Adsorptive removal of congo red, a carcinogenic textile dye by chitosan hydrobeads: Binding mechanism, equilibrium and kinetics

被引：376

作者：

Chatterjee, Sandipan ^{[1
]}

Chatterjee, Sudipta ^{[1
]}

Chatterjee, Bishnu P. ^{[1
]}

Guha, Arun K. ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Biol Chem, Kolkata 700032, W Bengal, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2007年 / 299卷 / 1-3期

关键词：

chitosan hydrobeads; congo red; adsorption; binding mechanism; zeta potential;

D O I：

10.1016/j.colsurfa.2006.11.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Physico-chemical investigation on adsorption of congo red, an anionic azo dye by chitosan hydrobeads has been carried out. Adsorption process has been found to be dependant on temperature with optimum activity at 30 degrees C. Both ionic interaction as well as physical forces is responsible for binding of congo red with chitosan. Theoretical correlation of the experimental equilibrium adsorption data for congo red-chitosan hydrobeads system would be best explained by linearized form of Langmuir isotherm model. The kinetic results follow pseudo second-order rate equation. pH of the experimental solution influenced congo red adsorption inversely, and similar to 20.0% of the dye could be desorbed from the loaded beads by changing the pH of the solution to alkaline range (similar to pH 12.0). Both sodium chloride and sodium dodecyl sulfate significantly influenced the adsorption process. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：146 / 152

页数：7

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