JOURNAL of the Tunisian Chemical Society

serving the Research, the Education and the Industry

Batch adsorption of methylene blue on silica gel obtained from Tunisian sand

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Silica gels used were obtained by alkaline attack of Tunisian sand, coming from Feriana region. A kinetic of methylene blue adsorption in liquid phase onto silica gels has been studied. The results show the effects of silica gel pH, initial concentration of methylene blue and temperature on adsorption capacity. Adsorption isotherms have been determined and fitted according to the Langmuir and Guggenheim N Anderson NDe Boer (G.A.B.) equations. A high adsorptive capacity was observed. Thermodynamic parameters such as ∆H and ∆S were determined.

M. Besbes, N. Fakhfakh, M. Benzina

silica gel, adsorption, isotherms, kinetics, modelling

Pages 41-52

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