The effect of surface properties on the uranium adsorption by mesoporous ceria
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CeO2 solids of different surface areas have been prepared by a sol–gel method using Triton X-100. The samples have then characterized by N2 adsorption, XRD, SEM microscopy and FTIR spectroscopy. Furthermore, the effect of the surface area on the U(VI) adsorption was investigated by batch-type experiments and evaluated by correlating the surface parameters with the corresponding maximum adsorption capacity values (0.108 < qmax < 0.162 mg g−1). The adsorption of U(VI) by CeO2 is well described by the Langmuir isotherm model indicating simple interaction between the U(VI) ions and the surface hydroxyl groups.
KeywordsUranium Ceria Surface area and hydroxyl groups U(VI) adsorption isotherms qmax values
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