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

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 titrat...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2017, Vol.311 (1), p.871-875
Main Authors: Liatsou, Ioanna, Michail, Georgia, Demetriou, Marilena, Pashalidis, Ioannis
Format: Article
Language:English
Subjects:
Binding
Chemistry
Chemistry and Materials Science
Control surfaces
Diagnostic Radiology
Fibers
Fourier transforms
Hadrons
Heavy Ions
Inorganic Chemistry
Luffa cylindrica
Nitric acid
Nuclear Chemistry
Nuclear Physics
Oxidation
Oxidation-reduction reactions
Physical Chemistry
Reaction time
Sorption
Titration
Uranium
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Summary: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 .
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-016-5063-3