Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium
Chromobacterium violaceum (C. violaceum), a cyanide generating bacterium has been used to leach out gold and copper from the waste mobile phone printed circuit boards (PCBs) containing ~34.5% Cu and 0.025% Au in YP (yeast extract and polypeptone with glycine) medium. The bioleaching was carried out...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
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na
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/66300 |
| _version_ | 1848761288590622720 |
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| author | Chi, T. Lee, J. Pandey, B. Yoo, Kyoungkeun Jeong, J. |
| author2 | na |
| author_facet | na Chi, T. Lee, J. Pandey, B. Yoo, Kyoungkeun Jeong, J. |
| author_sort | Chi, T. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Chromobacterium violaceum (C. violaceum), a cyanide generating bacterium has been used to leach out gold and copper from the waste mobile phone printed circuit boards (PCBs) containing ~34.5% Cu and 0.025% Au in YP (yeast extract and polypeptone with glycine) medium. The bioleaching was carried out in an incubator shaker (150 rpm) at 30 °C and 15 g/L pulp density in the pH range 8-11. Dissolution of gold and copper increased from 7.78% (0.225 ppm) to 10.8% (0.46 ppm) and 4.9% (419 ppm) to 11.4% (879 ppm) in 8 days with increase in pH from 8 to 11 and 8 to 10 respectively. Supplementing oxygen with 0.004% (v/v) H 2 O 2 increased the copper leaching to 24.6% (1743 ppm) at pH 10 in 8 days whereas improvement in gold leaching was insignificant with the recovery of 11.31% Au at pH 11.0. The waste PCBs can thus be recycled in environmental friendly manner. © 2011 Elsevier Ltd. All rights reserved. |
| first_indexed | 2025-11-14T10:29:18Z |
| format | Conference Paper |
| id | curtin-20.500.11937-66300 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:29:18Z |
| publishDate | 2011 |
| publisher | na |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-663002018-04-30T02:49:03Z Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium Chi, T. Lee, J. Pandey, B. Yoo, Kyoungkeun Jeong, J. na Chromobacterium violaceum (C. violaceum), a cyanide generating bacterium has been used to leach out gold and copper from the waste mobile phone printed circuit boards (PCBs) containing ~34.5% Cu and 0.025% Au in YP (yeast extract and polypeptone with glycine) medium. The bioleaching was carried out in an incubator shaker (150 rpm) at 30 °C and 15 g/L pulp density in the pH range 8-11. Dissolution of gold and copper increased from 7.78% (0.225 ppm) to 10.8% (0.46 ppm) and 4.9% (419 ppm) to 11.4% (879 ppm) in 8 days with increase in pH from 8 to 11 and 8 to 10 respectively. Supplementing oxygen with 0.004% (v/v) H 2 O 2 increased the copper leaching to 24.6% (1743 ppm) at pH 10 in 8 days whereas improvement in gold leaching was insignificant with the recovery of 11.31% Au at pH 11.0. The waste PCBs can thus be recycled in environmental friendly manner. © 2011 Elsevier Ltd. All rights reserved. 2011 Conference Paper http://hdl.handle.net/20.500.11937/66300 10.1016/j.mineng.2011.05.009 na restricted |
| spellingShingle | Chi, T. Lee, J. Pandey, B. Yoo, Kyoungkeun Jeong, J. Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title | Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title_full | Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title_fullStr | Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title_full_unstemmed | Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title_short | Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium |
| title_sort | bioleaching of gold and copper from waste mobile phone pcbs by using a cyanogenic bacterium |
| url | http://hdl.handle.net/20.500.11937/66300 |