Removal of methylene blue and phenol onto prepared activated carbon from Fox nutshell by chemical activation in batch and fixed-bed column

Fox nutshell was used as a new precursor for the production of a high surface area activated carbon with zinc chloride activator at 600 degrees C activation temperature and 2.0 impregnation ratio. The Brunauer Emmett Teller (BET) surface area of the prepared activated carbon was 2869 m(2)/g with total pore, micropore and mesopore volume of 1.96,1.68 and 0.28 cm(3)/g. Methylene blue and phenol were used as adsorbates for adsorption experiment onto prepared high surface area activated carbon in batch and column scale. Adsorption kinetics of methylene blue and phenol was studied by using commonly kinetic models, i.e., the pseudo-first-order model, the pseudo-second-order model, and the intraparticle diffusion model. The experimental adsorption isotherms of these adsorbates on the prepared activated carbon were analysed using three isotherm models: the Langmuir, Freundlich and Tempkin. The equilibrium adsorption (q(e)) of methylene blue was increased from 249.88 to 968.74 mg/g and for phenol was increased from 19.84 to 75.37 mg/g when initial concentration was enhanced from 100 mg/L to 500 mg/ L The negative values of the enthalpy change (Delta H-0 = 2.93 kjimol for MB and 16.92 kjimol for phenol) indicate that the MB and phenol adsorption process onto FNAC was exothermic in nature. In column experiments, the effects of the bed height of the packing material and flow rate of methylene blue and phenol onto prepared activated carbon were studied. (C) 2016 Elsevier Ltd. All rights reserved.