Analysis of adsorption characteristics of 2,4-dichlorophenol from aqueous solutions by activated carbon fiber

作者：Wang Jian Ping; Feng Hui Min; Yu Han Qing^*

来源：Journal of Hazardous Materials, 2007, 144(1-2): 200-207.

DOI：10.1016/j.jhazmat.2006.10.003

• 2,4-DCP
• ACF
• adsorption
• isotherm
• kinetics
• thermodynamics

In this study experiments were conducted to investigate the adsorption of 2,4-dichlorophenol (2,4-DCP) by activated carbon fiber (ACF) activated by static air. With the results of batch experiments at various temperatures, the adsorption isotherms, kinetics and thermodynamics of this adsorption process were evaluated. Four adsorption isotherm models, Langmuir, Freundlich, Redlich-Peterson and Toth equations, were used to fit the experimental data and the results reveal that the adsorption isotherm models fitted the data in the order of: Langmuir > Redlich-Peterson > Toth > Freundlich isotherms. A pseudo second-order adsorption model was better to describe the adsorption data than the pseudo first-order model and the Bangham model at the temperatures tested. The activation energy was calculated to be 40.90 kJ/mol, while the thermodynamic parameters Delta H and Delta S were estimated to be -5.82 kJ/mol and 0.07 kJ/(mol K), respectively.

• 出版日期2007-6-1
• 单位中国科学技术大学