Removal of gas-phase elemental mercury by iodine- and chlorine-impregnated activated carbons

Sung Jun Lee, Yong Chil Seo, Jongsoo Jurng, Tai Gyu Lee

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153 Citations (Scopus)


Gas-phase Hg0 adsorption experiments were carried out using iodine (I)- and chorine (Cl)-impregnated granular activated carbons in a laboratory-scale fixed-bed reactor. To verify the effect of chemical loading contents on removal of mercury, different concentrations of chemicals such as KI and HCl were applied. In addition, two types of impregnated activated carbons (ACs) were tested at different temperature conditions. The characteristics of impregnated ACs were analyzed using scanning electron microscopy/energy- dispersive spectroscopy for surface morphology and chemical contents. BET analysis for surface area and X- ray spectroscopy for identification of mercury compounds on the carbon surface were conducted. Hg0 removal efficiency increased with temperature in the case of I-impregnated ACs, while the removal efficiency decreased with temperature for Cl-impregnated ACs. According to increasing chemical content, the surface area decreased and the morphology of carbon became more complicated. Both types of impregnated ACs showed reasonable efficiency for gas-phase Hg0 removal by adsorption.

Original languageEnglish
Pages (from-to)4887-4893
Number of pages7
JournalAtmospheric Environment
Issue number29
Publication statusPublished - 2004 Sept

Bibliographical note

Funding Information:
This work was supported by the Post-doctoral Fellowship Program of Korea Science & Engineering Foundation (KOSEF).

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Atmospheric Science


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