Particle and Aerosol Research Vol. 1, No. 1, December 2005 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Partitioning of persistent organic pollutants measured at Gosan between 2001 and 2002
±è Á¤ ¾Æ∙±è ¿ë Ç¥*
Abstracts
Persistent Organic Pollutants (POPs) are mostly semi-volatile organic pollutants and can be distributed between
the gas and particle phase. Gas/particle partitioning of POPs can be affected by several factors such as contaminant
levels in the atmosphere or meteorological parameters, especially, atmospheric temperature. In this study, the
atmospheric concentrations of POPs were measured at Gosan during three intensive measurement periods (Nov.
2001, Mar.~Apr. 2002, and Aug.~Sep. 2002). The characteristic of gas/particle partitioning of PAHs is
considered as linear regression of the log (gas/particle partitioning coefficient, KP) and log (liquid vapor pressure,
PL) both among the intensive measurement periods and between the polluted and non-polluted period. The mean
slope values derived from those subgroup data sets show no statistical difference. However, the y-intercept values
showed statistically meaningful differences. The variation of the y-intercept values might be affected by several
factors such as the particle concentration, gas-particle ratio, and absorption of PAHs onto organic carbons. It was
suggested that the POPs observed at Gosan were not in equilibrium. The temperature dependence of atmospheric
gas phase POPs, when expressed as linear regressions of the log (Kp) versus log (PL) for DDT, showed high
correlation (r2 = 0.968). Therefore, it is reasonable to expect that DDT might be emitted from soil, water, or
surface when the atmospheric temperature is high (secondary emissions).
File
4-°í»ê(21-29).pdf
Download