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Removal of U (VI) from acidic and alkaline aqueous solutions by zero-valent iron nanoparticles


Removal of uranium (VI) from aqueous solutions by zero-valent iron nanoparticles (nZVI) was investigated in both acidic and alkaline solutions in absence and presence of counter-ions (0.1 M NaNO3). Langmuir and Freundlich equations were applied to model the sorption isotherms whereas the data obtained at 15, 25, 35 and 45 °C from the kinetic experiments were successfully reproduced by a pseudo-second order equation and used for calculation of thermodynamic parameters. Electron microscopy (SEM/EDS), X-ray photoelectron spectroscopy and UV-Fluorescence were applied to explore possible mechanisms. The U-removal seems to be due mainly to sorption followed by U(VI) reduction.

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Professor Eleni Pavlidou from the Physics Department of the Aristotle University is gratefully acknowledged for helping with the SEM/EDS study.

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Correspondence to Fotini Noli.

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Noli, F., Babaiti, A., Misaelides, P. et al. Removal of U (VI) from acidic and alkaline aqueous solutions by zero-valent iron nanoparticles. J Radioanal Nucl Chem 318, 2107–2115 (2018).

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  • Uranium
  • Zero-valent iron
  • Sorption
  • Mechanism