Integrated CO2-facilitated Hydrometallurgical and Electrochemical Technology for Sustainable Mining and Recovery of Critical Elements from Wastes and Ashes
03/22/2021 - 07/31/2022
Project Innovation + Advantages:
Critical minerals—used in important defense and energy applications–are scarce. Municipal wastes are excellent candidates for domestic sources of high-grade ores due to their high metal concentration. Because the metals in wastes and waste ashes contain a wide range of impurities, however, conventional extraction processes are not effective. Columbia University will develop an innovative MIDAS process based on the integrated CO2-facilitated hydrometallurgical and electrochemical technology. The team will (1) develop supercritical CO2-based solvent systems for hydrometallurgical extraction of critical elements and metals from waste ashes, (2) explore electrochemical interfaces to refine the extracted metals, and (3) integrate both processes into an energy-efficient process.