Adsorption of methylene blue onto artichoke waste

The objective of this study is the removal of methylene blue dye by adsorption on activated carbon prepared from artichoke waste. Adsorption tests showed that the equilibrium is established after 100 minutes. Different experimental factors were analyzed: the size, mass of adsorbent and the initial concentration of methylene blue. The results of the experiment showed that the adsorption of methylene blue dye on the artichoke waste depends on the particle size and the initial concentration of dye. The adsorption capacity was determined using the Langmuir and Freundlich isotherms. The adsorption kinetics of methylene blue was studied using the equations of pseudo-first-order and pseudo-second- order. The adsorption of methylene blue dye artichoke waste can be described by a kinetic pseudo-second-order.