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Soil Science Society of America Journal Abstract -

Nitric Oxide Adsorption by Clay Minerals1


This article in SSSAJ

  1. Vol. 29 No. 5, p. 514-519
    Received: Dec 21, 1964
    Accepted: Feb 11, 1965

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  1. M. M. Mortland2



Nitric oxide was found to be chemically adsorbed on mont-morillonite and nontronite when the exchange complex was saturated with certain transition metal ions. Infrared data showed a number of reactions depending on the nature of the saturating ion including: (i) coordination of NO as the mono or dinitrosyl complex; (ii) formation of N2O; (iii) formation of (NO)+. The NO molecule was able to penetrate the interlamellar regions of Co-montmorillonite or Co-nontronite. On all other systems, apparently only surface adsorption occurred. When air was admitted, all surface-adsorbed NO was immediately oxidized, but interlamellar NO decreased at a rate apparently dependent upon the diffusion of NO to the clay mineral surface. A produce of oxidation was found to be coordinated nitrite.

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