Abstract
The removing of methylene blue dye (MB+) from aqueous solution by using biomass of Date palm seeds (BDPS) has been studied in a batch sorption. The kinetics of sorption has been carried out by controlling different parameters such as initial concentration, dosage, temperature, and pH. The sorption equilibrium is achieved during the first 20 minutes. The maximum removal of MB+ is 94 % upon the study conditions of C-i = 100 mg L-1, T= 20 degrees C, 80 rpm). The reaction kinetic models, such as pseudo-first-order and pseudo-second-order, and adsorption diffusion model, such as Weber-Morris intra-particle diffusion model, have been used to describe the sorption rate and mechanism of the MB+ onto BDPS. The sorption process of MB+ into BDPS has followed the pseudo-second-order model (R-2 = 1). The kinetic parameters, the rate constant, and sorption capacities have been calculated. The new information about this study suggests that biomass of Date palm seeds can be used as natural and safe materials for removing MB+ from the water.