Competitive Adsorption of Phenols on GAC. II: Adsorption Dynamics under Anoxic Conditions
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VIEW THE ORIGINAL ARTICLEPublication: Journal of Environmental Engineering
Volume 119, Issue 6
Abstract
The impact of the presence of molecular oxygen in the test environment is further evaluated for adsorption behavior of a mixture of phenolic compounds on fixed‐bed GAC adsorbers. Adsorption breakthrough curves are obtained for the single‐solute system phenol, o‐cresol, and 3‐ethylphenol; the binary solute system of phenol and o‐cresol; and the ternary solute system of phenol, o‐cresol, and 3‐ethylphenol. The plug‐flow homogeneous surface diffusion model is evaluated as a predictor of adsorber performance for these systems. The binary and ternary solute calculations of the model are performed using kinetic parameters determined for the single‐solute system. The ideal adsorbed solution theory is used to describe the equilibrium on the surface of the adsorbent particle. The model predictions for the single‐solute system agree very well with the experimental breakthrough curves conducted under anoxic conditions, with exceptions to the later portion of the o‐cresol breakthrough, where tailing of the experimental breakthrough has been noticed due to the presence of limited concentrations of dissolved oxygen in the feed. The model predictions for the binary and ternary solute systems agree well with the experimental data collected under anoxic conditions.
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Published In
Journal of Environmental Engineering
Volume 119 • Issue 6 • November 1993
Pages: 1044 - 1057
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Apr 29, 1992
Published online: Nov 1, 1993
Published in print: Nov 1993
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