Abstract
The sorbent prepared from Luffa cylindrica fibers modified with citric acid is studied as a new biosorbent for the recovery of uranium(VI) from aqueous solutions. The effect the pH of an aqueous solution, the phase contact time, and temperature have on the efficiency of U(VI) recovery into the sorbent phase is investigated. The kinetic dependences for the process of uranium(VI) sorption can be described by a pseudo-second order equation. The U(VI) adsorption isotherm is described by the Langmuir equation, and the maximum uranium sorption capacity of this sorbent is 204.3 mg/g. The possibility of reusing the sorbent in several cycles of sorption–desorption cycles is demonstrated.
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Funding
This work was performed as part of a State Task for the Institute of Solid State Physics and the Institute of Microelectronic Technology and High Purity Substances (2019). It was supported in part by the RF Ministry of Education and Science as part of the Program for Improving the Competitiveness of the National University of Science and Technology (MISiS) among the World’s Leading Scientific and Educational Centers for 2013–2020, no. K2-2016-070.
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Translated by E. Glushachenkova
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Turanov, A.N., Karandashev, V.K., Emel’chenko, G.A. et al. Sorption of U(VI) from Aqueous Solutions by Chemically Modified Luffa cylindrica Fibers. Russ. J. Phys. Chem. 94, 1471–1475 (2020). https://doi.org/10.1134/S0036024420070298
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DOI: https://doi.org/10.1134/S0036024420070298