Abstract
Biosorption of lead (II), copper (II) and cadmium (II) ions from aqueous solutions onto olive leaves powder has been investigated. The biosorption of lead (II), copper (II), and cadmium (II) was found to be dependent on solution pH, initial metal ion concentrations, biosorbent dose, contact time and temperature. The experimental equilibrium biosorption data were analyzed by two widely used two-parameters, Langmuir and Freundlich isotherm models. The Langmuir model gave a better fit than the Freundlich model. The kinetic studies indicated that the biosorption process of the metal ions followed well pseudo-second-order model. The thermodynamic parameters Gibbs free energy, 芒聢聠G<SUP>芒聴娄</SUP>, enthalpy, 芒聢聠H<SUP>芒聴娄</SUP>, and entropy, 芒聢聠S<SUP>芒聴娄</SUP> were also calculated, and the values indicated that the biosorption process was endothermic and spontaneous in nature. It was concluded that olive leaves powder can be used as an effective, low cost, and environmentally friendly biosorbent for removal of Pb(II), Cu(II) and Cd(II) ions from aqueous solution.
Highlights
Heavy metal ions are present in the wastewater of several industries, such as metal cleaning and plating baths, refineries, paper and pulp, fertilizer, and wood preservatives.Different methods have been used on metal content reduction from water and industrial waste such as chemical precipitation, ion exchange, membrane filtration, electrolytic methods, reverse osmosis, solvent extraction and activated carbon adsorption[1,2,3,4,5,6]
In the present work,we have studied the potential oflead (II), copper (II), and cadmium (II) biosorption on a agro material which olive leaves (OL) coming from olive tree waste.Results from this study can be used to assess the utility
To investigate the functional groups of OL and copper loaded OL, a FT-IR study was carried out and the spectra are shown in fig. 1 and 2.The OL leaves displays a number of absorption peaks, reflecting the complex nature of the OL
Summary
Heavy metal ions are present in the wastewater of several industries, such as metal cleaning and plating baths, refineries, paper and pulp, fertilizer, and wood preservatives.Different methods have been used on metal content reduction from water and industrial waste such as chemical precipitation, ion exchange, membrane filtration, electrolytic methods, reverse osmosis, solvent extraction and activated carbon adsorption[1,2,3,4,5,6] These conventional techniques can reduce metal ions, but they do not appear to be highly effective due to the limitations in the pH range as well as the high material and operational costs. In the present work,we have studied the potential oflead (II), copper (II) , and cadmium (II) biosorption on a agro material which olive leaves (OL) coming from olive tree waste.Results from this study can be used to assess the utility
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