One of the maximum residences of activated carbon is adsorption capacity, this significance grows every day in a variety of fields. One of its examples is water treatment, processing of potable, all of those residences deliver capacity of activated carbon in smell elimination and flavor in residues of dissolved natural and color. Activated carbon was made from the carbonization of palm tree leave's stems and activated using calcium chloride, then tested with an increase in reactivity indicated by iodine adsorption test up to 68.6% reactivity increase in commercial sample and 48.7% in palm tree leaves sample. As the methods and precursors of activated carbon are very diverse and result in deferent adsorption properties, the primary test includes: carbonization of palm tree leaves, size reduction and classification of the charcoal produced, applying an iodine test on the non-activated sample, activating another sample with activating agent CaCl 2 to comparison between the activated carbon and the non-activated carbon and shows the increasing in the adsorption capacity for elemental iodine in activated carbon.