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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Bioleaching of copper from electronic scrap

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Author(s):
Luciana Harue Yamane [1] ; Denise Crocce Romano Espinosa [2] ; Jorge Alberto Soares Tenório [3]
Total Authors: 3
Affiliation:
[1] Universidade de São Paulo. Escola Politécnica
[2] Universidade de São Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
[3] Universidade de São Paulo. Escola Politécnica. Departamento de Engenharia Metalúrgica e de Materiais
Total Affiliations: 3
Document type: Journal article
Source: Rem: Revista Escola de Minas; v. 64, n. 3, p. 327-333, 2011-09-00.
Abstract

The present work investigated the influence of ferrous iron supplementation on bioleaching to recover copper from printed circuit boards using Acidithiobacillus ferrooxidans-LR bacteria. Printed wiring boards from obsolete computers were mechanically processed through cominution followed by magnetic separation. The Acidithiobacillus ferrooxidans-LR bacteria were grown and adapted in the presence of printed wiring board samples. A shake flask study was carried out on the printed circuit board samples using a rotary shaker at 30ºC and 185 rpm. The analyzed parameters were: the pH of the medium, the initial ferrous iron concentration and the metal concentrations (ICP-OES). The results showed that the bacterial adaptation process enhanced the copper extraction rate. The bioleaching with adapted Acidithiobacillus ferrooxidans-LR leached out 56% of the copper from printed circuit boards (non-magnetic fraction) with the medium being supplemented by ferrous iron after 30 days. (AU)

FAPESP's process: 10/51009-0 - Gold recovery of printed circuit boards of obsolete computers by biohydrometallurgical process
Grantee:Jorge Alberto Soares Tenório
Support type: Regular Research Grants