Desalination by Osmosis-Reverse Osmosis Couple

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Science  22 Mar 1968:
Vol. 159, Issue 3821, pp. 1364-1365
DOI: 10.1126/science.159.3821.1364


Water is separated from brines by a semipermeable membrane. Water flows by osmosis across the membrane into a sealed chamber where it creates pressure. This pressure is transmitted by a water-immiscible liquid piston to a second chamber where it effects reverse osmosis. Water-removal rates are calculated.