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Stripping of Fe(III) from Aliquat 336 by NaH2PO4: implication for rare-earth elements recovery from red mud.
- Source :
-
Separation Science & Technology . 2021, Vol. 56 Issue 2, p301-309. 9p. - Publication Year :
- 2021
-
Abstract
- A new approach was developed using NaH2PO4 as the stripping agent for Fe stripping from Fe-loaded Aliquat 336 during rare-earth elements recovery from red mud leachate. Owing to the strong coordination between Fe3+ and H2PO4‒, Fe mainly exists as FeH2PO42+ at [H2PO4‒] higher than 0.5 M, which can be readily stripped. The results showed a maximum Fe stripping efficiency of 95.5% under optimal condition. Moreover, the extraction capacity of the extractant after stripping was comparable to that of fresh extractant, and decreased only by 2% after 6 cycles, indicating the robustness of this approach for Fe stripping and extractant regeneration. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MUD
*RARE earth metals
*LEACHATE
*SOLVENT extraction
Subjects
Details
- Language :
- English
- ISSN :
- 01496395
- Volume :
- 56
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Separation Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 148165050
- Full Text :
- https://doi.org/10.1080/01496395.2020.1713814