The Research of Absorption on U(VI) by Nanometer α-Fe₂O₃ Microsphere

Abstract:

Adsorption of uranium(VI) ions by Sodium alginate (SA) immobilized nano-α-Fe₂O₃ particles beads were investigated in the batch experiments.The influences of the nano-ferric oxide content in beads，cross-linking time, solution pH, initial U(VI) concentration, temperature and contact time on U(VI) sorption were studied. The results indicated that the adsorption capacities are strongly affected by the solution pH, the best adsorption rate can be thought of to be at pH 3. The adsorption was rather fast in the initial 1.5 h, and the equilibrium was established in 9 h with the sorption capacity 2.64 mg/g. The kinetic adsorption data was simulated better by a pseudo-second-order equation. The removal rate increased slowly with temperature ascending . The adsorption process conformed to the Langmuir and Freundlich isothermal adsorption models, and the data fitted the latter better.

• Periodical: Advanced Materials Research (Volumes 1010-1012)
• Pages: 817-820
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1010-1012.817
• Online since: August 2014
• Authors: Qing Peng Wei, Shi You Li*, Shui Bo Xie, Jian Biao Liao, Yin Li
• Keywords: Adsorption, Nano-α-Fe₂O₃, SA immobilized beads, U(vi)

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