Determination of octanol-air partition coefficients and supercooled liquid vapor pressures of PAHs as a function of temperature: Application to gas-particle partitioning in an urban atmosphere
ATMOSPHERIC ENVIRONMENT, cilt.40, sa.34, ss.6615-6625, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 40 Sayı: 34
- Basım Tarihi: 2006
- Doi Numarası: 10.1016/j.atmosenv.2006.05.051
- Dergi Adı: ATMOSPHERIC ENVIRONMENT
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.6615-6625
- Anahtar Kelimeler: PAHs, vapor pressure, octanol-air partition coefficient, gas/particle partitioning
- Dokuz Eylül Üniversitesi Adresli: Evet
Özet
Octanol-air partition coefficients (K-OA) for 14 polycyclic aromatic hydrocarbons (PAHs) were determined as a function of temperature using the gas chromatographic retention time method. log K-OA values at 25 degrees ranged over six orders of magnitude, between 6.34 (acenaphthylene) and 12.59 (dibenz[a,h]anthracene). The determined K-OA values were within factor of 0.7 (dibenz[a,h]anthracene) to 15.1 (benz[a]anthracene) of values calculated as the ratio of octanol-water partition coefficient to dimensionless Henry's law constant. Supercooled liquid vapor pressures (P-L) of 13 PAHs were also determined using the gas chromatographic retention time technique. Activity coefficients in octanol calculated using K-OA and P-L ranged between 3.2 and 6.2 indicating near-ideal solution behavior.