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MICHAEL L, HAIR
Ammonium Ion Adsorption in Sintered Porous Glass. An Infrared Determination of Selectivity Constants
by Michael L. Hair1* Research and Development Laboratories, Corning Class Works, Corning, New York (Received July $8,1969)
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Infrared data are presented showing the adsorption of NH4+ into a sintered porous glass from aqueous solution. Effects due to the anions are discussed and the equilibrium constants K N ~ K KNH~K, , and K N B , N & are deterTined to be 2.06,2.95, and 1.43, respectively. The "pores" in the glass are estimated to be between 2.8 and 4.5 A in diameter.
Introduction
Results and Discussion
Previous work has shown that when porous glass is slowly sintered, its behavior as an ionic membrane changes drastically. lb Thus, though the original porous glass shows only slight selectivity for I
