The studies on removal of Manganese (II) were conducted using Granulated Activated Carbon (GAC) in combination with Chelating agents, Ethylene di-aminetetraacetic Aced (EDTA) and Nitrilotriacetic Acid (NTA) at 25°C. The adsorption efficiency was studied in the pH range. The results reveals that Langmuir and Freundlich isotherms are followed during adsorption process with the chelating agents under study. The granulated activated carbon (GAC) loaded with Ethylene di-aminetetraacetic acid (EDTA) shows greater adsorptive capacity as compared to granulated activated carbon (GAC) loaded with the chelating agent. Nitrilotriacetic acid (NTA).