Adsorption Capacity of Phenol by Activated Carbon from Sheep Bones

Activated carbon derived from sheep bones was prepared by chemical activation method using ZnCl2 and nitrogen as activating reagent and was used for the adsorption of phenol. Influences of contact time, temperature, initial concentration of phenol and dosage on adsorption effect were investigated with adsorption isotherm, to fit with Langmuir equation, Freundlich equation and kinetic models. Results showed that the phenol removal rate from solution was over 96% when initial phenol concentration was 100 mg/L, activated carbon dosage with 1.5 g at 25 ℃ and contact time for 1 h. The adsorption isotherm curve fitted well with the isotherm equations and pseudo-second-order model, with BET surface area 149.87 m2/g and total pore volume 0.231 6 cm3/g.