Adsorption isotherm models for dye removal by cationized starch-based material in a single component systera: Error analysis

被引:401
作者
Gimbert, Frederic [1 ]
Morin-Crini, Nadia [1 ]
Renault, Francois [1 ]
Badot, Pierre-Marie [1 ]
Crini, Gregorio [1 ]
机构
[1] Univ Franche Comte, Lab Chronoenvironm, CNRS, UMR 6249, F-25030 Besancon, France
关键词
adsorption; starch; Acid Blue 25; isotherm; Langmuir; Freundlich; Tempkin; Generalized model; Redlich-Peterson; Toth; error analysis;
D O I
10.1016/j.jhazmat.2007.12.072
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
This article descdbes the adsorption of an ani onic dye, namely C.I. Acid Blue 25 (AB 25), from aqueous solutions onto a cationized starch-based adsorbent. Temperature was varied to investigate its effect on the adsorption capacity. Equilibrium adsorption isotherms were measured for the single component system and the experimental data were analyzed by using Langmuir, Freundlich, Tempkin, Generalized, Redlich-Peterson, and Toth isotherm equations. Five error functions were used to determine the alternative single component parameters by non-linear regression due to the bias in using the correlation coefficient resulting from linearization. The error analysis showed that, compared with other models, the Langmuir model described best the dye adsorption data. Both linear regression method and non-linear error functions provided the best-fit to experimental data with the Langmuir model. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:34 / 46
页数:13
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