O4 were the prominent phases in the spent batteries. Presence of mercury and cadmiumwere not detected and a small percentage of lead was found in both the zinc anode and in theelectrolyte paste.

KEYWORDS

Zinc-carbon battery, Characterization, Spent batteries, Waste management

Cite this paper

M. Khan and A. Kurny -Characterization of Spent Household Zinc-Carbon Dry Cell Batteries in the Process of Recovery of Value Metals,- Journal of Minerals and Materials Characterization and Engineering, Vol. 11 No. 6, 2012, pp. 641-651. doi: 10.4236-jmmce.2012.116047.





Autor: Majharul Haque Khan, A.S.W Kurny

Fuente: http://www.scirp.org/



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