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Kinetic and thermodynamic studies of U(VI) adsorption using Dowex-Marathon resin

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Abstract

The kinetics and thermodynamics of U(VI) adsorption on Dowex-Marathon anionic resin have been studied. The process was well described by the pseudo-second order kinetic model for 0.02–0.1 M U(VI) concentration. The activation energy of U(VI) adsorption on Dowex-Marathon resin was determined: 6.62 ± 0.16 kJ/mol, indicating that the adsorption has a low potential barrier and corresponds to a physisorption. The thermodynamic parameter were evaluated: ∆G° = (−6.37)/(−9.23) kJ/mol, for temperature range: 20–60 °C; ∆H° = 14.57 kJ/mol and ∆S° = 71.48 J/mol K, the U(VI) adsorption being spontaneous and endothermic.

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Authors and Affiliations

  1. National Institute for Research and Development of Isotopic and Molecular Technologies, 67-103 Donat Str., 400293, Cluj-Napoca, Romania

    Cristina Marcu, Damian Axente & Ancuţa Balla

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  1. Cristina Marcu
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  2. Damian Axente
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  3. Ancuţa Balla
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Correspondence to Cristina Marcu.

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Marcu, C., Axente, D. & Balla, A. Kinetic and thermodynamic studies of U(VI) adsorption using Dowex-Marathon resin. J Radioanal Nucl Chem 305, 623–630 (2015). https://doi.org/10.1007/s10967-015-3959-y

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  • DOI: https://doi.org/10.1007/s10967-015-3959-y

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