Adsorption of 2,4-Dichlorophenol from Aqueous Solution onto Microwave Modified Activated Carbon： Kinetics and Equilibrium

Batch experiments were conducted to investigate the adsorption of 2,4-dichlorophenol （2,4-DCP） onto microwave modified activated carbon （AC） at three different temperatures （303 K, 313 K and 323 K）. Adsorption isotherms, kinetics, and thermodynamics of the adsorption process were explored. Equilibri...

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Bibliographic Details
Published in:Transactions of Tianjin University 2009-12, Vol.15 (6), p.408-414
Main Author: 邹学权 万先凯 史惠祥 汪大翚
Format: Article
Language:English
Subjects:
Engineering
Freundlich方程
Humanities and Social Sciences
Langmuir模型
Mechanical Engineering
multidisciplinary
Science
二氯苯酚
动力学模型
吸附等温线
改性活性炭
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Summary:Batch experiments were conducted to investigate the adsorption of 2,4-dichlorophenol （2,4-DCP） onto microwave modified activated carbon （AC） at three different temperatures （303 K, 313 K and 323 K）. Adsorption isotherms, kinetics, and thermodynamics of the adsorption process were explored. Equilibrium data were fitted into Langmuir and Freundlich equations, and the result reveals that the Freundlich isotherm model fits better than the Langmuir model. Three simplified kinetic models： pseudo-first-order, pseudo-second-order, and intrapartiele diffusion equations were adopted to examine the mechanism of the adsorption process, and the pseudo-second-order kinetic model proved to be the best in describing the adsorption data. The thermodynamic parameters of the adsorption process were estimated, showing that the adsorption of 2,4-DCP was exothermic and spontaneous, and the adsorption studied in this paper can be assigned to a physisorption mechanism.
ISSN:1006-4982
1995-8196
DOI:10.1007/s12209-009-0071-9