Chemistry Journal
Articles Information
Chemistry Journal, Vol.2, No.1, Feb. 2016, Pub. Date: Mar. 9, 2016
Batch Equilibrium Adsorption of Cu2+, Mn2+ and PO43- Ions from Aqueous Solution onto Aluminum Pillared Clay from Karewa (North−Cameroon)
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[01] Massaï Harouna, Department of Chemistry, Faculty of Science, University of Maroua, Maroua, Cameroon.
[02] Constant Tcheka, Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon.
[03] Albert Laoh Djongmaila, Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon.
[04] Daouda Abia, Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon.
[05] Jean Pierre Nguetnkam, Department of Chemistry, Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon.
[06] Joseph Ketcha Mbadcam, Department of Inorganic Chemistry, Faculty of Science, Unuiversity of Yaounde I, Yaoundé, Cameroon.
[07] Benoît Benguellah Loura, Department of Chemistry, Higher institute of the Sahel, University of Maroua, Physical Chemistry, Maroua, Cameroon.
[08] Mohamed Mbarki, Department of Chemistry and Environment, Faculty of Science and Technology, University of Sultan Moulay Slimane, Beni Mellal, Morocco.
The study of the adsorption of heavy metals and the organic molecules by clays is a contribution to the treatment of water. This work primarily concerns the elimination of the ions Mn2+, Cu2+ and PO43- of synthetic water, by adsorption on modified clay. Some physicochemical parameters of pillared clay were studied such as the pH (6.83), the water content (22.40%), the swelling number (98.83%), the loss on the ignition (4.35%), the density (1.13) and colloidality (95.75%). Following this view, clay materials of Karewa (North Cameroon), specially made up of smectite, have been pillared with polyoxycations of aluminum. Next, some trials of adsorption of metallic ions Cu2+, Mn2+ and PO43- in aqueous solution mixture were carried out by varying the time of contact, the pH, the initial concentration of ions, Co and the temperature, T(°C). The kinetics of the reactions indicate that the adsorption of Cu2+, Mn2+ and PO43- ions is rapid and the equilibrium is reached after 8 minutes. The adsorption capacity, Qe of the clay modified increases with increasing pH up to pH = 7, and reduces when the pH becomes basic. This phenomenon also increases with the increase in the initial concentration of the metallic ions. It was observed that, temperature has a less influence on the retention capacity. The adsorption isotherms are comparable with the Langmuir and Freundlich models. The adsorbed quantities from the monolayer coverage deducted from Langmuir’s model are 21.73 mg/g, 20.62 mg/g and 26.31 mg/g respectively for Cu2+, Mn2+ and PO43- ions. The nature of the retention phenomenon of both ions is exothermic, spontaneous and physical in the range of temperature 298-313K.
Pillared clay, Adsorption, Heavy Metals, Organic Molecules
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