2021 Volume 40 Issue 3
Article Contents

WANG Zhihui, YUAN Shuqi, LIU Jinghao, WU Yufeng, YU Jiamei. Research progress of hydrometallurgy technology for leaching precious metals in waste printed circuit board[J]. Environmental Chemistry, 2021, (3): 886-895. doi: 10.7524/j.issn.0254-6108.2020070701
Citation: WANG Zhihui, YUAN Shuqi, LIU Jinghao, WU Yufeng, YU Jiamei. Research progress of hydrometallurgy technology for leaching precious metals in waste printed circuit board[J]. Environmental Chemistry, 2021, (3): 886-895. doi: 10.7524/j.issn.0254-6108.2020070701

Research progress of hydrometallurgy technology for leaching precious metals in waste printed circuit board

  • Corresponding author: YU Jiamei, jyu@bjut.edu.cn
  • Received Date: 06/07/2020
    Fund Project: Supported by National Key Research and Development Program (2018YFC1902506).
  • The number of waste printed circuit boards (WPCB) is increasing year by year, and proper disposal of waste printed circuit boards not only reflects its recycling value, but also has considerable environmental benefits. Hydrometallurgy processing of WPCB technology is mature, with the advantages of short process, high efficiency.This article summarized the leading-edge reports of leaching methods of precious metals(mainly taking Au as an example) in WPCB,and compared these methods from the aspects of efficiency, environmental impact, and cost evaluation.The analysis showed that thiourea method and the iodization method were the best leaching methods with high leaching efficiency, low environmental impact and controllable cost.It was proposed that reasonable and effective disposal of WPCB, reduction environmental pollution in the process of disposal and efficient recovery of precious metals. It is necessary to consider different factors and use different leaching and enrichment recovery methods together to achieve the best recovery effect of precious metals.
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Research progress of hydrometallurgy technology for leaching precious metals in waste printed circuit board

Fund Project: Supported by National Key Research and Development Program (2018YFC1902506).

Abstract: The number of waste printed circuit boards (WPCB) is increasing year by year, and proper disposal of waste printed circuit boards not only reflects its recycling value, but also has considerable environmental benefits. Hydrometallurgy processing of WPCB technology is mature, with the advantages of short process, high efficiency.This article summarized the leading-edge reports of leaching methods of precious metals(mainly taking Au as an example) in WPCB,and compared these methods from the aspects of efficiency, environmental impact, and cost evaluation.The analysis showed that thiourea method and the iodization method were the best leaching methods with high leaching efficiency, low environmental impact and controllable cost.It was proposed that reasonable and effective disposal of WPCB, reduction environmental pollution in the process of disposal and efficient recovery of precious metals. It is necessary to consider different factors and use different leaching and enrichment recovery methods together to achieve the best recovery effect of precious metals.

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