Please use this identifier to cite or link to this item: https://elar.usfeu.ru/handle/123456789/9031
Title: Extracting Vanadium, Molybdenum, and Tungsten from Acidic Solutions via Adsorption on Modified Montmorillonite
Authors: Ordinartsev, D. P.
Sviridov, A. V.
Sviridov, V. V.
Issue Date: 2018
Publisher: Pleiades Publishing
Citation: Ordinartsev, D. P. Extracting Vanadium, Molybdenum, and Tungsten from Acidic Solutions via Adsorption on Modified Montmorillonite / D. P. Ordinartsev, A. V. Sviridov, V. V. Sviridov // Russian Journal of Physical Chemistry A. – 2018. – Vol. 92. – Iss. 10. – P. 2060-2064.
Abstract: Abstract: The possibility of extracting vanadium, molybdenum, and tungsten compounds from acidic media via adsorption is demonstrated. Highly dispersed layered aluminosilicates, modified with a cationic surfactant (didecyldimethylammonium chloride), are used as sorbents. Interactions between the cationic surfactant and the sorbent’s surface are confirmed by means of spectroscopy. It is established that the sorbent is modified through immobilization of the didecyldimethylammonium chloride molecules in the interlayer space of the sorbent. It is observed that the sorbent’s surface acquires a positive charge as a result of modification, allowing adsorption of polyoxoanions of vanadium, tungsten, and molybdenum from solutions. Spectroscopic and thermodynamic investigations show that the interaction between the vanadium and the active centers of the sorbent was due to the formation of ionic associates and corresponded to physical adsorption. Because of the similarities between the chemical properties of vanadate, molybdate, and tungstate ions, their adsorption on a surface of modified montmorillonite is governed by a similar mechanism. Experimentally determined limiting adsorption values of vanadium, molybdenum, and tungsten are 1.65, 1.96, and 1.21 mmol/g, respectively, which corresponds to a 94–95% degree of extraction. It is established that the optimum conditions of isolation are found at рН 3.4 for vanadium, pH 4.0 for molybdenum, and pH 4.5 for tungsten, due to the different forms of their polyoxoanions in solutions. © 2018, Pleiades Publishing, Ltd.
Keywords: INTERCALATION SYNTHESIS
MONTMORILLONITE
SORBENT
SORPTION THERMODYNAMIC PARAMETERS
VANADIUM, MOLYBDENUM, AND TUNGSTEN SORPTION
ADSORPTION
CATIONIC SURFACTANTS
CHLORINE COMPOUNDS
CLAY MINERALS
DYES
MOLYBDENUM COMPOUNDS
NEGATIVE IONS
SORBENTS
VANADIUM
CHLORIDE MOLECULES
DEGREE OF EXTRACTION
INTERLAYER SPACES
MODIFIED MONTMORILLONITE
OPTIMUM CONDITIONS
PHYSICAL ADSORPTION
SORPTION THERMODYNAMICS
THERMODYNAMIC INVESTIGATION
TUNGSTEN COMPOUNDS
URI: http://elar.usfeu.ru/handle/123456789/9031
DOI: 10.1134/S0036024418100229
SCOPUS: 2-s2.0-85053638607
WoS: WOS:000445213300032
RSCI: 35736161
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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