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Title:Reduction of aqueous free chlorine with granular activated carbon
Author(s):Suidan, Makram T.; Snoeyink, Vernon L.
Contributor(s):University of Illinois at Urbana-Champaign
Subject(s):Water resources development
Water resources development--Illinois
Drinking water treatment
Mathernatical model
Pore diffusion
Packed bed model
Geographic Coverage:Illinois (state)
Abstract:A surface reaction rate expression was developed to describe the heterogeneous reaction between aqueous free chlorine and granular activated carbon. This expression was then incorporated into a pore diffusion model and the relevant partial differential equations with the corresponding boundary conditions were solved for the case of (1) a constant concentration batch reactor and (2) a closed batch reactor. The solutions were then compared to similar batch data in order to evaluate the pore model constants. A packed bed reactor model was then solved using the rate information from the batch mathematical models and experimental data. The predicted results from the packed bed model were then compared to experimental results which were collected using applicable conditions. The effect of particle size on the rate of removal of free chlorine was investigated both in batch and packed bed column form. The effect of pH on the rate of reaction was studied in the pH range of 4-10. It was found that the pH only affects the rate insofar as it affects the distribution of free chlorine between OCl¯ and HOCl. Temperature effects were also studied in the range 2°-35°C. The effect of temperature on the surface dissociation rate constant was found to correspond to the Arrhenius law.
Issue Date:1975-08
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Genre:Report (Grant or Annual)
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright 1975 held by Makram T. Suidan, Vernon L. Snoeyink
Date Available in IDEALS:2016-04-25

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