A new process that cleans wastewater, generates electricity, and can remove 90 percent of salt from brackish water or seawater, was reported by an international team of researchers from China and the U.S.
Clean water for drinking, washing, and industrial uses is a scarce resource in some parts of the world. Its availability in the future will be even more problematic. Many locations already desalinate water using either a reverse osmosis process -- one that pushes water under high pressure through membranes that allow water to pass but not salt -- or an electrodialysis process that uses electricity to draw salt ions out of water through a membrane. Both methods require large amounts of energy.