Activated carbon was prepared from Behda (BEAC), Anjan (AAC), Chinch (CAC), and Bakam Neem (BNAC) leaves. The effects of various parameters such as initial metal concentration, particle size, pH and contact time for the adsorption of Cu (II) on BEAC, AAC, CAC and BNAC were investigated. The amount of adsorbent increased the percentage of metal removal increased accordingly. The optimum pH for the Cu (II) absorption was 7.0 except BEAC. The equilibrium data fit well with both Langmuir and Freundlich models of adsorption. The value of separation factor RL was found to be 0.042, 0.006, 0.048 and 0.308 for BEAC, AAC, CAC and BNAC respectively suggesting the isotherm to be favourable at the concentration studied. The percentage removal of copper ion on to BEAC, AAC, CAC and BNAC were very significant.