Preparation of activated carbon from orange peel and its application for phenol removal
Abstract— Activated carbon obtained from orange peel (ACO) was used as a phenol adsorbent. ACO was characterized by X-ray diffraction, Raman spectroscopy, scanning electronic microscopy (SEM) and energy dispersive spectroscopy (EDS). The functional groups present on the sample, were determined by Boehm titration, and it was also determined the point of zero charge (pHpzc). ACO is mainly constituted by micropores, and its structure is turbostratic and lamellar with inorganic impurities. The Boehm titration indicated the basic behavior of the sample. The phenol optimum dosage was 0.1 g/50 cm3 which was determined by the adsorption study. The maximum adsorption level was in the pH range of 4-8 and its kinetics was described by a pseudo second order model. The equilibrium data have fit very well the Langmuir and Sips isotherms models.Keywords— adsorption, agricultural waste, biomass, orange peel, phenol.
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