Temporal trends of atmospheric PAHs: Implications for the gas-particle partition

Zhu, Fu-Jie; Ma, Wan–Li; Liu, Liyan; Zhang, Zi-Feng; Song, Weiwei; Hu, Peng-Tuan; Li, Wenlong; Qiao, Liping; Fan, Hui-Ze

doi:10.1016/j.atmosenv.2021.118595

Cited by 6 publications

(1 citation statement)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates a stronger tendency for PAHs to adhere to particles in the cold seasons, which was consistent with previous studies. 17,45,58 There was also a more frequent and more significant underestimation of congeners with lower log K OA in cold seasons; in contrast, there was a more significant overprediction of congeners with higher log K OA in warm seasons (Figure 3). The deviation may have been due to the uncertainty of the heterogeneous composition of atmospheric aerosols (levels of organic and elemental carbon) 59 due to temperature changes.…”

Section: Comparison Of Seasons Andmentioning

confidence: 98%

Land–Ocean Exchange Mechanism of Chlorinated Paraffins and Polycyclic Aromatic Hydrocarbons with Diverse Sources in a Coastal Zone Boundary Area, North China: The Role of Regional Atmospheric Transmission

Jiang

Wang

et al. 2022

Environ. Sci. Technol.

View full text Add to dashboard Cite

The marine environment is regarded as a crucial "sink" of numerous land-origin pollutants. As typical boundary regions, the coastal and offshore areas are used to evaluate the dominating transfer process and land−ocean exchange mechanism of semivolatile organic compounds. In air samples collected from a coastal area in North China over a whole year, chlorinated paraffins (CPs), including short-chain CPs and medium-chain CPs, and prior control 16 polycyclic aromatic hydrocarbons (PAHs) were determined, with mean concentrations of 25.8 and 94.7 ng/m 3 , respectively. Results of different gas−particle partitioning models indicated that the steady-state hypothesis provides a better description of the possible land−ocean exchange molecular mechanism. The source−sink influences for CPs and PAHs were affected by the predominant atmospheric motion, which alternated between gaseous diffusion and particulate sedimentation in different seasons. Source apportionment results indicated that different transfer characteristics contributed to the source divergence of ambient CPs and PAHs within 12 nautical miles in the same area. Coal/biomass combustion and diesel/natural gas combustion were the main PAH sources in the coast site (43.1%) and sea site (35.3%), respectively. Similar industrial sources CP-52 and CP-42 were the main CP sources in the coast site (41.4%) and sea site (40.8%), respectively.

show abstract

Section: Comparison Of Seasons Andmentioning

confidence: 98%