Sustainable recovery of metals from e-waste using deep eutectic solvents: Advances, challenges, and perspectives

IF 9.3 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Current Opinion in Green and Sustainable Chemistry Pub Date : 2024-03-15 DOI:10.1016/j.cogsc.2024.100913

Mengwei Guo , Rongrong Deng , Mingyuan Gao , Cunying Xu , Qibo Zhang

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Abstract

The increasing emission of electronic waste (e-waste) accelerates the depletion of natural metal resources and raises growing concerns for human health and environmental sustainability. Herein, the valuable metal recovery driven by the development of a circular economy has increasingly become a focal point in research. Recovering metals from e-waste can rationally allocate resources and significantly alleviate environmental issues; however, it remains challenging. Deep eutectic solvents (DESs) provide an ideal alternative for these separation and recovery processes due to their green properties. This article reviews recent advances in the recovery of metals from e-waste using DESs, encompassing spent battery materials, printed circuit boards, lamp phosphor waste, and end-of-life permanent magnets. Recovery approaches involving redox/coordination leaching, solvent extraction, precipitation, and electrodeposition are discussed within the framework of DESs' unique solvent characteristics, eco-design principles, and technology features. Finally, challenges facing this emerging recovery technology are outlined while future prospects are also envisioned.

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利用深共晶溶剂从电子废物中可持续地回收金属：进展、挑战与展望

电子废弃物（e-waste）排放量的不断增加加速了天然金属资源的枯竭，并引发了对人类健康和环境可持续性的日益关注。因此，在循环经济发展的推动下，有价金属回收日益成为研究的焦点。从电子废弃物中回收金属可以合理分配资源，极大地缓解环境问题；然而，这项工作仍具有挑战性。深共晶溶剂（DES）因其绿色环保的特性，为这些分离和回收工艺提供了理想的替代品。本文回顾了利用 DESs 从电子废弃物中回收金属的最新进展，包括废电池材料、印刷电路板、灯管荧光粉废料和报废永磁体。在DES独特的溶剂特性、生态设计原则和技术特点的框架内，讨论了涉及氧化还原/配位浸出、溶剂萃取、沉淀和电沉积的回收方法。最后，概述了这一新兴回收技术所面临的挑战，并展望了未来前景。

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来源期刊

Current Opinion in Green and Sustainable Chemistry Chemical Engineering-Catalysis

CiteScore

16.00

自引率

2.20%

发文量

140

审稿时长

103 days

期刊介绍： The Current Opinion journals address the challenge specialists face in keeping up with the expanding information in their fields. In Current Opinion in Green and Sustainable Chemistry, experts present views on recent advances in a clear and readable form. The journal also provides evaluations of the most noteworthy papers, annotated by experts, from the extensive pool of original publications in Green and Sustainable Chemistry.