Saccharum ArundinaceumLeaves as a Versatile Biosorbent for Removal of Methylene Blue Dye from Wastewater

PowderedSaccharum arundinaceumleaves (PSAL) are an agricultural waste and are abundantly available for use as a versatile, low-cost biosorbent for removal of dyes from wastewater in manufacturing, printing, and textile industries. In this study, the equilibrium adsorption and kinetics of adsorption of methylene blue (MB) with PSAL were studied by performing batch experiments. The effects of MB dye concentration, contact time, temperature, pH, and adsorbent dose were investigated. The adsorption of MB dye was enhanced in alkaline media (pH 10). Langmuir isotherm formulations were applied to investigate the nature of sorption. Similarly, Freundlich adsorption isotherm was also investigated. The Langmuir isotherm has the highest value ofR(2)(0.99) compared to other sorption isotherm models. Moreover, PSAL showed favorable adsorption with the separation factor (R-L< 1). Similarly, the rates of uptake were tested with models of pseudo first and second order kinetics. High coefficient of determination (R-2) and the low sum of squared error values confirm that the adsorption process proceeds through pseudo second order kinetics. Thus, on the basis of kinetic analysis, PSAL are an effective biosorbent to remove MB dye from wastewater.