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Enhancing green recovery of Nd and Fe using TGA–ChCl DES and vermiculite: sustainable leaching of NdFeB magnets with deep eutectic solvents (DES)

Abel Thekeparampil Varghese, Anjana Das

2025ensustainabilityneodymiumrecoverysolventsleaching

Abstract

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The critical role of NdFeB permanent magnets in the digital electronics and renewable energy sectors underscores the necessity for sustainable recovery methods for Neodymium (Nd). Traditional recovery techniques, predominantly reliant on solvent extraction, face drawbacks including high energy demands, extensive chemical use, and significant secondary organic waste generation. This study presents an innovative methodology employing Thioglycolic Acid and Choline chloride (TGA-ChCl) to synthesize deep eutectic solvents (DESs) for the leaching of Nd from spent NdFeB magnets. Vermiculite is introduced as an adsorbent in the subsequent recovery process. Key analyses, such as FTIR, confirm the formation of DES and its effectiveness in leaching, while NMR spectroscopy highlights the aliphatic hydrocarbon presence within DES. XRD and SEM analyses detail the crystallinity and structural characteristics of the materials involved.

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Cite This Work

@article{29daafce-a71d-471f-88d6-347a7b8ec872,
  title={Enhancing green recovery of Nd and Fe using TGA–ChCl DES and vermiculite: sustainable leaching of NdFeB magnets with deep eutectic solvents (DES)},
  author={Abel Thekeparampil Varghese and Anjana Das},
  year={2025},
  language={en}
}
TY  - JOUR
TI  - Enhancing green recovery of Nd and Fe using TGA–ChCl DES and vermiculite: sustainable leaching of NdFeB magnets with deep eutectic solvents (DES)
AU  - Abel Thekeparampil Varghese
AU  - Anjana Das
PY  - 2025
LA  - en
ER  -

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