Removal and recovery of mercury from aqueous solution using magnetic silica nanocomposites

Bo Yune Song, Yujin Eom, Tai Gyu Lee

Research output: Contribution to journalArticlepeer-review

82 Citations (Scopus)


Thiol-functionalized magnetic silica nanocomposite was synthesized and tested for its mercury pick-up capability in aqueous solution. Magnetic property was to be utilized upon the collection of the adsorbents and the recovery adsorbed Hg by subsequent separation process. Cobalt ferrite nanoparticle, the core of magnetic silica nanocomposite, was synthesized using a thermal decomposition method and grown to a particle having an average size of 13 nm. The dispersed nanoparticles were then further arranged into spherical groups using a nanoemulsion method to enhance the reactivity toward magnets followed by tetraethyl orthosilicate coating using a modified Stöber method. The pore structure was modified by an additional coating of cetyltrimethylammonium bromide and tetraethyl orthosilicate. Finally, the surface of the magnetic silica nanocomposite was functionalized with thiol group. When tested for mercury adsorption capacity, a sufficiently high Hg adsorption capacity of 19.79 mg per g of adsorbent was obtained at room temperature and a pH of 5.5.

Original languageEnglish
Pages (from-to)4754-4759
Number of pages6
JournalApplied Surface Science
Issue number10
Publication statusPublished - 2011 Mar 1

Bibliographical note

Funding Information:
This work was supported by Ministry of Environment as the Eco-Technopia 21 project (No. 2007-01003-0059-0 ) and by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2009-0079977 ).

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • Condensed Matter Physics
  • General Physics and Astronomy
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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