|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Rare Metal Extraction & Processing
||Selective separation of Co and Ni from REE in recycling
||Gulaim A. Seisenbaeva, Ani Vardanyan
|On-Site Speaker (Planned)
||Gulaim A. Seisenbaeva
A series of solid silica nanoparticles and mesoporous microparticles were prepared by sol-gel method. They were modified by specific organic functions bearing N- and S-donor ligands with enhanced affinity to late transition metals. The materials were characterized by TGA, SEM-EDS, AFM, XRD, FTIR and potentiometric titration. The adsorption kinetics and thermodynamics for Co(II) and Ni(II) cations was investigated. Selectivity of uptake for later transition metals in relation to rare earth elements was tested. Specific ligand setups were proposed for selective separation of Co(II) and Ni(II) cations from each other. The materials were evaluated for recycling of rare earth based magnets, using simulation solutions corresponding to leachate from FeNdB and SmCo magnets.