Bioleaching of gold and copper from waste mobile phone PCBs by using a cyanogenic bacterium

被引：132

作者：

Chi, Tran D. ^{[1
,2
]}

Lee, Jae-chun ^{[1
]}

Pandey, B. D. ^{[1
,3
]}

Yoo, Kyoungkeun ^{[4
]}

Jeong, Jinki ^{[1
]}

机构：

[1] Korea Inst Geosci & Mineral Resources KIGAM, Mineral Resources Res Div, Taejon 305350, South Korea

[2] Univ Sci & Technol, Taejon 305350, South Korea

[3] CSIR, Natl Met Lab, Jamshedpur 831007, Bihar, India

[4] Korea Maritime Univ, Dept Energy & Resources Engn, Pusan 606791, South Korea

来源：

MINERALS ENGINEERING | 2011年 / 24卷 / 11期

关键词：

Bioleaching; Chromobacterium violaceum; Waste PCBs; Leaching of gold and copper; CHROMOBACTERIUM-VIOLACEUM; CYANIDE; SOLUBILIZATION;

D O I：

10.1016/j.mineng.2011.05.009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

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 similar to 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 degrees 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. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1219 / 1222

页数：4

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