Title: Study on the Adsorption of Uranium(VI) on Ferric Oxide Nanoparticles
Abstract: The static adsorption behavior of ferric oxide nanoparticles as a novel adsorbent to uranium in water was studied by visible spectrophotometry.The effects of pH value in aqueous solution,adsorption time,ionic strength and initial concentration of uranium on adsorption rate were investigated.The results showed that the adsorption rate of uranium was obviously affected by pH value,and reached maximum at pH6.The adsorption reached equilibrium within 5 min with adsorption rate more than 95%.With the concentration of uranyl ion increasing,the adsorption capacity increased gradually while the adsorption rate appeared tendency of decrease.The adsorption equilibrium data were well fitted with the Langmuir isothermal equation and the saturated adsorption capacity of the adsorbent for uranium calculated from the Langmuir isotherm was 39.5mg/g.The kinetic experimental data correlated well with the pseudo-second-order kinetic model.Adsorption enthalpy of standard(ΔHθ) was 4.08kJ/mol,indicating that adsorption reaction was an endothermal process in the range of studied temperature.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 1
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