Fig. 1: DME-FC apparatus and process schematic.
a Schematic depicting the experimental apparatus whereby DME gas is sparged into an aqueous solution at elevated pressure, permitting dissolution of DME into the liquid. Reaction temperature is controlled via a water bath, recirculation is carried out through a gear pump, and crystallization of metal salts occurs on the nucleation scaffold. b Photograph of the experimental apparatus during treatment of the Sm-Co leachate. c Process schematic depicting the DME-FC solid-liquid separation followed by a gas-liquid separation to recover and reuse DME with high efficiency. d Photograph of the experimental apparatus after FC of CoSO4 from the leachate, showing the visible change in CoSO4 concentration concurrent with crystal growth on the nucleation scaffold.
