活性炭纤维对水溶液中2,4-二氯苯酚的吸附特性分析
Analysis of adsorption characteristics of 2,4-dichlorophenol from aqueous solutions by activated carbon fiber.
作者信息
Wang Jian-Ping, Feng Hui-Min, Yu Han-Qing
机构信息
Department of Chemistry, University of Science & Technology of China, Hefei, Anhui 230026, China.
出版信息
J Hazard Mater. 2007 Jun 1;144(1-2):200-7. doi: 10.1016/j.jhazmat.2006.10.003. Epub 2006 Oct 11.
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 DeltaH and DeltaS were estimated to be -5.82 kJ/mol and 0.07 kJ/(molK), respectively.
在本研究中，进行了实验以研究静态空气活化的活性炭纤维（ACF）对2,4-二氯苯酚（2,4-DCP）的吸附。根据不同温度下的间歇实验结果，评估了该吸附过程的吸附等温线、动力学和热力学。使用四种吸附等温线模型，即朗缪尔（Langmuir）、弗伦德利希（Freundlich）、雷德利希-彼得森（Redlich-Peterson）和托特（Toth）方程来拟合实验数据，结果表明吸附等温线模型对数据的拟合顺序为：朗缪尔等温线>雷德利希-彼得森等温线>托特等温线>弗伦德利希等温线。在测试温度下，准二级吸附模型比准一级模型和班汉姆（Bangham）模型更能较好地描述吸附数据。计算得出活化能为40.90 kJ/mol，而热力学参数ΔH和ΔS分别估计为-5.82 kJ/mol和0.07 kJ/(mol·K)。
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