Abstract
This study reports the incorporation of magnetic γ-Fe2O3 nanoparticles into the carbon framework of highly abundant, house hold medicinal plant, Psidium guajava, commonly known as Guava through co-precipitation. The prepared nanocomposite, γ-Fe2O3@GL was characterized with several spectroscopic and microscopic techniques, and showed the nano-porous structure having extensive oxygenous functional groups at the surface. The saturation magnetic moment of γ-Fe2O3@GL was found to be 0.72 emug−1. Nanocomposite was used for the adsorption of methylene blue from water for which batch experiments were carried out under the change of various process parameters, and exhibited the fast and 99% removal of methylene blue from its solution having 10 mg L−1 concentrations with 1.0 gL−1 amount of γ-Fe2O3@GL. The maximum monolayer adsorption capacity was found to be in range 69.93 to 91.74 mgg−1, at 27–45 °C. The magnetically separable γ-Fe2O3@GL showed the high reusability and adsorption rate without significant loss after sixth adsorption-desorption cycles. Therefore, the prepared magnetic γ-Fe2O3@GL can be useful technique for water treatment having low cost and high adsorption capacity.
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