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131I− sorption from aqueous solutions by nitrated hydrotalcites

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Abstract

The sorption of radioactive iodide anion from aqueous solutions on hydrotalcite in the nitrate form has been investigated as a function of the Al/(Mg+Al) ratio. It was found that I− can replace only a small fraction of the nitrates in hydrotalcites and that I− sorption depends highly on Al/(Mg+Al) ratio.131I− was sorbed by anion exchange in the interlayer of hydrotalcite with an Al/(Mg+Al) ratio of 0.20 and, for higher ratios,131I− sorption increased more than 3 times. Hydrotalcites in the nitrate form were prepared using microwave irradiation in the hydrotreatment step. The radionuclide content was determined by Γ-spectrometry. Solids were characterized by BET, X-ray diffraction and atomic absorption analyses.

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Authors and Affiliations

  1. Instituto Nacional de Investigaciones Nucleares, Col. Escandón, Delegación Miguel Hidalgo, A.P. 18-1027, C. P. 11801, México, D.F., México

    M. T. Olguín & S. Bulbulian

  2. Iztapalapa Michoacán y Purísima, Universidad Autónoma Metropolitana, Iztapalapa, A.P.55-532, C.P.09340, México, D.F., México

    P. Bosch & V. H. Lara

  3. Instituto Politécnico Nacional, ESIQIE, SEPI UPALM Edif 8, 8. 3er piso, Zacatenco, C. P. 07738, México, D. F., México

    G. Fetter

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  1. G. Fetter
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  2. M. T. Olguín
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  3. P. Bosch
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  4. V. H. Lara
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  5. S. Bulbulian
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Fetter, G., Olguín, M.T., Bosch, P. et al. 131I− sorption from aqueous solutions by nitrated hydrotalcites. J Radioanal Nucl Chem 241, 595–599 (1999). https://doi.org/10.1007/BF02347218

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  • DOI: https://doi.org/10.1007/BF02347218

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