Effect of operating conditions on the flux recovery of lithium from geothermal brine using forward osmosis

Along with the development of battery technology, the demand for lithium has increased, but the availability of lithium from primary ore, the pegmatite, has continued to decline. One of the alternatives is lithium extraction from brines. The process of lithium recovery from geothermal brine can be carried out using forward osmosis. In this research, experiments will be carried out in the laboratory using crossflow module to observe the effect of temperature and concentration on the resulting flux. The brine geothermal feed was synthesized by mixing NaCl, KCl, LiCl, CaCl₂, and MgCl₂. The concentration of draw solution was varied, namely 5, 2, and 1M, while the temperature was varied with values of 42, 36, and 30°C. The optimum conditions were obtained at a temperature of 42°C and a concentration of 5M with a maximum flux of 38.16 LMH.