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Equilibrium adsorption of chlorophenols on granular activated carbon
The adsorption of chlorinated phenols from aqueous solution on granular activated carbon was studied in batch reactors. Single‐component equilibrium adsorption data for the eight compounds in two concentration ranges at pH 7.0 and 30°C were fit well by both the Langmuir and the Freundlich equations. The adsorptive capacities at pH 7.0 increase from pentachlorophenol to trichlorophenols and are fairly constant from trichlorophenols to monochlorophenols. Equilibrium measurements were also conducted for 2,4,5‐trichlorophenol, 2,4‐dichlorophenol, and 4‐chlorophenol over a wide pH range. A surface complexation model has been proposed to describe the effect of pH on adsorption equilibria of chlorophenols on activated carbon. Activated carbon surface functional sites are divided into acidic and basic groups with which molecular and ionized forms of chlorophenols interact, respectively, and form two neutral complexes. The simulations of the model are in excellent agreement with the experimental data.
Equilibrium adsorption of chlorophenols on granular activated carbon
The adsorption of chlorinated phenols from aqueous solution on granular activated carbon was studied in batch reactors. Single‐component equilibrium adsorption data for the eight compounds in two concentration ranges at pH 7.0 and 30°C were fit well by both the Langmuir and the Freundlich equations. The adsorptive capacities at pH 7.0 increase from pentachlorophenol to trichlorophenols and are fairly constant from trichlorophenols to monochlorophenols. Equilibrium measurements were also conducted for 2,4,5‐trichlorophenol, 2,4‐dichlorophenol, and 4‐chlorophenol over a wide pH range. A surface complexation model has been proposed to describe the effect of pH on adsorption equilibria of chlorophenols on activated carbon. Activated carbon surface functional sites are divided into acidic and basic groups with which molecular and ionized forms of chlorophenols interact, respectively, and form two neutral complexes. The simulations of the model are in excellent agreement with the experimental data.
Equilibrium adsorption of chlorophenols on granular activated carbon
Nelson, Peter O. (author) / Yang, Maoyu (author)
Water Environment Research ; 67 ; 892-898
1995-09-01
7 pages
Article (Journal)
Electronic Resource
English
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