Abstract
A modified loquat leaves (MLL) for the removal of copper(II) and lead(II) ions from aqueous solutions has been investigated. The biosorption of copper(II) and lead(II) ions 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 three widely used two-parameters; Langmuir, Freundlich, and Temkin isotherm models. Langmuir isotherm model provided a better fit with the experimental data than other models by high correlation coefficients R2. Kinetic studies showed that pseudo-second order described the biosorption experimental data better than the pseudo-first order kinetic model. Key words: Biosorption, loquat leaves, copper, lead, adsorption isotherms, kinetic.
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