World’s first sun-powered thermal desalination tech extracts lithium

Researchers at the Australian National University (ANU) have developed an innovative sun-powered thermal desalination technology that significantly enhances lithium extraction from brine while offering a greener alternative to traditional methods. Building on their 2024 thermodiffusive desalination (TDD) technique—which keeps water in liquid form throughout the process—the team introduced a liquid Burgers cascade (LBC) system. This design improves performance by employing flow control, optimized heat distribution via U-shaped conductive boundaries, partial thermal insulation, and precise recovery tuning. These enhancements led to a nearly 40-fold increase in water recovery and energy efficiency compared to earlier single-channel setups, demonstrating reliable operation with real seawater from Australia’s coast. The LBC system’s membrane-free, all-liquid approach addresses key challenges in desalination and brine mining, such as high energy consumption, corrosion, and environmental impact. It enables efficient treatment of high-salinity brines common in desalination and oil and gas industries without using harmful chemicals. The researchers