Adsorption study for the removal of a basic dye: experimental and modeling

被引：137

作者：

Chakraborty, S ^{[1
]}

De, S ^{[1
]}

DasGupta, S ^{[1
]}

Basu, JK ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Chem Engn, Kharagpur 721302, W Bengal, India

来源：

CHEMOSPHERE | 2005年 / 58卷 / 08期

关键词：

adsorption; dye; saw dust; mass transfer coefficient; effective diffusivity;

D O I：

10.1016/j.chemosphere.2004.09.066

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An effective adsorbent is developed from saw dust and its various adsorption characteristics are studied for removing a basic dye (crystal violet) from its aqueous solution. Equilibrium data are fitted to various adsorption isotherms. It is seen that about 341 mg of crystal violet can be removed using I g of the adsorbent at 298 K. Kinetic study is also carried out to observe the effects of various process parameters viz. particle size of the adsorbent, initial concentration of the dye, temperature and adsorbent amount. A generalized two-resistance mass transfer model, which includes a film mass transfer coefficient (k(f)) and an internal effective diffusivity (D-p), is used to interpret the adsorption kinetic data. The model parameters (k(f) and D-p) are estimated by fitting the experimental data to the model. The evaluated parameters are used to predict the concentration profiles at various other operating conditions. The average deviation of the predicted values lies within 10% in all the cases. Sensitivity analysis is performed to observe the sensitivity of the model to the variations in the model parameters. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1079 / 1086

页数：8

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