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Sayed Zia Mohammadi,Hooshang Hamidian,Zahra Moeinadini 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
A high-surface-area activated carbon was prepared by chemical activation of Glycyrrhiza glabra residuewith ZnCl2 as active agent. Then, the adsorption behavior of Pb(II) and Ni(II) ion onto produced activatedcarbon has been studied. The experimental data were fitted to various isotherm models. According toLangmuir model, the maximum adsorption capacity of Pb(II) and Ni(II) ions were found to be 200 and166.7 mg g-1, respectively, at room temperature. Kinetic studies showed the adsorption processfollowed pseudo second-order rate model. High values of intra-particle rate constants calculated showsthe high tendency of activated carbon for removal of Pb(II) and Ni(II) ions.