Leaching of metals from electronic waste using carboxylic acid-based deep eutectic solvents: Preliminary laboratory studies and molecular modelling

IF 4.8 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Hydrometallurgy Pub Date : 2025-03-04 DOI:10.1016/j.hydromet.2025.106465

Magdalena Emmons-Burzyńska , Eryk Jędrzejczak , Adam Piasecki , Łukasz Ławniczak , Magdalena Regel-Rosocka , Marcin Wysokowski

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Abstract

This research explores the intricate chemistry of deep eutectic solvents (DESs), particularly those formed with carboxylic acids and choline chloride, highlighting their effectiveness in metal leaching and the potential for sustainable recovery of valuable materials from electronic waste. The utilization of DESs in this context demonstrates a promising avenue for advancing eco-friendly methods in the treatment of electronic waste, contributing to both resource recovery and environmental management. It has been found that especially natural eutectic solvents, with lactic acid as the hydrogen bond donor, could provide a green alternative to conventional methods of processing electronic waste and recovery of strategically important metals, which remain crucial in order to meet the demand of the exponentially increasing electronics production. Lactic acid-based DES (Lac-DES) showed higher selectivity in Cu leaching over Ag, compared to other DESs, while oxalic acid-based DES (Ox-DES), surprisingly, appeared to leach selectively only silver (up to 40%) in the presence of H₂O₂.

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来源期刊

Hydrometallurgy 工程技术-冶金工程

CiteScore

9.50

自引率

6.40%

发文量

144

审稿时长

3.4 months

期刊介绍： Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures; separation of solids from leach liquors; removal of impurities and recovery of metal values by precipitation, ion exchange, solvent extraction, gaseous reduction, cementation, electro-winning and electro-refining; pre-treatment of ores by roasting or chemical treatments such as halogenation or reduction; recycling of reagents and treatment of effluents.