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Old 02-21-2017, 08:53 PM   #2 (permalink)
freebeard
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Or, a flow battery in the usual sense with a free source of electrolyte?

Here's a Potland, OR high school kid showing how to desalinate seawater:

Portland teen discovers cost-effective way to turn salt water in - KPTV - FOX 12

Quote:
By experimenting with a highly absorbent polymer, the teen discovered a cost effective way to remove salt from ocean water and turn it into fresh water.

"It's not bonding with water molecules, it's bonding to the salt," said Karamchedu.
....
"People were concentrated on that 10 percent of water that's bonded to the salt in the sea and no one looked at the 90 percent that was free. Chai just looked at it and said if 10 percent is bonded and 90 percent is free, then why are we so focused on this 10 percent, let's ignore it and focus on the 90."

It's a breakthrough that's estimated to impact millions of lives if ever implemented on a mass scale.
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