Sorption of radioactive cobalt onto nano calcium silicate/CuO composite modified by humic acid期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Sorption of radioactive cobalt onto nano calcium silicate/CuO composite modified by humic acid

Authors:	Hassan H S Imam D M Kenawy S H El-Bassyouni G T Hamzawy E M A

Institution:	1.Hot Laboratories and Waste Management Center, Atomic Energy Authority, Cairo, 13759, Egypt ;2.Refractories, Ceramics and Building Materials Department, National Research Centre, Cairo, 12622, Egypt ;3.Glass Research Department, National Research Centre, Cairo, 12622, Egypt ;

Abstract:	The sorption process of Co(II) onto nanoparticles of calcium silicate doped with 5% CuO treated by humic acid was evaluated using batch technique. This process follows the second order kinetic model. Equilibrium isotherm models of Co(II) sorption onto the modified composite was 208.91 mg/g. Negative value of free energy change (ΔG⁰), confirms the spontaneous sorption of Co(II) ions onto the modified composite. The removal efficiency (R%) reached 96.9% using 0.5 g of the modified composite. Therefore, the composite could be used for treatment of radioactive waste containing ⁶⁰Co.

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