Development of membranes based on metalorganic frameworks (MOFs) for extraction of metals and critical raw materials from mine waste

As research into metal–organic frameworks (MOFs) enters its third decade, efforts are naturally shifting from fundamental studies to some applications in different subject in environmental and recycling, utilizing the unique features of these materials. Engineered forms of MOFs, such as membranes and films, are being investigated to transform laboratory-synthesized MOF powders to industrially viable products for separations, chemical sensors and catalysts. Following encouraging demonstrations of gas separations using MOF-based membranes, liquid-phase separations will be explored as an effort to build effective membranes for separation of critical materials from waste mining solution in contrast to liquid-liquid separation such as solvent extraction. In this project proposal, we highlight MOF applications In recovery of metallic ions from mining waste waters and flotations tailings, specifically liquid-phase separations using MOF-based mixed-matrix membranes. The synthesis of these MOF-materials using hydrothermal reactors and ultrasonic spray pyrolysis and hydrogen reduction will be used in order to achieve high effective powder with controlled morphology, particle size and their chemical composition. We also highlight the analytical techniques that provide important insights into these materials, particularly at surfaces and interfaces, to better understand MOFs and their interactions with other materials, which will ultimately lead to their use in advanced technologies.