The biosorption of MB from aqueous solution onto natural and activaed banana peel has been studied.
This biosorption process was highly dependent on the basic pH and the favorable value of pH was ranged
between 4 and 8 where the elimination rate was the maximum. The biosorption capacity increased with an
increase of initial dye concentration. Langmuir isotherm was able to adequately describe this biosorption
equilibrium for the whole concentration range of NBP. But Freundlich isotherm agreed well with the
experimental data for treated support (ABP). The pseudo-second-order model expresses the biosorption
kinetics well. The analysis by FTIR further revealed that functional groups (e.g., amine, hydroxyl and
carboxyl) on banana peel would be the active binding sites for the biosorption of the studied dye. The
present work shows that banana peel can be effectively used as a low-cost biosorbent for the removal of
MB dye from wastewater.