ADSORPTION STUDIES OF COBALT IONS ON SURF- ACE MODIFIED GRANULAR ACTIVATED CARBON

In this study, removal of cobalt ions from aqueous solution by adsorption was investigated. For this purpose the surface modification of granular activated carbon was achieved by using 2Hydroxy-5-methoxy benzoic acid and 3-Nitro aniline at constant temperature 25 ± 1 o C . The adsorption isotherms of cobalt on Granular Activated Carbon (GAC) have been determined and the data were fitted better to the Langmuir and Freundlich isotherm model indicating favorable and monolayer adsorption. The results indicated that GAC in combination with organic ligand could function very effectively in the removal of the cobalt ions from aqueous solution.