Separation and concentration of rare earth elements from wastewater using electrodialysis technology
Li, Changbai; Ramasamy, Deepika; Sillanpää, Mika; Repo, Eveliina (2020-08-29)
Publishers version
Li, Changbai
Ramasamy, Deepika
Sillanpää, Mika
Repo, Eveliina
29.08.2020
Separation and Purification Technology
254
Elsevier
School of Engineering Science
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2020100983617
https://urn.fi/URN:NBN:fi-fe2020100983617
Tiivistelmä
Rare earth elements (REEs) including Scandium (Sc) are critical raw materials which are greatly needed in the advancement of many modern technologies. Due to the problems associated with the primary extraction of mining ores, the procurement of Sc and REEs from the secondary resources are currently explored adopting the principle of sustainability and circular economy. Herein, for the first time, the Electrodialysis (ED) technology based on electrochemical membrane separation process is successfully applied to separate and concentrate REEs from the diluted aqueous system. The overall performance of ED process in the recovery of Sc3+ ions from the wastewater was assessed by applied current, voltage, feed concentration, feed pH, co-ion competition and the overall energy consumption of the process. The REE recovery using the ED process was subjected to systematic investigations using both chronopotentiometric and chronoamperometric analyses. The results showed that ED process could be very promising in the recovery of Sc3+ ions (~99.52% removal) from the diluted wastewater, consuming the energy of only 0.26 kWh/m3 when operated at constant voltage mode (Sc3+ concentration of 20 ppm, pH 4, 1 h).
Lähdeviite
Li, C., Ramasamy, D. L., Sillanpää, M., & Repo, E. (2021). Separation and concentration of rare earth elements from wastewater using electrodialysis technology. Separation and Purification Technology, vol. 254, 117442.
Alkuperäinen verkko-osoite
https://www.sciencedirect.com/science/article/pii/S138358662031916XKokoelmat
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