A new strain for recovering precious metals from waste printed circuit boards

A new strain for recovering precious metals from waste printed circuit boards

•Physical treatments are hard to recover precious metals of waste PCBs.•A new strain was found to be used in the bioleaching of precious metals from waste PCBs.•8.2% of gold, 12.1% silver, and 52.3% copper in waste PCBs could be dissolved into solution by the new strain.•This paper contributed usefu...

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Bibliographic Details
Published in:Waste management (Elmsford) Vol. 34; no. 5; pp. 901 - 907
Main Authors: Ruan, Jujun, Zhu, Xingjiong, Qian, Yiming, Hu, Jian
Format: Journal Article
Language:English
Published: Kidlington Elsevier Ltd 01-05-2014
Elsevier
Subjects:
Applied sciences
Copper - metabolism
Cyanides - metabolism
DNA, Bacterial - genetics
Electronic Waste - analysis
Exact sciences and technology
Gold - metabolism
Molecular Sequence Data
Other wastes and particular components of wastes
Phylogeny
Pollution
Polychlorinated Biphenyls - metabolism
Precious metals
Pseudomonas - genetics
Pseudomonas - physiology
Recovering
RNA, Ribosomal, 16S - genetics
Sequence Analysis, DNA
Silver - metabolism
Waste Management
Waste PCBs
Wastes
Recovering
Precious metals
Waste PCBs
Pseudomonadales
Polychlorobiphenyls
Bacteria
Pseudomonadaceae
Bacterial leaching
Pseudomonas
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Summary:•Physical treatments are hard to recover precious metals of waste PCBs.•A new strain was found to be used in the bioleaching of precious metals from waste PCBs.•8.2% of gold, 12.1% silver, and 52.3% copper in waste PCBs could be dissolved into solution by the new strain.•This paper contributed useful information to recovering precious metals from waste PCBs. A new strain, Pseudomonas Chlororaphis (PC), was found for dissolving gold, silver, and copper from the metallic particles of crushed waste printed circuit boards (PCBs). The optimized conditions that greatly improved the ability of producing CN− (for dissolving metals) were obtained. Dissolving experiments of pure gold, silver, and copper showed that the metals could be changed into Au+, Ag+, and Cu2+. PC cells and their secreta would adsorb metallic ions. Meanwhile, metallic ions destroyed the growth of PC. Dissolving experiments of metallic particles from crushed waste PCBs were performed by PC. The results indicated that 8.2% of the gold, 12.1% silver, and 52.3% copper were dissolved into solution. This paper contributed significance information to recovering precious metals from waste PCBs by bioleaching.
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content type line 23
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2014.02.014