Removal of cationic dye -Methylene bleu- from aqueous solution by adsorption onto corn cob powder calcined

This study involved adsorption of methylene (mb) dye adsorbed from solution on the surface of corn cob powder calcined. various techniques for characterizing the adsorbent were used,including scanning electron microscopy (sem) coupled by edx and fourier transform infra-red spectroscopy (ftir). the effects of different parameters such as adsorbent dose,initial dye concentration,contact time,temperature and ph of dye solution have been studied to understand the sorption behavior of the sorbent under various conditions. concentrations of dye were measured before and after adsorption using ultraviolet (uv) spectrophotometer. the experimental isotherm data were analyzed using langmuir and freundlich isotherm equation. the maximum monolayer adsorption capacity was 46.28 mg/g at optimum conditions. the kinetic results of sorption obeyed a pseudo-second-order model. different thermodynamic parameters showed spontaneous reaction with endothermic nature.