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REVISTA DE CHIMIE
https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie, Volume 61, Issue 1, pp. (2010)




SIMONA GABRIELA MUNTEAN, GEORGETA SIMU, PAULA SFARLOAGA, CRISTIAN BOLOGA Study of a Trisazo Direct Dye Adsorption on Wood Fibre Using a Comparison of Different Adsorption Isotherms

Abstract:

The purpose of this work was investigation of the dyeing mechanism of cellulose natural fibre with azo direct dyes. Two types of cellulose natural fibre - silver fir, beech - were investigated as potential adsorbents for a trisazo direct dye. The effect of dye concentration, temperature, and the adsorbent, on the adsorption was studied. Different adsorption isotherms models are used: Langmuir, Freundlich, Sips, Redlich-Peterson and Dubinin-Raduskevich. Statistical data analysis indicates that the better fitted model with the experimental data was the model described by Sips isotherm. The adsorption capacity values obtained for Sips isotherm were used for the calculation of the main dyeing thermodynamics parameters (affinity, enthalpy and entropy of dyeing). Keywords: trisazo dye, dye adsorption, adsorption isotherms, thermodynamic parameter

Issue: 2010 Volume 61, Number 1
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