Researchers at the University of Rochester have developed an innovative solar-powered desalination technology that produces clean drinking water without the use of chemicals or generating harmful wastewater. The system uses specially engineered black metal solar panels with laser-patterned surfaces to evaporate water in ultra-thin layers, leaving salts behind for easy collection. Unlike conventional desalination methods that discharge highly concentrated brine into marine ecosystems, this approach enables the recovery of solid minerals. The technology has also demonstrated the ability to extract approximately 50% of the lithium from water samples taken from the Great Salt Lake, highlighting its potential as an environmentally friendly solution for critical mineral recovery.
Conventional desalination technologies, particularly reverse osmosis, consume large amounts of energy and generate highly saline wastewater that threatens marine ecosystems by reducing oxygen levels and disrupting aquatic life. The new system developed by researchers at the University of Rochester overcomes these limitations through an innovative physical process. Laser-etched surface structures guide water to evaporate efficiently while directing salt crystals toward the edges of the panels, allowing the system to continuously self-clean and prevent clogging without chemical treatment.
Led by Professor Chunlei Guo, the research team successfully tested the technology using seawater samples collected from the Atlantic, Pacific, and Indian Oceans. One of the most significant breakthroughs is the system’s ability to recover lithium using hydrogen titanate nanoparticles integrated into specially designed metal channels. Tests conducted with water from the Great Salt Lake demonstrated that nearly half of the dissolved lithium could be successfully extracted during the desalination process.
The technology presents a sustainable alternative to conventional mining and desalination methods, both of which are resource-intensive and environmentally challenging. In addition to producing clean freshwater, the process recovers valuable materials such as table salt and critical minerals, transforming what would otherwise become waste into economically useful resources. Although the technology is still under development, it has the potential to address global water scarcity while strengthening sustainable supply chains for strategic minerals.
Source: Solarbaba – In Turkish
