Monday, March 12, 2018

This Graphene Filter Makes Dirty Saltwater Drinkable

I sure hope this works.  Still today reverse osmosis is an energy hog.  Unless it's brackish water.  That's easier.  Just get it into mass production!

The filter uses Graphair, a type of graphene, a material made from a thin layer of pure carbon. A film made from the new version of the material, with microscopic nano-channels, has a “unique atomic structure where the channel only allows pure water molecules to pass through while rejecting all the bigger particles of contaminants,” says Dong Han Seo, a researcher at the Australian research organization CSIRO. Salt, oil, chemicals, and other pollutants are blocked by the filter, while water flows through.

Typical large desalination plants use reverse osmosis, an energy-hogging process that uses high-pressure pumps to force water through membranes. The graphene filter can be used with a different process called membrane distillation, which runs on a difference in temperature between the clean and dirty water.

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