Effect of Graphite on Copper Bioleaching from Waste Printed Circuit Boards

被引：13
|
作者：
Tong, Linlin [1 ,2 ]
Zhao, Qianfei [1 ,2 ]
Kamali, Ali Reza [2 ,3 ,4 ]
Sand, Wolfgang [5 ,6 ,7 ]
Yang, Hongying [1 ,2 ]
机构：
[1] Northeastern Univ, Minist Educ, Key Lab Ecol Met Multimetall Mineral, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
[3] Northeastern Univ, Energy & Environm Mat Res Ctr E2MC, Shenyang 110819, Peoples R China
[4] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB3 0FS, England
[5] Donghua Univ, Coll Environm Sci & Engn, Shanghai 201620, Peoples R China
[6] Min Acad & Tech Univ Freiberg, Inst Biosci, D-09599 Freiberg, Germany
[7] Univ Duisburg Essen, Biofilm Ctr, Fac Chem, D-45141 Essen, Germany
来源：
MINERALS | 2020年 / 10卷 / 01期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
waste printed circuit boards; graphite; bacteria; leaching; copper; METALS; RECOVERY;
D O I：
10.3390/min10010079
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The efficient extraction of copper as a valuable metal from waste printed circuit boards (WPCBs) is currently attracting growing interest. Here, we systematically investigated the impact of bacteria on the efficiency of copper leaching from WPCBs, and evaluated the effect of graphite on bioleaching performance. The HQ0211 bacteria culture containing Acidithiobacillus ferrooxidans, Ferroplasma acidiphilum, and Leptospirillum ferriphilum enhanced Cu-leaching performance in either ferric sulfate and sulfuric acid leaching, so a final leaching of up to 76.2% was recorded after 5 days. With the addition of graphite, the percentage of copper leaching could be increased to 80.5%. Single-factor experiments confirmed the compatibility of graphite with the HQ0211 culture, and identified the optimal pulp density of WPCBs, the initial pH, and the graphite content to be 2% (w/v), 1.6, and 2.5 g/L, respectively.
引用
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页数：10
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