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The effect of temperature on the sorption of U(VI) onto ZrP2O7 in the presence of oxalic acid |
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| Authors: | N. García González E. Ordóñez Regil D. A. Solís Casados M. G. Almazán-Torres E. Simoni R. Drot A. Jeanson |
| Affiliation: | 1. Instituto Nacional de Investigaciones Nucleares, Carr. México-Toluca S/N, 52750, La Marquesa, Ocoyoacac, Mexico 2. Programa de Doctorado de Ciencia de Materiales de la Facultad de Química, Universidad Autónoma del Estado de México, Esq. Paseo Colón y Paseo Tollocan, 50000, Toluca, Mexico 3. Groupe de Radiochimie, Institut de Physique Nucléaire, Université Paris Sud 11, 91406, Orsay, France |
| Abstract: | The sorption of uranium onto ZrP2O7 in the presence of oxalic acid has been investigated as a function of temperature (20, 40 and 60 °C). Using several complementary analytical methods to characterize the solid surface, it has been shown that the oxalic acid interact with the zirconium diphosphate affecting its surface reactivity. A significant influence of temperature on the sorption reaction has been revealed in the batch experiments. Temperature dependence sorption data and microcalorimetric measurements have been used to determine enthalpy change associated to the sorption reaction. The results have shown that oxalic acid has an important effect on uranium sorption, which is more evident at 60 °C. |
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