Abstract
This work used Boundiali and Man clays to eliminate methyl orange in an aqueous medium. These clays were activated with hydrochloric acid and then characterized by scanning electron microscopy, X-ray diffractogram, Brunauer–Emmett–Teller (BET) method, and zero charge pH. Methyl orange concentration was monitored during adsorption using a UV-visible spectrophotometer. Characterization showed that the clays have many micropores, mesopores, and few macropores. The specific surface areas of these clays are equal to 39,084 m2 g-1 and 39,722 m2 g-1 for Boundiali and Man clays, respectively. These clays are composed of kaolinite, illite, and quartz. They have non-uniform morphologies and display irregularly shaped flaky particles of different sizes. The surface pH of Boundiali clay is neutral, while Man clay's is essential. Adsorption of methyl orange on these clays conforms to pseudo 2nd order kinetics with 60 minutes as the equilibrium time. Adsorption is favorable in acidic media and spontaneous at room temperature with both types of clay. The Boundiali clay has an adsorption capacity of 40.486 mg g-1, and the Man clay has an adsorption capacity of 38.610 mg g-1.
Published Version
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