Adsorption of Metals (Fe(II) , Cr(III) and Co(II)) from Aqueous Solution by Using Activated Carbon Prepared from Mesquite Tree
Science Journal of Analytical Chemistry
Volume 1, Issue 2, November 2013, Pages: 12-20
Received: Nov. 20, 2013;
Published: Dec. 20, 2013
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Nazar Abdualaziz Elnasri Hamza, Department of Chemistry -Faculty of Pharmacy, Sudan International University, P.O. Box 12769, Khartoum, Sudan
Almoeiz Yousif Hammad, Department of Chemistry -Faculty of Pharmacy, Sudan International University, P.O. Box 12769, Khartoum, Sudan
Mohammed Abuzeid Eltayeb, Department of Chemistry–Faculty of Science and Technology ElNeelain University, Khartoum, Sudan
Mesquite tree was 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 content (3.9%) , moisture content (3%), carbon content (40.65%) , volatile matter (25.65%) , porosity (54.95%) , iodine number of 13.22 and methylene blue value of 166.6 mg/g. XRF study on activated carbon prepared from Mesquite tree (ACM)shows different concentration of inorganic elements the major elements in the sample are Potassium (0.301%) ,Calcium (0.357%),Zinc(0.01366%) and Ferrous (0.687%).XRD analysis showed the presence of highly organized crystalline structure of raw activated carbon for ACM sample , Carbon with crystalline structure of Rhombohedral and Carbon Supplied with crystalline structure Orthorhombic and Cubic were detected. The result showed a strong and broad adsorption peak at 1577.66 cm-1, which corresponds to the lactone in ACM sample. While other strong and broad adsorption peak appeared at 1340 cm-1, which corresponds to the Phenol Aliphatic CH2 and CH3 was observed at 2920 cm-1. The kinetics of adsorption of metals 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 0.99(Fe2+), 0.43(Cr3+) and 0.90 (Co2+).Adsorption capacity was high for Fe2+ metals compared to capacity of 3.45 and 2.616 for Cr3+ and Co+2 respectively , adsorption intensity was higher for Co2+ (9.51) than that obtained for Fe2+(2.91).
Nazar Abdualaziz Elnasri Hamza,
Almoeiz Yousif Hammad,
Mohammed Abuzeid Eltayeb,
Adsorption of Metals (Fe(II) , Cr(III) and Co(II)) from Aqueous Solution by Using Activated Carbon Prepared from Mesquite Tree, Science Journal of Analytical Chemistry.
Vol. 1, No. 2,
2013, pp. 12-20.
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