Title: Stripping of Fe(III) from Aliquat 336 by NaH<sub>2</sub>PO<sub>4</sub>: implication for rare-earth elements recovery from red mud
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.
Publication Year: 2020
Publication Date: 2020-01-10
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 13
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