Synthesis and application of hydride silica composites for rapid and facile removal of aqueous mercury

Kseniia V. Katok, Raymond L.D. Whitby, Franck Fayon, Sylvie Bonnamy, Sergey V. Mikhalovsky, Andrew B. Cundy

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The adsorption of ionic mercury(II) from aqueous solution on functionalized hydride silicon materials was investigated. The adsorbents were prepared by modification of mesoporous silica C-120 with triethoxysilane or by converting alkoxysilane into siloxanes by reaction with acetic acid. Mercury adsorption isotherms at 20 °C are reported, and maximum mercury loadings were determined by Langmuir fitting. Adsorbents exhibited efficient and rapid removal of ionic mercury from aqueous solution, with a maximum mercury loading of approximately 0.22 and 0.43 mmol of Hg g-1 of silica C-120 and polyhedral oligomeric silsesquioxane (POSS) xerogel, respectively. Adsorption efficiency remained almost constant from pH 2.7 to 7. These inexpensive adsorbents exhibiting rapid assembly, low pH sensitivity, and high reactivity and capacity, are potential candidates as effective materials for mercury decontamination in natural waters and industrial effluents. Catch you because I can: Hydride silica adsorbents show efficient and rapid redox-driven removal of ionic mercury from aqueous solution, such as in natural waters and industrial effluents, with a maximum mercury loading of approximately 0.22 and 0.43 mmol of Hg g-1 on mesoporous silica C-120 and polyhedral oligomeric silsesquioxane xerogels, respectively. Adsorption efficiency remains almost constant from pH 2.7 to 7.

Original languageEnglish
Pages (from-to)4126-4133
Number of pages8
JournalChemPhysChem
Volume14
Issue number18
DOIs
Publication statusPublished - Dec 16 2013

Keywords

  • adsorption
  • hydride silica
  • mercury
  • rapid uptake
  • water remediation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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