Collect. Czech. Chem. Commun. 1987, 52, 572-581

Adsorption of organics on thermally treated solids obtained from colloidal silica

Miroslav M. Kopečnia, Slobodan K. Milonjica, Wladyslaw Rudzinskib and Jacek Jagiellob

a Chemical Dynamics Laboratory, The Boris Kidrič Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade, Yugoslavia
b Maria Curie-Sklodowska University, Institute of Chemistry, Department of Theoretical Chemistry, Lublin, 20-031, Poland


Adsorption isotherms of three adsorbates on the solid beads obtained from colloidal silica were determined by means of gas chromatography at low surface coverages, when lateral interactions between the adsorbed molecules are negligible. The influence of thermal pretreatment on the adsorption properties of the solids was investigated in the temperature range from 343 to 423 K, while the solids were heated between 523 K and 1 223 K. The thermodynamic parameters of adsorption have been determined and used to discuss the adsorbate-adsorbent interactions.