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Abstrakt
Recovery of rare-earth elements (REEs) from spent NdFeB magnets is receiving great attention because of high amount of neodymium and potential risk of environmental pollution. In this study, a novel environment-friendly hydrometallurgical route is proposed for efficient recovery of REEs during electrochemical leaching with sulfuric and oxalic acids. With proper adjustment of the electrolyte composition and operating conditions, effective separation of different elements is observed; a compact layer of REE oxalates in a purity of up to 93% is obtained on the cathode, while iron remains in the solution and as solid residue for further recovery. The mechanisms during the electro-leaching process were subsequently investigated and we propose that cathodic deposition of the REEs is due to electrostatic attraction of the REE-oxalate particles on the cathode. With this finding, selective recovery of REEs from spent magnets can be achieved. This study provides a new insight on electronic waste recycling by implementing principles of electrochemistry.
Cytowania
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2 7
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0
Web of Science
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2 7
Scopus
Autorzy (7)
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Irina Makarova
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Zhi Sun
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Irina Kurilo Prof.
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Markku Laatikainen
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Eveliina Repo
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- Wersja publikacji
- Accepted albo Published Version
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
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SEPARATION AND PURIFICATION TECHNOLOGY
nr 251,
ISSN: 1383-5866 - Język:
- angielski
- Rok wydania:
- 2020
- Opis bibliograficzny:
- Makarova I., Ryl J., Sun Z., Kurilo I., Górnicka K., Laatikainen M., Repo E.: One-step recovery of REE oxalates in electro-leaching of spent NdFeB magnets// SEPARATION AND PURIFICATION TECHNOLOGY -Vol. 251, (2020), s.117362-
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.seppur.2020.117362
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 131 razy
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