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Scientists have developed a new solar desalination system using laser-textured metal panels that converts seawater into drinking water without producing toxic brine waste. The system uses sunlight to evaporate water while automatically removing salt deposits from the working surface to prevent clogging. Testing with water from three different oceans demonstrated the ability to recover nearly all salts as solid materials, including potentially valuable lithium.
Why it matters
This technology could address two major challenges simultaneously: providing fresh water in water-scarce regions while eliminating the environmental problem of brine disposal that plagues conventional desalination plants. The recovery of solid salts, particularly lithium, could create an additional revenue stream and support battery production.
Understand the Science
Scientists have developed a solar desalination system that turns seawater into drinking water without creating environmentally damaging brine. Special laser-textured metal panels use sunlight to evaporate water while automatically moving salt deposits away from the working surface, preventing clogging. The process was successfully tested with water from three oceans and can recover nearly all salts as solids. Those leftover materials could even become a source of valuable lithium for batteries.
Source: New solar desalination breakthrough makes fresh water without toxic brine