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Science 7 August 1970:
Vol. 169. no. 3945, pp. 584 - 585
DOI: 10.1126/science.169.3945.584
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Articles

Ice Sandwich: Functional Semipermeable Membrane

R. D. Miller 1

1 Department of Agronomy, Cornell University, Ithaca, New York 14850

At a temperature slightly below the freezing point of an aqueous solution, the functions of a nearly perfect semipermeable membrane can be simulated with two nonselective filters with ice sandwiched between them. Potential applications include production of potable water from brackish sources or of highly purified water from tap water.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)