Review: Biorecovery of precious metals from waste printed circuit boards

IF 4.9 2区工程技术 Q1 ENGINEERING, CHEMICAL

Minerals Engineering Pub Date : 2025-04-28 DOI:10.1016/j.mineng.2025.109306

Wuyi Ming , Shunchang Hu , Xiaofei Zhang , Jun Ma , Wenbin He , Yapeng Xu , Hongyan Wang , Yingjie Xu , Wenbo Xing , Zhijun Chen , Xiaoke Li

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Abstract

Presently, as electronic waste continues to surge, waste printed circuit boards (WPCBs) have emerged as one of the fastest-growing waste category. This causes severe environmental pollution and threats to human health. However, there are many precious metals in WPCBs. To achieve environmental conservation and sustainable development, adopting biorecovery techniques for the extraction/reuse of WPCBs has become a promising approach. Firstly, this review provided an overview of e-waste material categorization, pretreatment methods, and screening methods. Secondly, biorecovery was decomposed into two primary domains: bioleaching and biosorption, with detailed reviews conducted on the mechanisms and leaching yields of these two processes. Thirdly, a review of purification techniques for bioleaching solutions was conducted. Finally, a comprehensive comparison was conducted on the similarities and differences between bioleaching and biosorption. The maximum bioleaching leaching yields for Au, Ag, and Pt were approximately 76.6%, 90%, and 60%, respectively, while the maximum biosorption leaching yields for Au was approximately 100%. This review aims to establish a foundation for the application of biorecovery at an industrial scale.

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综述：废弃印刷电路板中贵金属的生物回收

目前，随着电子垃圾的持续激增，废弃印刷电路板（wpcb）已成为增长最快的废物类别之一。这造成了严重的环境污染，威胁到人类健康。然而，wpcb中含有许多贵金属。为了实现环境保护和可持续发展，采用生物回收技术提取/再利用wpcb已成为一种很有前途的方法。本文首先综述了电子垃圾的分类、预处理方法和筛选方法。其次，将生物回收分解为两个主要领域：生物浸出和生物吸附，并对这两个过程的机理和浸出率进行了详细的综述。第三，对生物浸出液的净化技术进行了综述。最后，综合比较了生物浸出与生物吸附的异同。Au、Ag和Pt的最大生物浸出率分别约为76.6%、90%和60%，Au的最大生物吸附浸出率约为100%。本文旨在为生物回收技术在工业上的应用奠定基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Minerals Engineering 工程技术-工程：化工

CiteScore

8.70

自引率

18.80%

发文量

519

审稿时长

81 days

期刊介绍： The purpose of the journal is to provide for the rapid publication of topical papers featuring the latest developments in the allied fields of mineral processing and extractive metallurgy. Its wide ranging coverage of research and practical (operating) topics includes physical separation methods, such as comminution, flotation concentration and dewatering, chemical methods such as bio-, hydro-, and electro-metallurgy, analytical techniques, process control, simulation and instrumentation, and mineralogical aspects of processing. Environmental issues, particularly those pertaining to sustainable development, will also be strongly covered.