|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Environmentally friendly solid phase extraction of critical materials and REE from unconventional sources
||Athanasios Karamalidis, Jonathan Callura, Madhav Patel
|On-Site Speaker (Planned)
Critical materials, including rare earth elements (REE), are a group of valuable minerals with growing demand and supply chain concerns. Traditional sources of critical materials require significant capital investment and their refinement has caused widespread environmental contamination. Critical materials are also frequently present in secondary sources, such as brine water and industrial wastes. This work investigated the REE adsorption performance of polymer resins functionalized with phosphonate-based ligands. In multi-element competitive adsorption experiments the functionalized resins were highly selective, with REE separation factors up to two orders of magnitude higher than non-functionalized resins. Resin performance was also measured in fixed-bed adsorption columns to identify the impact of influent metal concentrations and flow rate on REE breakthrough. This work demonstrates the potential of these novel functionalized adsorbents for REE recovery from unconventional sources which can be used to augment existing REE supplies and offset environmentally harmful production methods.