Nanoscale electrodes separate salt from seawater. It uses special electrodes:
"It first draws ions from seawater into a pair of electrodes. As the researchers pass current through the electrodes, electrochemical reactions drive chloride ions into a silver electrode and sodium ions to an electrode made from manganese oxide nanorods. Next, the researchers remove the desalinated water and release the trapped ions into a separate stream of waste seawater by reversing the direction of the electrical current."
And at this point the salt in the water is only reduced by about 50%.
posted by aleph
on Feb 11, 2012 -