(297e) Enhanced Lithium Selectivity in Brines Via Dual Functionalization of Silica Nanoparticles with Crown Ether and Chelating Agent

The growing need for lithium in energy storage applications requires the development of effective and focused extraction techniques, especially from unconventional sources like saline solutions and produced water. Conventional methods of recovery are severely hindered by the high salinity and low lithium concentration of these sources. By modifying silica with a crown ether with a high affinity for lithium and a silane-based chelating agent that improves ligand attachment and stability, we present a unique method for lithium recovery in this work. Enhancing lithium selectivity while maintaining robust silica surface functionalization is the goal of this dual modification approach. The new adsorbent is synthesized using an enhanced process that maximizes function-group attachment while maintaining surface stability. Characterization techniques like Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), Energy Dispersive X-ray Spectroscopy (EDS), and Zeta Potential analysis are used to confirm chemical modifications and assess the substance's characteristics. Adsorption experiments are used to evaluate the selectivity and recovery capacity of lithium in a multicomponent environment. In order to clarify lithium binding interactions with the modified silica, the study looks into the adsorption mechanism and thermodynamic characteristics. This study offers an effective technique for recovering lithium from brines that is both economical and ecologically friendly in comparison to traditional extraction techniques. With possible ramifications for battery-grade lithium production and sustainable resource management, the findings further the development of selective adsorbent technology.