Saltwater purification using shock electrodialysis

This is from the Bazant Group in the ChemE Department at MIT! The science has been around for awhile, but it looks like the implementation is novel- the device contains two copper electrodes separated by a Nafion membrane and small, porous glass frits that allow for small ion movement. By applying a voltage across the membranes (say 1.5V), a salt depletion zone is formed at the cathode, and purified water is obtained. Particles as small as 50 nm can be filtered!

Shock electrodialysis for seawater separation


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