Chemistry Letters, Vol.46, No.4, 516-519, 2017
Removal of Bromophenols from Aqueous Solution by Using Hazelnut Shell-derived Activated Carbon: Equilibrium Study and Influence of Operation Conditions
Removal of three bromophenols (BPs), namely, 2-bromophenol (2-BP), 4-bromophenol (4-BP), and 2,4-dibromophenol (DBP), from aqueous solutions using hazelnut shell-derived activated carbon (HSAC) as the adsorbent had been performed by varying parameters such as pH, initial concentration, contact time, and ionic strengths by using a batch equilibrium method. The maximum removal percentages of three BPs were observed in the pH range of 1 to 9. It was found that the adsorption equilibrium was reached within 5min and the pseudo-secondorder model was better fitted than the pseudo-first-order model for the description of adsorption kinetics. The adsorption equilibrium data could be well fitted by the Langmuir model with the maximum adsorption capacities of 222.2 mg g(-1) for 2-BP, 196.1 mg g(-1) for 4-BP, and 232.6 mg g(-1) for DBP, respectively. HSAC indicated great potential in removal of BPs from an aqueous solution.