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Desingn of mercury (II) adsorption sites on high disperse silica surface

Adsorption has been sutied of Hg (II) ions with hydroxylated silica, aminopropylsilica, and silicas chemically modified with b-cyclodextrin derivatives. The kinetics of Hg (II) adsorption as tested within the Lagergren model for the pseudo-first and pseudo-second order proc...

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Date:2008
Author Affiliations:
  • L. A. Belyakova — Інститут хімії поверхні ім. О.О. Чуйка Національної академії наук України
  • D. Yu. Lyashenko — Інститут хімії поверхні ім. О.О. Чуйка Національної академії наук України
  • O. M. Shvets — Інститут хімії поверхні ім. О.О. Чуйка Національної академії наук України
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Main Authors: Belyakova, L. A., Lyashenko, D. Yu., Shvets, O. M.
Format: Article
Language:Russian
Published: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2008
Online Access:https://surfacezbir.com.ua/index.php/surface/article/view/282
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Journal Title:Surface
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Summary:Adsorption has been sutied of Hg (II) ions with hydroxylated silica, aminopropylsilica, and silicas chemically modified with b-cyclodextrin derivatives. The kinetics of Hg (II) adsorption as tested within the Lagergren model for the pseudo-first and pseudo-second order processes, the adsorption isotherms being fitted to the Freundlich and Langmuir equations. The β-cyclodextrin-containing adsorbents were found to have high affinities to Hg (II) due to “ β-cyclodextrin – nitrate-ion” inclusion complexes and super molecules formed on their surfaces. The chemical composition of super molecules correlates with stability of mercury (II)  surface complexes.

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