5:15 PM - 6:30 PM
[BPT05-P18] Chemical leaching of rare-earth elements from highly REY-rich mud with carbonated water
Keywords:REY-rich mud, Chemical leaching, Deep-sea mineral resources
Takaya et al. (2015) reported that the optimum conditions for chemical leaching of rare-earth elements from highly REY-rich mud with strong acid (HCl and H2SO4). The study shows that the apatite grains, the main host mineral of REY, dissolve easily in the diluted acid solution under room temperature. We have conducted the chemical leaching experiments with carbonated water which may enable to integrate the leaching and recovery processes (the recovery of rare-earth elements from the leaching solution as a carbonate minerals). Here, we explain the concept of this hydrometallurgical processes and report the preliminary results of our experiments.