The objective of this project is to develop and demonstrate bench-scale feasibility of a low-cost, low-energy water treatment process using non-aqueous solvents (NAS) for the economical extraction of clean water from high total dissolved solids (TDS) brines. TDS is a measure of the amount of dissolved matter in water and a reflection of the salinity—the energy required for separation increases with salinity. The high TDS levels in concentrated brines generated from CO₂ subsurface storage and fossil fuel extraction (often eight times higher than those of seawater) make the current state-of-the art approaches to water treatment and disposal, such as reverse osmosis (RO), untenable. Specific project objectives are to identify candidate solvents that can absorb water under one condition and release it under better conditions; test different solvents and/or mixtures of solvents for optimum water uptake and release to maximize water recovery from 180,000 parts per million TDS brine; develop optimum conditions to maximize the kinetics of the process; test water quality and, if necessary, develop a downstream process to satisfy potable water standards; and develop strategies to optimize the overall process and perform a techno-economic assessment for scale-up.