Resumo

WAI LIN, Shui; VARGAS-GALARZA, Zully  e  FELIX-NAVARRO, Rosa María. Optimizing the Conditions for Leaching Lead from Solid Waste Produced by Pyrometallurgical Process of Recycling Automobile Used Batteries. J. Mex. Chem. Soc [online]. 2006, vol.50, n.2, pp.64-70. ISSN 1870-249X.

Over 90 % of automobile used lead-acid batteries are recycled worldwide. The typical new car battery contains 60-80 % recycled lead. The current method of disposing lead-contaminated solid waste, generated by lead-acid battery recycling industries, is to bury it in a remote waste management site. This practice of disposing such hazardous solid waste (~22 % in lead) is not a positive approach to solve the environmental problem. In this work we determined the optimal conditions for leaching lead from solid waste using EDTA. Our experimental results indicate that at pH 4.8, a leaching temperature of 55^oC and a 30 min leaching time, 96.8 % of lead present was leached from the solid having particle size <325 mesh (0.051 mm).

Palavras-chave : Automobile battery recycling; lead leaching time; pH; temperature; particle size.

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