Excerpt from Agricultural Science Review, Vol. 7: First Quarter, 1969
Reverse osmosis is a technique originally devel oped to purify sea water. In principle, it can be used to separate any substance in liquid or gaseous solu tion. Essentially, it involves the use of a porous membrane whose chemical nature can be made so that it has a preferential attraction for the solvent and a similar repulsion for the solute in a solution.
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