Adsorption Studies of Some Anionic Dyes Adsorbed by Chitosan and New Four-Parameter Adsorption Isotherm Model

The correlation of adsorption isotherm is crucial for the successful implementation of adsorption technology. In this work, the adsorption behavior of anionic dyes, eosin Y, and indigo carmine from dilute aqueous solution on chitosan was investigated at T = 303, 313, and 323 K and P = 0.1 MPa throug...

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Published inJournal of chemical and engineering data Vol. 64; no. 6; pp. 2320 - 2328
Main Authors Gopinathan, R, Bhowal, Avijit, Garlapati, Chandrasekhar
Format Journal Article
LanguageEnglish
Published American Chemical Society 13.06.2019
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Summary:The correlation of adsorption isotherm is crucial for the successful implementation of adsorption technology. In this work, the adsorption behavior of anionic dyes, eosin Y, and indigo carmine from dilute aqueous solution on chitosan was investigated at T = 303, 313, and 323 K and P = 0.1 MPa through adsorption isotherms and thermodynamic parameters such as enthalpy change, entropy change, and Gibbs energy. The experimental data obtained in this study were used to develop a new four-parameter model for correlating liquid-phase adsorption isotherm based on the solid–liquid phase equilibrium. The new model correlates the isotherm as a function of Gibbs energy change and temperature. The overall average absolute relative deviation between the experimental and correlated results was less than 9.0%. Adsorption kinetic studies and effect of pH are reported.
ISSN:0021-9568
1520-5134
DOI:10.1021/acs.jced.8b01102