Ku. Goss, CONCEPTUAL-MODEL FOR THE ADSORPTION OF ORGANIC-COMPOUNDS FROM THE GAS-PHASE TO LIQUID AND SOLID-SURFACES, Environmental science & technology, 31(12), 1997, pp. 3600-3605
Adsorption of organic pollutants from the gas phase to ambient surface
s has a great impact on the environmental mobility of these compounds.
In a recent paper, gas phase adsorption coefficients for different co
mpounds and surfaces have successfully been predicted based on thermod
ynamic parameters (surface free energies) without the use of any empir
ical fitting. However, the surface free energies required for these ca
lculations are only known for a limited number of adsorbates and surfa
ces, these parameters can be substituted by others (in p(L)(o), beta,
and alpha) that are tabulated for a wide range of compounds. Validatio
n of this extended model with experimental data shows good results. At
the same time, the conceptual understanding of the adsorption equilib
rium in terms of van der Waals and Lewis acid-base (electron donor-acc
eptor) interactions, which is provided by the original model, remains
unaltered. This paper is concluded by a discussion of our current know
ledge of the surface parameters that are additionally required for the
calculations.