| Full text | |
| Author(s): |
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: | 08/53254-1 - Recuperação de metais de placas de circuito impresso de computadores obsoletos através de processo biohidrometalurgico |
| Grantee: | Luciana Harue Yamane |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| 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 |