Tech Xplore  July 7, 2020 Considerable quantities of the element lithium are deeply hidden in rock formations below the Upper Rhine Trench: dissolved in salty thermal water reservoirs. Chile, Argentina, and Australia account for more than 80 percent of global production. Researchers in Germany have developed an environmentally friendly process to extract lithium from the existing infrastructure of geothermal plants, through which up to two billion liters of thermal water flow every year. There can be up to 200 milligrams per liter. The process involves filtering out the lithium ions from the thermal water and concentrated until lithium can be […]