NDLI: Influence of temperature on the adsorption of α-tocopherol from ethanol solutions on acid-activated clinoptilolite tuff

Content Provider	Springer Nature Link
Author	Kotova, D. L. Vasilyeva, S. Yu. Krysava, T. A.
Copyright Year	2014
Abstract	Patterns in the adsorption of α-tocopherol on acid-activated clinoptilolite tuff at 283, 295, 305, and 333 K are established and explained. It is found that the selectivity of the sorbent toward the vitamin rises as the temperature of the process falls. The adsorption of α-tocopherol from dilute solutions is described in terms of the Langmuir adsorption theory. It is shown that the fixing of vitamin E monolayers in the structural matrix of clinoptilolite tuff is due to the formation of hydrogen bonds between isolated silanol groups of the adsorbent and oxygen atoms of the chromane ring and the phenol residue of α-tocopherol. The thermodynamic functions of monolayer adsorption of the vitamin are estimated. It is concluded that the formation of polymolecular layers in the form of associates is due to hydrophobic interactions between side substituents of α-tocopherol.
Starting Page	1403
Ending Page	1407
Page Count	5
File Format	PDF
ISSN	00360244
Journal	Russian Journal of Physical Chemistry
Volume Number	88
Issue Number	8
e-ISSN	1531863X
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-07-18
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	adsorption solutions clinoptilolite tuff α-tocopherol hydrophobic interactions Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry

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Influence of temperature on the adsorption of α-tocopherol from ethanol solutions on acid-activated clinoptilolite tuff