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The effect of EDTA on the desorption of uranium from calcium silicate hydrate matrices

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Abstract

The desorption of uranium from a U(VI)-contaminated C-S-H matrix has been investigated as a function of the EDTA concentration in solution under N2- and ambient atmosphere. The Kd values evaluated from the experimental data indicate that U(VI) is retarded in the solid phase due to sorption of EDTA through interaction with U(VI) at the C-S–H surface. On the other hand, under ambient conditions the formation of stable U(VI)-carbonato species results in higher U(VI) concentration in solutions compared to corresponding systems under N2-atmosphere.

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Acknowledgements

The project leading to this application has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 847593.

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  1. Department of Chemistry, University of Cyprus, P. O. Box 20537, CY-1678, Nicosia, Cyprus

    Eleni Maragkou & Ioannis Pashalidis

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  1. Eleni Maragkou
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  2. Ioannis Pashalidis
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Correspondence to Ioannis Pashalidis.

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Maragkou, E., Pashalidis, I. The effect of EDTA on the desorption of uranium from calcium silicate hydrate matrices. J Radioanal Nucl Chem 331, 507–510 (2022). https://doi.org/10.1007/s10967-021-08089-w

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  • DOI: https://doi.org/10.1007/s10967-021-08089-w

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