Open AccessStatistical Physics Modelling of Dye Adsorption on Modified Cotton
Author(s) -
Mohamed Khalfaoui,
Mohamed Hassen V. Baouab,
Robert Gauthier,
Abdelmottaleb Ben Lamine
Publication year - 2002
Publication title -
adsorption science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.682
H-Index - 36
eISSN - 2048-4038
pISSN - 0263-6174
DOI - 10.1260/026361702760120908
Subject(s) - adsorption , grand canonical ensemble , saturation (graph theory) , chemistry , thermodynamics , sorption isotherm , statistical model , chromatography , physics , mathematics , statistics , monte carlo method , combinatorics
Experimental adsorption isotherms for four anionic dyes (Acid Blue 25, Acid Yellow 99, Reactive Yellow 23 and Acid Blue 74) on to cationized cotton have been analyzed using a multilayer adsorption model. For such purpose, the double-layer model showed the best fit with a high correlation coefficient R 2 . The analytical expression of the model has been established from an application of the grand canonical ensemble of statistical physics. This method allowed an estimation of all the mathematical parameters in the model. Thus, the receptor site density and the half-saturation concentration have been related to physicochemical variables such as the chemical potential, the adsorption energy, the anchorage number, etc. A physical interpretation of the model parameters has been provided and some results relating to the adsorption process discussed.