Innovative method for the extraction of lithium, rubidium and cesium from lepidolite
Research Poster Engineering 2025 Graduate ExhibitionPresentation by Chandima Hevapathiranage
Exhibition Number 43
Abstract
Lithium (Li), rubidium (Rb), and cesium (Cs) are critical elements in modern technology, playing essential roles in energy storage, electronics, and specialty glasses. This paper investigates the extraction of lithium (Li), rubidium (Rb), and cesium (Cs) from lepidolite ore using a novel process by eliminating the need for existing high temperature processes. Thermodynamic modeling for both roasting and leaching was conducted using FactSage and HSC software. Thermal analysis and X-ray diffraction of the feed material and solid residues confirmed the theoretical calculations. The optimal conditions resulted in the extraction of 66 ± 5.08% Li, 97 ± 1.30% Cs, and 98 ± 2.61% Rb. The solution chemistry was studied using Pourbaix diagrams, and the products were characterized through Inductively Coupled Plasma (ICP) technology, X-ray diffractometry (XRD), Thermogravimetry (TGA), and Scanning Electron Microscopy (SEM) coupled with Energy Dispersive X-ray Spectroscopy (EDX).
Importance
This study introduces an innovative method for extracting lithium, rubidium, and cesium from lepidolite ore without the need for high-temperature processes, which are typically energy-intensive and costly. These elements are vital for producing batteries, electronics, and specialty glass, all of which are critical to modern technology and renewable energy solutions. By optimizing the extraction process, the research enhances resource efficiency and reduces environmental impact, contributing to sustainable development. Advanced techniques like thermodynamic modeling and material characterization were used to ensure accuracy and reliability. The findings provide a more efficient pathway for obtaining these essential materials, paving the way for improved technologies in energy storage and electronics while promoting greener industrial practices.
DEI Statement
This research contributes to diversity, equity, and inclusion by addressing the critical need for sustainable and accessible extraction methods for lithium, rubidium, and cesium-elements vital for renewable energy technologies and modern electronics. By eliminating high-temperature processes, this study reduces the environmental and economic barriers associated with traditional extraction methods, making these technologies more accessible to underserved regions and populations. The work also highlights the importance of resource efficiency and environmental justice, particularly for communities affected by mining activities. By advancing sustainable practices, this research supports equitable access to critical materials, fostering global inclusion in the transition to clean energy and technology-driven solutions.