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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

Full text
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 Opportunities: Regular Research Grants