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

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

doi:10.1016/j.hydromet.2025.106465

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Title

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

Authors

Magdalena Emmons-Burzyńska (WTCH) ^{[ 1 ][ 7.6 ][ P ]}
Eryk Jędrzejczak (WTCH) ^{[ 2 ][ 7.6 ][ SzD ]}
Adam Piasecki (WIMiFT) ^{[ 3 ][ 2.8 ][ P ]}
Łukasz Ławniczak (WTCH) ^{[ 1 ][ 7.6 ][ P ]}
Magdalena Regel-Rosocka (WTCH) ^{[ 1 ][ 7.6 ][ P ]}
Marcin Wysokowski (WTCH) ^{[ 1 ][ 7.6 ][ P ]}

^{[ 1 ]} Instytut Technologii i Inżynierii Chemicznej, Wydział Technologii Chemicznej, Politechnika Poznańska | ^{[ 2 ]} Wydział Technologii Chemicznej, Politechnika Poznańska | ^{[ 3 ]} Instytut Inżynierii Materiałowej, Wydział Inżynierii Materiałowej i Fizyki Technicznej, Politechnika Poznańska | ^{[ P ]} employee | ^{[ SzD ]} doctoral school student

Scientific discipline (Law 2.0)

[2.8] Materials engineering
[7.6] Chemical sciences

Year of publication

2025

Published in

Hydrometallurgy

Journal year: 2025 | Journal volume: vol. 234

Article type

scientific article

Publication language

english

Keywords

EN

Natural deep eutectic solvents
Metals recovery
Electronic waste
Lactic acid
Sustainability

Abstract

EN 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.

Date of online publication

04.03.2025

Pages (from - to)

106465-1 - 106465-10

DOI

10.1016/j.hydromet.2025.106465

URL

https://www.sciencedirect.com/science/article/pii/S0304386X25000301?dgcid=author

Comments

Article number: 106465

Ministry points / journal

140