Lithium extraction from geothermal brines is an innovative, sustainable method that recovers lithium from naturally occurring hot, mineral-rich fluids in geothermal reservoirs, minimizing environmental impact (Mining Technology, 2024). This process leverages existing geothermal energy operations to produce lithium for batteries.
Geothermal brines, found in regions like the Salton Sea, California, contain dissolved lithium at concentrations up to 400 ppm (USGS, 2023). The extraction begins with pumping brine to the surface for geothermal power generation. After energy extraction, the lithium-rich brine is processed using advanced separation techniques (ScienceDirect, 2024).
The extracted lithium is then purified into battery-grade lithium carbonate or hydroxide through precipitation or electrolysis, ready for EV battery production (Mining Technology, 2024). The depleted brine is reinjected into the reservoir, maintaining the geothermal system and reducing waste (USGS, 2023). This closed-loop process cuts water use and land disturbance compared to traditional hard-rock mining or evaporation ponds (ScienceDirect, 2024).
Benefits include lower carbon emissions, with some projects achieving near-zero net emissions by using geothermal energy (Cornwall Insight, 2024). This method is key to sustainable lithium supply.
How do you see geothermal brine extraction shaping lithium production in the industry? Share your insights!
