محبوبه شیرانی

In this study, the dried quince stem as a novel biosorbent was applied for simultaneous adsorption of lead from aqueous solutions. The amount of biosorbent, pH, time, and temperature were studied. At optimum conditions of pH of 6.5, temperature of 25 ᵒC, time of 8 min, amount of biosorbent of 10 mg, and the initial lead ion concentration of mg L-1, the maximum removal (%) of 98.1 ± 0.5 was obtained. The potential of the method was considered in water samples including river water and tap water and the recoveries > 96 % indicate high capability of the method. The experimental data were adequately fitted into Fredluich model which proves that the adsorption occurs on a heterogeneous material. The maximum sorption capacity of mg g-1 was achieved for removal of lead ions by dried quince stem.