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Recovery of Europium from E-Waste Using Redox Active Tetrathiotungstate Ligands

11 December 2023, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Rare-earth elements, indispensable to our modern economy, are challenging to purify due to their chemical similarities. Here we introduce a strategy to recycle europium from e-waste, leveraging the redox non-innocence of tetrathiotungstate ligands, achieving its selective separation from energy-saving lamps under ambient conditions with separation factors uover 1000 and recovery efficiency as high as 99%, without pre-treatment of the waste.

Keywords

Europium recycling
tetrathiotunsgtate
redox-non innocent ligand
Rare-earth element separation
internal-induced electron transfer

Supplementary materials

Title
Description
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Title
Supporting video
Description
Video illustrating the Eu extraction process from a compact fluorescent lamp
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Supplementary information
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Supplementary information
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Version History

Dec 11, 2023 Version 1

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The content is available under CC BY NC ND 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2023-jjx9l
D O I: 10.26434/chemrxiv-2023-jjx9l [opens in a new tab]

Funding

ETH Zurich
ETH 44 19 1

Author’s competing interest statement

M.P and V.M. declare that an application has been made for a provisional patent (European patent application number EP23306022) related to the subject matter of this manuscript. The remaining author declare no competing interests.

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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