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Title (Primary) Green extractants in assisting recovery of REEs: A Case study
Author Kołodyńska, D.; Burdzy, K.; Hunger, S.; Aurich, A.; Ju, Y.
Journal Molecules
Year 2023
Department UBZ
Volume 28
Issue 3
Page From art. 965
Language englisch
Topic T7 Bioeconomy
Keywords rare earth; heavy metal ions; leaching; citric acid; tartaric acid; ethylenediaminedisuccinic acid
Abstract

The recycling of REEs from the end of life (EoL) products, such as nickel metal hydride batteries (NiMH), offers great opportunities for their supply in Europe. In the presented paper, the application of ‘green’ extractants such as citric (CA), metatartaric (TA), and ethylenediaminedisuccinic acid (EDDS) (also with H2O2 addition) for the recovery of REEs was studied. The studies were conducted considering the effects of the phase contact time, the initial concentration of CA, TA, and EDDS, as well as H2O2, pH, and temperature. It was found that the addition of TA to the CA solution meant that higher rates of metal ion binding and, thus, leaching was observed. The optimal conditions were obtained in the system: CA-TA and H2O2 for the concentration 0.6M-0.3 M-2%.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26918
Kołodyńska, D., Burdzy, K., Hunger, S., Aurich, A., Ju, Y. (2023):
Green extractants in assisting recovery of REEs: A Case study
Molecules 28 (3), art. 965