APPLICATION OF ACTIVATED CARBON BASED ON A TUNISIAN DATE STONES FOR THE NI (II) AND ZN (II) ADSORPTION IN SINGLE AND BINARY SYSTEMS

作者：Bouhamed Farah; Elouear Zouhair^*; Bouzid Jalel; Ouddane Baghdad

来源：Fresenius Environmental Bulletin, 2013, 22(12): 3490-3500.

• Date stones residue
• Activated carbon
• Chemical activation
• competitive adsorption

In this study, the adsorption behavior of activated carbon prepared from local agricultural waste, date stones, with respect to Ni2+ and Zn2+, in single and multi metal aqueous solution has been studied in order to consider its application to purity metal finishing wastewaters. To determine the adsorption process and properties, the effects of various operating parameters, pH of the solutions (2-7), initial concentration of metal ions (10-100 mg/L), contact time (5-360 min) and temperature (283-313 K) were investigated in a batch adsorption technique. Adsorption results revealed that the removal speed of Ni (II) and Zn (II) by date stones derived activated carbon was rapid. The pseudo-second-order kinetic model fitted well with kinetic data, in both the single- and binary system. Mutual interference effects were probed using equilibrium adsorption capacity ratios, q(0)/q(0), where the prime indicates the presence of other metal ions. The combined action of the metals was found to be antagonistic, and the metal sorption followed the order Ni(II) (24.4 mg/g) < Ni (Ni + Zn) (22.22 mg/g) < Zn(II) (21.7 mg/g) < Zn (Ni + Zn) (18.51 mg/g) at 298 K. The thermodynamic parameters indicate that the adsorption process is endothermic, feasible and thermodynamically favored.

• 出版日期2013