Abstract
It was hypothesized that the mineral surfaces in a sandy aquifer material would be sufficiently hydrated in a GC column fed with humidified carrier gas to provide an airwater interface for the sorption of nonpolar organic vapors. To test this, the properties of three sorbents were investigated: an aquifer material, an oxidized version of the aquifer material, and a soil then from the vadose zore overlying the aquifer. Isotherms, vapor-phase sorption constants, partial molar enthalpies of sorption, and the incremental free energy of sorption for a methylere group were measured using a variety of volatile organic compounds
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