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Main Title Impact of Oxygen Mediated Oxidative Coupling on Adsorption Kinetics.
Author Vidic, R. D. ; Suidan, M. T. ; Brenner., R. C. ;
CORP Author Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab. ;Cincinnati Univ., OH. ;Pittsburgh Univ., PA.
Publisher c1994
Year Published 1994
Report Number EPA/600/J-94/136;
Stock Number PB94-159407
Additional Subjects Oxygenation ; Polymerization ; Phenols ; Adsorption ; Water pollution control ; Reprint ; Reaction kinetics ; Surface chemistry ; Diffusion ; Activated carbon treatment ; Granular activated carbon treatment ;
Library Call Number Additional Info Location Last
NTIS  PB94-159407 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
Abstract The presence of molecular oxygen in the test environment promotes oxidative coupling (polymer formation) of phenolic compounds on the surface of granular activated carbon (GAC). Both adsorption equilibria and adsorption kinetics are affected by these chemical reactions. Lack of molecular oxygen interference with adsorption kinetics during the initial phase (first 12 h) of adsorbent-adsorbate contact, observed for the experimental conditions tested, can be explained by the lower rate of adsorbate polymerization when compared to the rate of pure adsorption. The homogeneous surface diffusion model (HSDM) adequately describes adsorption kinetics under anoxic conditions, but it fails to accurately predict experimental data collected in the presence of molecular oxygen. For the experimental conditions tested in the study, GAC particle size did not influence the magnitude of the surface diffusion coefficient. However, the increase in the initial adsorbate concentration yielded an increase in the surface diffusion coefficient. This may be attributed to a decrease in the adsorption forces for higher surface coverage.
Supplementary Notes Pub. in Water Research, v28 n2 p263-268 1994. Prepared in cooperation with Cincinnati Univ., OH. and Pittsburgh Univ., PA.
NTIS Title Notes Journal article 1990-93.
Title Annotations Reprint: Impact of Oxygen Mediated Oxidative Coupling on Adsorption Kinetics.
Category Codes 68D; 99C; 99F
NTIS Prices PC A02/MF A01
Primary Description 600/14
Document Type NT
Cataloging Source NTIS/MT
Control Number 414726863
Origin NTIS
Type CAT