ABSTRACT: Methylene blue adsorption from aqueous solution onto activated carbon prepared from strychnos potatorum seed was investigated under various experimental conditions. Batch mode experiments and equilibrium isotherm studies were conducted to assess the potential of the above activated carbon for the removal of Methylene blue from aqueous solution by varying the following three parameters: initial concentration of Methylene blue dye solution, adsorbent dose on the uptake of dye from the solution, and p^H. The equilibrium data obtained were fitted to Langmuir and Freundlich isotherm models.

Keywords: Sorption, Isotherms, Activated carbon, carbonization, Methylene blue, Langmuir model, Freundlich model