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2020 Tong Effect of Graphite on Copper Bioleaching from Waste Printed Circuit Boards

Linlin Tong, Qianfei Zhao

2026enbioleachingcopperelectronic wasteprinted circuit boardsgraphitebacteria

Abstract

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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.

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Cite This Work

@article{6367cbf6-9355-474e-ad16-e3412ea6cb59,
  title={2020   Tong   Effect of Graphite on Copper Bioleaching from Waste Printed Circuit Boards},
  author={Linlin Tong and Qianfei Zhao},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - 2020   Tong   Effect of Graphite on Copper Bioleaching from Waste Printed Circuit Boards
AU  - Linlin Tong
AU  - Qianfei Zhao
PY  - 2026
LA  - en
ER  -

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