|About this Abstract
||Part C-3: Processing of Critical Metals
||REE recovery from the fern D. dichotoma by acid oxalic precipitation after direct leaching with EDTA
||Baptiste Laubie, Zeinab Chour, Ye-Tao Tang, Jean Louis Morel, Marie-Odile Simonnot, Laurence Muhr
|On-Site Speaker (Planned)
The fern Dichranopteris dichotoma is a rare earth elements (REEs) hyperaccumulator, which naturally grows on former mine tailings in China. It accumulates up to 0.35% of REEs in its aerial parts. Different hydrometallurgical processes were developed to recover these elements directly from the biomass or from ashes after combustion. The first process consists in using a resin to enhance the extraction and to purify REEs by several elution steps. A solution with 75% of the REEs at 81% purity is finally obtained, with aluminium as the main impurity. For the second process, selective extractions of REEs from ashes are performed by different leaching steps. In that case, aluminium is isolated. The upscaling of these processes will allow the agromining development to recover REEs from secondary ressources.
||Planned: At-meeting proceedings