Interaction of cadmium nitrate with the surface of functionalized organosilicas

The adsorption of Cd II cations on the surface of amorphous macroporous silicas chemically modified by β-cyclodextrin and its functional derivatives was studied. The adsorption of Cd II cations was shown to follow the equation of the Freundlich isotherm for the heterogeneous surface. Analysis of the...

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Bibliographic Details
Published in:Russian chemical bulletin 2010-11, Vol.59 (11), p.2047-2054
Main Authors: Belyakova, L. A., Shvets, A. N.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
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Inorganic Chemistry
Organic Chemistry
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Summary:The adsorption of Cd II cations on the surface of amorphous macroporous silicas chemically modified by β-cyclodextrin and its functional derivatives was studied. The adsorption of Cd II cations was shown to follow the equation of the Freundlich isotherm for the heterogeneous surface. Analysis of the adsorption kinetic curves showed that two parallel processes occurred on the surface of β-cyclodextrin-containing silicas. A substantial increase in the adsorption of Cd(NO 3 ) 2 is a result of the formation of uncharged supramolecular structures on the surface of silica adsorbents. The composition of these structures depends on the polarizability of functional substituents of β-cyclodextrins.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-010-0353-3