Abstract
This study outlines the kinetic rate of adsorption of three commercial anionic direct dyestuffs by two types of Egyptian kaolinite, i.e. Sinai and Kalabsha. The structure of the dyestuffs, as well as the structure of kaolinites. plays a great role in dye adsorption. The Sinai kaolinite shows a higher apparent ion-exchange capacity than the Kalabsha one. Some factors affecting dye adsorption are investigated, e.g. kaolinite and dye concentration, shaking time, temperature and addition of electrolytes.
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