Journal of Sol-Gel Science and Technology

, Volume 86, Issue 1, pp 34–41 | Cite as

Some aspects of estimation of extraction selectivity under the conditions of competitive sorption on modified silica gels

  • Dzhamilya N. Konshina
  • Zaual A. Temerdashev
  • Valeriy V. Konshin
Original Paper: Characterization methods of sol-gel and hybrid materials


Systematic studies of silica gels with covalently immobilized thiosemicarbazide and formazan groups under the conditions of competitive sorption from multicomponent systems were conducted. A methodological approach to determine the selectivity of the modified sorption material with regard to Cu(II), Ni(II), Co(II), Cd(II), and Zn(II) was proposed. Solid-phase extraction in equilibrium conditions of Cu(II), Zn(II), Co(II), Cd(II), and Ni(II) on a silica gel with covalently immobilized thiosemicarbazide and formazan groups in the conditions of competitive sorption was studied. The possibility to use the pseudo-second-order kinetic equation for assessment of mutual influence at competitive sorption has been shown. We found that sorption from multicomponent solutions proceeds as a non-additive process under the conditions of an excess of functional groups.


Adsobtion capacity Multicomponent sorbtion Silica gel Surface modification Thiosemicarbazide Formazan 



This publication was financially supported by the Russian Ministry of Education and Science (project no. 4.4892.2017/8.9). This work was accomplished with the use of the scientific equipment of the Centre of Collective Employment “Ecoanalytical Centre”, Kuban State University (RFMEFI59317Х0008).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Chemistry and High TechnologiesKuban State UniversityKrasnodarRussia

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