Removal of radionuclides from acidic solution by activated carbon impregnated with methyl- and carboxy-benzotriazoles.

Scientific Reports
Muna A Abu-DaloMark Hernandez

Abstract

The removal efficiencies of metals commonly used to model the fate and transport of aqueous uranium and radioactive its daughter products, were observed on activated carbons impregnated with different benzotriazole derivatives. Acidic solutions containing U(VI), Sr(II), Eu(III), and Ce(III) were used to determine the immobilization potential of carboxybenzotriazole (CBT) and methylbenzotriazole (MeBT), where these derivatives were sorbed to different types of granular activated carbon (GAC). This sorption behavior can be predicted by Redlich-Peterson model. Flow-through column tests showed that the immobilization of uranium and some of its daughter products, significantly improves in response to oxidized GACs saturated with carboxybenzotrzole (CBT), which reached a maximum elimination for U(VI) at 260 BV, Eu(III) at 114 BV, Ce(III) at 126 BV, and Sr(II) at 100. MeBT significantly desorbed from GAC under acidic conditions. Trace amounts of CBT were observed in some column effluents, but this did not appear to alter the effectiveness of metal removal, regardless of the model radionuclide studied. These results suggest that enhanced immobilization of selected metals on GAC, can be achieved by impregnating oxidized activated carbon...Continue Reading

References

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Citations

Sep 2, 2021·Journal of Molecular Modeling·Sílvio Quintino de Aguiar FilhoDouglas Henrique Pereira

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Methods Mentioned

BETA
scanning electron microscopy
GAC
electron microscopy

Software Mentioned

MRX
Pox

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