A Novel Designed Bioreactor for Recovering Precious Metals from Waste Printed Circuit Boards.
A Novel Designed Bioreactor for Recovering Precious Metals from Waste Printed Circuit Boards.
复制标题
一种新颖设计的生物反应器，用于从废弃印刷电路板中回收贵金属
DOI：
10.1038/srep13481
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发表时间：
2015-08-28
影响因子：
4.6
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Jujun R;Jie Z;Jian H;Zhang J
For recovering precious metals from waste printed circuit boards (PCBs), a novel hybrid technology including physical and biological methods was developed. It consisted of crushing, corona-electrostatic separation and bioleaching. Bioleaching process is the focus of this paper. A novel bioreactor for bioleaching was designed. Bioleaching was carried out usingPseudomonas chlororaphis.Bioleaching experiments using mixed particles of Au and Cu were performed and leachate contained 0.006 mg/L, 2823 mg/L Au+and Cu2+respectively. It showed when Cu existed, the concentrations of Au were extremely small. This provided the feasibility to separate Cu from Au. The method of orthogonal experimental design was employed in the simulation bioleaching experiments. Experimental results showed the optimized parameters for separating Cu from Au particles were pH 7.0, temperature 22.5 °C and rotation speed 80 r/min. Based on the optimized parameters obtained, the bioreactor was operated for recovering mixed Au and Cu particles. 88.1 wt.% of Cu and 76.6 wt.% of Au were recovered. The paper contributed important information to recover precious metals from waste PCBs.
