Activated carbon prepared form coconut residues (CORC), and agricultural waste by-product obtained after oil extraction was used for the adsorption of Ni(II) form aqueous solution. The process of uptake obeys both Freundlich and Langmuir adsorption isotherms. Kinetic studies indicate that it obeys Lagergram kinetic model. Quantitative removal of Ni(II) from 100mL aqueous solution containing 10mg/L of Ni(II) was observed over a PH range 4.0 to 10.0. The suitability of this material for trating nickel-plating industry wastewater was also examined. A comparative study with a commerical granular activated carbon (CAC) showed that CORC is 6 times more efficient compared to CAC based on Langmuir adsorption capacity(Q°).