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

ODABAŞI M., Cetin E., Sofuoglu A.

ATMOSPHERIC ENVIRONMENT, cilt.40, sa.34, ss.6615-6625, 2006 (SCI-Expanded) identifier identifier

  • 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, POLYCYCLIC AROMATIC-HYDROCARBONS, CHROMATOGRAPHIC RETENTION TIMES, POLYBROMINATED DIPHENYL ETHERS, POLYCHLORINATED NAPHTHALENES, ORGANIC-COMPOUNDS, LAW CONSTANTS, SOOT CARBON, K-OA, CHLOROBENZENES, BIPHENYLS
  • 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.