Formaldehyde removal efficiency using nano-size carbon colloids

Seon Hong Kim, Ki Hoon Lee, Do Hyeon Kim, Jong Pill Park, Ji Hoon Kim, Seung Yeon Cho

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


The purpose of this study was to assess the removal efficiency of formaldehyde using nano-size carbon colloid (NCC), which was produced by a comparatively easy and cheap method. In this study, nano-size carbon colloid based on water was produced by an electro-chemical method. The particles which have mostly a spherical shape with a diameter of, what is called, "nano-size" were produced. Non-woven fabric filter, which is currently on the market as a medium filter, was used for the removal efficiency test. Known concentration (0.5 ppm) of formaldehyde standard gas was used as a pollutant. The overall results indicate that: (1) nano-size carbon colloid which has a stable dispersibility, and of which diameter is approximately 10 nm or less was produced; (2) filters treated with nano-size carbon colloids showed a higher removal efficiency, 44.47 μg of HCHO removed/g of carbon and 19.28 μg of HCHO removed/g of carbon when compared to the control experiment using a normal carbon filter. The normal carbon filter system could only achieve 1.45 μg of HCHO removed/g of carbon.

Original languageEnglish
Pages (from-to)837-844
Number of pages8
JournalIndoor and Built Environment
Issue number6
Publication statusPublished - 2012 Dec

All Science Journal Classification (ASJC) codes

  • Public Health, Environmental and Occupational Health
  • Building and Construction


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