Adsorption of caesium (Cs+) from aqueous solution by porous titanosilicate xerogels

Olga Oleksiienko, Irina Levchuk, Maciej Sitarz, Svitlana Meleshevych, Volodymyr Strelko, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Two types of titanosilicate (TiSi) materials were synthesized by the sol–gel method using pure and technical precursors. All samples obtained were characterized using X-ray diffraction, FTIR in the mid-region and the low-temperature nitrogen adsorption/desorption technique. The synthesized xerogels were found to be amorphous with a developed porous structure. Solution pH, sample mass, initial Cs+ concentration, competitive ions, contact time and temperature were studied for their influence on TiSi sorption ability. Both samples demonstrated a high capacity for caesium across a broad pH range of 2–12, and the adsorption isotherms were fitted to the Langmuir, Freundlich, Sips, Toth and Redlich–Peterson models, while the kinetic data were described using pseudo-first and pseudo-second models. All the TiSi samples were characterized by X-ray photoelectron spectroscopy and scanning electron microscopy with energy dispersive X-ray spectroscopy before and after the adsorption tests. Activated adsorption was proposed as a stage in the adsorption mechanism.

Original languageEnglish
Pages (from-to)5554-5566
Number of pages13
JournalDesalination and Water Treatment
Issue number12
Publication statusPublished - 8 Mar 2016
Externally publishedYes


  • Adsorption capacity
  • Kinetic study
  • Synthesis precursor
  • Titanosilicates
  • Xerogel pore structure

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Pollution


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