Aerosol Wall Loss in Teflon Film Chambers Filled with Ambient Air

  • Lee Seung-Bok (Air Resources Research Center, Korea Institute of science and Technology) ;
  • Bae Gwi-Nam (Air Resources Research Center, Korea Institute of science and Technology) ;
  • Moon Kil-Choo (Air Resources Research Center, Korea Institute of science and Technology)
  • Published : 2004.03.01

Abstract

Aerosol wall loss is an important factor affecting smog chamber experiments, especially with chambers made of Teflon film. In this work, the aerosol wall loss was investigated in 2.5 and $5.8-m^3$ cubic-shaped Teflon film chambers filled with ambient air. The natural change in the particle size distribution was measured using a scanning mobility particle sizer in a dark environment. The rate of aerosol wall loss was obtained from the deposition theory suggested by Crump and Seinfeld (1981). The measured rates of aero-sol wall loss were In a good agreement with the theoretical and experimental values given by McMurry and Rader (1985), implying that the electrostatic effect enhances particle deposition on the chamber wall. The significance of aerosol wall loss correction was demonstrated with the photochemical reaction experiments using the ambient air.

Keywords

References

  1. Bae, G.N., M.C. Kim, S.B. Lee, K.B. Song, H.C. Jin, and K.C. Moon (2003) Design and performance evaluation of the KIST indoor smog chamber, Journal of Korean Society for Atmospheric Environment, 19(4), 437-449 (in Korean)
  2. Behnke, W., W. Hollander, W. Koch, F. Nolting, and C. Zetzsch (1988) A smog chamber for studies of the photochemical degradation of chemicals in the presence of aerosols, Atmospheric Environment, 22(6), 1113-1120
  3. Cocker III, D.R., R.C. Flagan, and J.H. Seinfeld (2001) State-of-art chamber facility for studying atmospheric aerosol chemistry, Environmental Science and Technology, 35(12), 2594-2601
  4. Crump, J.G. and J.H. Seinfeld (1981) Turbulent deposition and gravitational sedimentation of an aerosol in a vessel of arbitrary shape, Journal of Aerosol Science, 12, 405-415
  5. Hurley, M.D., O. Sokolov, T.J. Wallington, H. Takekawa, M. Karasawa, B. Klotz, I. Barnes, and K.H. Becker (2001) Organic aerosol formation during the atmospheric degradation of toluene, Environmental Science and Technology, 35(7), 1358-1366
  6. Kim, M.C., G.N. Bae, K.C. Moon, and J.Y. Park (2004) Formation and growth of atmospheric aerosols by water vapor reactions in an indoor smog chamber (in Korean), Journal of Korean Society for Atmospheric Environment, 20(2), 161-174
  7. Liu, B.Y.H. and K.H. Ahn (1987) Particle deposition on semiconductor wafers, Aerosol Science and Technology, 6, 215-224
  8. McMurry, P.H. and D. Grosjean (1981) Gas and aerosol wall losses in Teflon film smog chambers, Environmental Science and Technology, 19(12), 1176-1182
  9. McMurry, P.H. and D.J. Rader (1985) Aerosol wall losses in electrically charged chambers, Aerosol Science and Technology, 4, 249-268
  10. Moon, K.C. et al. (2004) A Study on the Smog Mechanism and Control Technology, KIST Report M1-0204-00-0049 (UCN2595-7550-9)