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Adsorption of Methylene Blue from Aqueous Solutions using Fe3O4/ Bentonite Nanocomposite

Abstract

Hashem FS

Magnetic Fe3O4/bentonite nanocomposite was prepared by chemical co-precipitation method. The product was characterized by X-ray diffraction and Scanning electron microscope. Batch adsorption experiments were carried out for the removal of methylene blue from aqueous solutions using Fe3O4/bentonite nanocomposite. Effects of pH of the initial dye solution, mass of the adsorbent and the contact time on the adsorption capacity were studied. The results showed that the adsorption capacity for the dye increased by increasing the contact time and initial pH of the solution. However, it decreased with increasing the mass of the adsorbent. The adsorption behaviors of the nanocomposite showed that the adsorption kinetics and isotherms were in good agreement with pseudo 2nd order kinetic equation and L angmuir equation, respectively, and the maximum adsorption capacity was 1600 mg/g. For this the prepared nanocomposite could be regarded as a potential adsorbent for MB removal in a wastewater treatment.