Kinetic modeling of liquid-phase adsorption of reactive dyes on activated carbon.
Kinetic modeling of liquid-phase adsorption of reactive dyes on activated carbon.
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DOI：
10.1016/j.jcis.2005.01.093
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发表时间：
2005-07
影响因子：
9.9
通讯作者：
Xiaoyan Yang;B. Al-Duri
中科院分区：
文献类型：
--
作者：
Xiaoyan Yang;B. Al-Duri
在间歇式反应器中研究了活性炭对三种活性染料单组分水溶液的吸附平衡和动力学。考察了初始浓度和吸附剂粒径对吸附速率的影响，并用几种常用的吸附等温线模型对吸附平衡数据进行了关联。动力学数据采用伪一级方程、伪二级方程和粒内扩散模型进行拟合。给出了相应的特征速率常数。提出了一个新的基于准一级动力学方程的吸附速率模型来描述整个吸附过程。结果表明，修正后的准一级动力学模型对三种单组分吸附体系的模拟结果与实验数据吻合较好。
In this paper, adsorption equilibrium and kinetics of three reactive dyes from their single-component aqueous solutions onto activated carbon were studied in a batch reactor. Effects of the initial concentration and adsorbent particle size on adsorption rate were investigated Adsorption equilibrium data were then correlated with several well-known equilibrium isotherm models. The kinetic data were fitted using the pseudo-first-order equation, the pseudo-second-order equation, and the intraparticle diffusion model. The respective characteristic rate constants were presented. A new adsorption rate model based on the pseudo-first-order equation has been proposed to describe the experimental data over the whole adsorption process. The results show that the modified pseudo-first-order kinetic model generates the best agreement with the experimental data for the three single-component adsorption systems.