Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution
1
Department of Nuclear Physics, Joint Institute for Nuclear Research, Joliot-Curie Str., 6, 1419890 Dubna, Russia
2
Department of Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, 30 Reactorului Str. MG-6, 76900 Bucharest-Magurele, Romania
3
Department of Chemistry, Faculty of Chemistry, Alexandru Ioan Cuza University of Iasi, Bld. Carol I, 11, 700506 Iasi, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Licínio M. Gando-Ferreira
Water 2021, 13(22), 3263; https://doi.org/10.3390/w13223263
Received: 26 October 2021
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Revised: 7 November 2021
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Accepted: 15 November 2021
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Published: 17 November 2021
(This article belongs to the Special Issue Wastewater Treatment: Membranes and Adsorptive Processes)
The adsorption capacity of two sorbents, silica SBA-15 and titanosilicate ETS-10, toward Ce(III) was tested. The obtained sorbents were characterized using X-ray diffraction, nitrogen adsorption-desorption, Scanning electron microscopy, and Fourier-transform infrared spectroscopy. The effects of solution acidity, cerium concentration, time of contact, and temperature on Ce(III) sorption were investigated. The maximum Ce(III) removal by silica SBA-15 was achieved at pH 3.0 and by titanosilicate ETS-10 at a pH range of 4.0–5.0. The Freundlich, Langmuir, and Temkin isotherm models were applied for the description of equilibrium sorption of Ce(III) by the studied absorbents. Langmuir model obeys the experimentally obtained data for both sorbents with a maximum sorption capacity of 68 and 162 mg/g for silica SBA-15 and titanosilicate ETS-10, respectively. The kinetics of the sorption were described using pseudo-first- and pseudo-second-order kinetics, Elovich, and Weber–Morris intraparticle diffusion models. The adsorption data fit accurately to pseudo-first- and pseudo-second-order kinetic models. Thermodynamic data revealed that the adsorption process was spontaneous and exothermic.
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Keywords:
sorption; cerium; silica SBA-15; titanosilicate ETS-10
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MDPI and ACS Style
Zinicovscaia, I.; Yushin, N.; Humelnicu, D.; Grozdov, D.; Ignat, M.; Demcak, S.; Humelnicu, I. Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution. Water 2021, 13, 3263. https://doi.org/10.3390/w13223263
AMA Style
Zinicovscaia I, Yushin N, Humelnicu D, Grozdov D, Ignat M, Demcak S, Humelnicu I. Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution. Water. 2021; 13(22):3263. https://doi.org/10.3390/w13223263
Chicago/Turabian StyleZinicovscaia, Inga, Nikita Yushin, Doina Humelnicu, Dmitrii Grozdov, Maria Ignat, Stefan Demcak, and Ionel Humelnicu. 2021. "Sorption of Ce(III) by Silica SBA-15 and Titanosilicate ETS-10 from Aqueous Solution" Water 13, no. 22: 3263. https://doi.org/10.3390/w13223263
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