الفهرس 
Chapter One: IntroductionOnly 14 pages are availabe for public view
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Abstract
The ability of natural clay to adsorb Basic Red 22 (BR22) and Basic Blue 69 (BB69) has been investigated. Physical, chemical and mineralogical analyses of natural clay have been determined in this work.
Adsorption isotherms of BR22 and BB69 onto natural clay at different particle size ranges have been studied. The adsorption capacities of natural clay for BR22 and BB69 were increased from 252.265 to 268.895 mg.g-1 and from 321.70 to 342.00 mg.g-1, respectively as a particle size range decreased from 710-1000 μm to 250-355μm.
Isotherm modeling has been analyzed using Langmuir, Freundlich and Redlich-Peterson models. The Freundlich model was found to be the best fit for the experimental data compared to other models based on the small values of error functions and graphical presentation for BR22 and BB69.
Mass transfer and kinetic study for the adsorption of BR22 onto natural clay using of batch adsorber have been investigated. The experimental results have been analyzed using external mass transfer and intraparticle diffusion models as mass transfer models and Lagergren Pseudo-First-order and Ho Pseudo-Second-order as kinetic models. Ho Pseudo-Second-order model fitted the experimental data better than the Lagergren Pseudo-First-order model for the adsorption of BR22 onto natural clay.