Reverse osmosis (RO) is a filtration method that removes many types of large molecules and ions from solutions by applying pressure to the solution when it is on one side of a selective membrane. The result is that the solute is retained on the pressurized side of the membrane and the pure solvent is allowed to pass to the other side. To be "selective," this membrane should not allow large molecules or ions through the pores (holes), but should allow smaller components of the solution (such as the solvent) to pass freely.

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Israeli water purification device returns to Earth

By SHARON UDASIN

Atlantis’ tested out new system to avoid dumping water into space; device has already been installed in places with water purification challenges.

www.jpost.com

 
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