标题：Kinetics, thermodynamics and equilibrium evaluation of adsorptive removal of iron from aqueous solution onto Algerian biosorbent 'LUFFA CYLINDRICA', Ad C.,
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：1
页码：319-330
出版社：University of Mohammed Premier Oujda
摘要：This study was focused on the adsorption of iron (II) on the cords of Luffa Cylindrica fibers, LC, as an Algerian biosorbent in the batch equilibrium. The vibrational characteristics, morphological, and structural of the LC are effectuated by Fourier transform infra red spectroscopy (FT-IR) studies and by x-ray diffraction (XRD) before and after adsorption. Kinetic models, thermodynamic studies, and four types of adsorption isotherms: Langmuir, Freundlich, Temkin and Dubinin–Radushkevich, were used to describe this phenomenon of adsorption. It was studied the influence of various parameters such as: the time of contact, pH, initial concentration, effect of masse and particles size of the biosorbent. Experimental results were shown that iron adsorption depends mainly on the pH and the initial concentration of the iron (II) in solution. Langmuir model is most representative for the adsorption of iron(II) on LC cords. The pseudo-second-order rate equation described the Kinetic data well. The examination of the thermodynamic analysis shows that the reaction is exothermic (ΔH ° <0), negative value of entropy (ΔS ° ) indicates that there is a decrease in the messy interface solution system (solid / solute) during the adsorption process. Negative values of Gibbs energy (ΔG ° ) show that the adsorption process is spontaneous
