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Article dans une revue
Adsorption of basic dyes in single and mixture systems on granular inorganic-organic pillared clays.
Abstract : The adsorption of two basic dyes, CI Basic Yellow 28 and CI Basic Green 4, was studied in single and binary solute systems using two classes of inorganic-organic pillared clay granules as sorbents (300-400 microm and 700-800 microm). These were prepared by high-shear wet granulation from an Al cetyltrimethylammonium bromide intercalated clay powder (particle diameter < 50 microm). Adsorption rate data indicate that BY 28 adsorbs more rapidly than BG 4 and a pseudo-first-order model was found to fit the kinetic curves, with regression coefficients above 0.98. Adsorption isotherms in single solute systems at pH 3 and pH6 were respectively analysed according to the Langmuir and Freundlich models using non-linear regression. Best fits were obtained with the Langmuir model. In binary dye systems the adsorption at three molar ratios (1:9, 1:1 and 9:1) demonstrated that the adsorption of BG 4 was greater than that of BY 28 on all the sorbents studied; this was in agreement with the results obtained for single solute systems. Increasing the granule size decreased dye adsorption, an effect in accordance with the Sheindorf-Rebuhn-Sheintuch model.
https://hal-unilim.archives-ouvertes.fr/hal-00653938
Contributeur : Françoise Merigaud Connectez-vous pour contacter le contributeur
Soumis le : mardi 20 décembre 2011 - 15:51:07
Dernière modification le : mercredi 20 octobre 2021 - 01:31:09
Contributeur : Françoise Merigaud Connectez-vous pour contacter le contributeur
Soumis le : mardi 20 décembre 2011 - 15:51:07
Dernière modification le : mercredi 20 octobre 2021 - 01:31:09
