Doum fruit is one of the common tradition plants grown in many agriculture area in Sudan, the wastes of the Doum fruit were use to prepare activated carbon through chemical activation method with 1 M KOH and under temperature of 600 0C for 1 hr , the product of the activated was examined for its proximate composition ; ash (4.9%) , moisture (2.2%), carbon content (35.15%) , volatile matter (24.43%) , porosity (60.08%) , iodine number of 15.42 and methylene blue value of 200 mg/g. XRF study on activated carbon prepared from Doum fruit (ACD)shows different concentration of inorganic elements the major elements in the sample are Potassium (1.04%) ,Calcium (1.25%) and Zinc(5.26%).XRD analysis showed the presence of highly organized crystalline structure of raw activated carbon for ACD sample , Carbon with crystalline structure Rhombohedral and Carbon Supplied with crystalline structure Orthorhombic were detected. The result showed a strong and broad adsorption peak at 1577.66 cm-1, which corresponds to the lactone in ACD samples While other strong and broad adsorption peak appeared at 1253.64 cm-1, which corresponds to the aromatic C===O and aromatic structure , conjugate carbonyl was observed at 1595.02 cm-1 for the same sample . The kinetics of adsorption of Fe2+, Cr3+ and Co2+ from aqueous solution has also been investigated. The adsorption process was carried out in isothermal container at 30OC. the effect of dose of activated carbon prepared from the sample on percentage removal metals indicate that the maximum dose of adsorbent was at concentration of 0.8 g/l for sample , The contact time was in 80 min for the samples . The adsorption decreased as the pH increase the optimum pH for the adsorption was attended at 6 for .The experimental isotherm data were analyzed using Freundlich equations. The adsorption process follows the Freundlich order kinetic, having a correlation coefficient (R2) of 0.97. Adsorption capacity with value of 1.36 and Adsorption intensity of 0.13 .
