Kinetics and Thermodynamics of Adsorption of Phenolonto Mesoporous Carbon CMK-3

Chem. J. Chinese Universities

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Kinetics and Thermodynamics of Adsorption of Phenolonto Mesoporous Carbon CMK-3

GUO Zhuo¹, YUAN Yue²

1. School of Materials Science and Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, China;
2. School, Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China

Received:2006-08-25 Revised:1900-01-01 Online:2007-02-10 Published:2007-02-10
Contact: GUO Zhuo

Abstract

Abstract:

Mesoporous carbon CMK-3 was used to adsorb phenol from water by comparing its adsorption ability with commercial spherical activated carbon(CAC). CMK-3 had a higher adsorption capacity and faster adsorption rate than CAC. The adsorption property of phenol onto the mesoporous carbon CMK-3 was discussed from the thermodynamic and kinetic viewpoints. The adsorption parameters for Langmuir and Freundlich isotherm models were determined for CMK-3. Both isotherms were suitable models to analyze the equilibrium data for the phenol adsorption. However, the Freundlich model fitted better than the Langmuir model. The adsorption kinetics was tested with the pseudo-first-order and pseudo-second-order reaction mode1. The rate constants of adsorption for these kinetics models were calculated. The pseudo-second-order kinetic model provided the best correlation of the experimental data compared to the pseudo-first-order model. The thermodynamic constants of the adsorption process ΔG⁰, ΔS⁰ and ΔH⁰ were evaluated. These show that adsorption of phenol on CMK-3 was endothermic and spontaneous.

Key words: CMK-3, Phenol, Adsorption kinetics, Adsorption thermodynamics

CLC Number:

O647.3

TrendMD:

GUO Zhuo¹, YUAN Yue². Kinetics and Thermodynamics of Adsorption of Phenolonto Mesoporous Carbon CMK-3[J]. Chem. J. Chinese Universities, doi: .

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Kinetics and Thermodynamics of Adsorption of Phenolonto Mesoporous Carbon CMK-3

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