Study of the Kinetics, Thermodynamics and Isotherm of Adsorption of Diamine green B dye using biocatalyst Laccase@Fe-BTC

Articles in Press

Document Type : Original Article

Authors

1 1. Department of Chemistry, Fdaculty of Analytical chemistry, Urmia university, Urmia, IRAN

2 Department of civil Engineering,Faculty of Engineering, Qom university of Technology,Qom,IRAN

3 3. Department of Chemistry, Faculty of Analytical chemistry, Urmia university, Urmia, IRAN

Abstract

In this study, isotherm, kinetics and thermodynamic properties of Diamin green B dye adsorption were investigated using enzymatic metal organic frameworks. First and second-order kinetic models and alovich kinetic model as well as Langmuir and Freundlich isotherm models were also used to evaluate the data. According to previous studies, dye adsorption efficiency by this material was investigated by examining the effects of contact time, adsorbent value and primary dye concentration. The most optimized adsorption conditions for this nano adsorbent were also obtained at time of 45 minutes and 5 g/l of adsorbent. The calculated values for the thermodynamic variables ΔG, ΔH and ΔS indicate that the adsorption of the tested dye onto the enzymatic organometallic adsorbent is spontaneous, endothermic and in the direction of increasing disorder. The process data were described by Alovich kinetics. Several isotherm models were also fitted to the experimental data and the Freundlich Isotherm model provided the best fit.

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Main Subjects

Progress in Color, Colorants and Coatings

Articles in Press, Accepted Manuscript
Available Online from 31 May 2025

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