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Uranium binding by biochar fibres derived from Luffa cylindrica after controlled surface oxidation

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Abstract

Controlled surface modification of biochar fibres derived from Luffa cylindrica sponges has been carried out by nitric acid and the degree of oxidation could be controlled by changing the acid concentration or the reaction time. The extent of surface oxidation has been quantified by acid–base titration and FTIR-spectroscopy. Furthermore, uranium binding has been studied as a function of various parameters and the experimental results show that even under strong acidic conditions the relative sorption is above 80 % and the sorption capacity of the biochar fibres for U(VI) at pH 3 is q max = 92 g kg−1.

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Acknowledgments

The authors would like to thank Mr. Argyris Ioannou for the supply of the Luffa cylindrica sponges.

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Authors and Affiliations

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

    Ioanna Liatsou, Georgia Michail, Marilena Demetriou & Ioannis Pashalidis

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  1. Ioanna Liatsou
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  2. Georgia Michail
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  3. Marilena Demetriou
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  4. Ioannis Pashalidis
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Correspondence to Ioannis Pashalidis.

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Liatsou, I., Michail, G., Demetriou, M. et al. Uranium binding by biochar fibres derived from Luffa cylindrica after controlled surface oxidation. J Radioanal Nucl Chem 311, 871–875 (2017). https://doi.org/10.1007/s10967-016-5063-3

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  • DOI: https://doi.org/10.1007/s10967-016-5063-3

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