Osmosis membranes are special layers of material that allow water to pass through while blocking other substances. They are used to purify water by filtering out impurities and salts, making it safe to drink. Full definition
The high - capacity filters include a sediment filter, two ten - inch carbon block filters, a FILMTEC reverse osmosis membrane from Dow Chemical, and a refining carbon filter before the water enters the holding tank. (geekwrapped.com)
The fourth stage introduces a reverse osmosis membrane produced by Dow Chemical, which removes up to 99 % of total dissolved solids, including contaminants, bacteria, and viruses. (geekwrapped.com)
From there, the still - salty water is sucked through reverse - osmosis membranes permeable to water molecules but not salt ions. (discovermagazine.com)