Adsorption of Cr (VI) from Aqueous Solution by Cetylpyridinium Bromide (CPB) Modified ZeoLite: Kinetic, Equilibrium and Thermodynamics Study

Author

Zhan Yanhui ; Lin Jianwei ; Liu Yu ; Zhu Zhiliang

Author_Institution

State Key Lab. of Pollution Control & Resource Reuse, Tongji Univ., Shanghai, China

fYear

2011

fDate

5-7 Aug. 2011

Firstpage

163

Lastpage

167

Abstract

The kinetic, equilibrium and thermodynamics of Cr(VI) adsorption from aqueous solution on cetylpyridinium bromide (CPB) modified zeolite were investigated. CPB modified zeolite displayed a good affinity to Cr(VI) in aqueous solution, and its Cr(VI) adsorption capacity decreased with the increase of the temperature. The kinetics of adsorption of Cr(VI) were discussed using the pseudo-first-order and pseudo-second-order kinetic models, and the experimental data agreed very well with the pseudo-second-order kinetic model. The adsorption isotherms were analyzed by the Langmuir, Freundlich and Dubinin-Redushkevich (D-R) isotherm models, and the experimental data were well described by all these isotherm models. Thermodynamic parameters such as Gibbs free energy change, enthalpy change and entropy change were calculated and the results showed that the adsorption of Cr(VI) on CPB modified zeolite was spontaneous and exothermic in nature.

Keywords

adsorption; chromium; wastewater treatment; Cr(VI) adsorption; Dubinin-Redushkevich isotherm model; Freundlich isotherm model; Gibbs free energy change; Langmuir isotherm model; aqueous solution; cetylpyridinium bromide modified zeolite; enthalpy change; entropy change; equilibrium study; kinetic study; pseudo-first-order kinetic model; pseudo-second-order kinetic model; thermodynamics study; Chromium; Correlation; Data models; Equations; Kinetic theory; Mathematical model; Thermodynamics; Cr (VI); adsorption; cetylpyridinium bromide modified zeoLite; equiLibrium; kinetic; thermodynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Digital Manufacturing and Automation (ICDMA), 2011 Second International Conference on

Conference_Location

Zhangjiajie, Hunan

Print_ISBN

978-1-4577-0755-1

Electronic_ISBN

978-0-7695-4455-7

Type

conf

DOI

10.1109/ICDMA.2011.47

Filename

6051910