Biosorption of basic dye from aqueous solutions by Date Stones and Palm-Trees Waste: Kinetic, equilibrium and thermodynamic studies

► Biosorption potential of Date Stones (DS) and Palm-Trees Waste (PTW) for the removal of Methylene Blue from aqueous solution was investigated. ► Several modelling of kinetic, equilibrium and thermodynamic aspects have been applied for evaluation of data. ► Biosorption processes of Methylene Blue on DS and PTW is described by pseudo-second-order kinetics in the temperature range of 20-70°C. ► The calculated thermodynamic parameters showed that the biosorption of Methylene Blue on both biomasses was spontaneous and endothermic.