Banana peel, an agricultural waste, was used as biosorbent for the biosorption of cadmium ions from aqueous solution. The important
parameters such as particle sizes, initial solution pH and initial cadmium ion concentration were evaluated on the biosorption studies, in a
batch scale at 25๐
C. Fourier transform infrared spectroscopy revealed that carboxyl, hydroxyl and amide groups on the banana peel surface
was involved in the adsorption of the cadmium ions. The particle size of banana peel had no effect on the removal of cadmium ions. The
cadmium ion removal increased significantly as pH of the solution increased rapidly from 1 to 5. At pH of about 5, cadmium ion removal
reached a maximum value of 17.94%. Biosorption isotherms showed an S-shaped isotherm, that did not follow the Langmuir and
Freundlich isotherm model. The result shows that banana peel could be used as biosorbent for removing cadmium ions from aqueous
solution. A low cost material that shows potential use in wastewater technology for removing of heavy metal.
Keywords— Banana peel Biosorption Cadmium Wastewater