Isotherm, kinetic and thermodynamic studies of methylene blue adsorption using Leucaena leucocephala

In recent years, great focused has been placed on the development of low-cost adsorbents to be used for applications regarding treatment wastewater. this study, Leucaena leucocephala peel (LLP) was adsorption methylene blue from aqueous solutions. The experiments were conducted at seven concentrations (15, 30, 45, 60, 75, 90, 105 mg L-1) and three temperatures (298, 308, 318 K). obtained data applied isotherm, kinetic thermodynamic calculations. results showed that Freundlich isotherm more appropriate compared Langmuir Temkin isotherms. indicated process fitted pseudo second order model with higher R2 values first intra-particle diffusion models. Gibbs free energy, enthalpy entropy calculated 298 K as 2.776 kJ mol-1, 6.262 mol-1 11.699 J respectively.