About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Recycling and Environmental Technologies
|
| Presentation Title |
Separation of rare earth elements by electrodialysis with complexation reaction |
| Author(s) |
Amilton Barbosa Botelho Junior, Patrick De Oliveira Wecchi, Denise Crocce Romano Espinosa |
| On-Site Speaker (Planned) |
Amilton Barbosa Botelho Junior |
| Abstract Scope |
Separation of rare earth elements is challenging due to their similar properties. Novel separation methods are important, including membrane-based electrochemical separation. Thus, the objective of the present study is to investigate electrodialysis with various complexing agents. The elements studied were La, Nd, and Y (0.01 mol/L), and effect of acid solution (HNO3 and H2SO4) was evaluated in bielementary and multielementary systems. The pH was investigated from 0.5 to 2.0. Ion transport, separation efficiency/selectivity, and energy consumption were evaluated for the use of EDTA and citric acid as complexing agents. Higher separation efficiency was observed at pH 2.0 due to lower competition with H⁺ ions. Complexation was less effective due to sulfate ions interference. The complexing agent reduces the flux of metallic ions because of the increasing size of the species, which makes it harder to pass through the membrane pores and alters the charge, preventing electrostatic attraction. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Electrometallurgy, Hydrometallurgy, Sustainability |