PM-10 high-volume collection and quantitation of semi- and nonvolatile phenols, methoxylated phenols, alkanes, and polycyclic aromatic hydrocarbons from winter urban air and their relationship to wood smoke emissions

1992 ◽  
Vol 26 (11) ◽  
pp. 2251-2262 ◽  
Author(s):  
Steven B. Hawthorne ◽  
David J. Miller ◽  
John J. Langenfeld ◽  
Mark S. Krieger
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
High Volume ◽  
Wood Smoke ◽  
Urban Air ◽  
Polycyclic Aromatic ◽  
Pm 10

Assessing human exposure to PM 10 -bound polycyclic aromatic hydrocarbons during fireworks displays

2017 ◽  
Vol 8 (5) ◽  
pp. 816-827 ◽  
Author(s):  
Siwatt Pongpiachan ◽  
Mattanawadee Hattayanone ◽  
Oramas Suttinun ◽  
Chukkapong Khumsup ◽  
Itthipon Kittikoon ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Human Exposure ◽  
Polycyclic Aromatic ◽  
Fireworks Displays ◽  
Pm 10

scholarly journals Depletion of gaseous polycyclic aromatic hydrocarbons by a forest canopy

2008 ◽  
Vol 8 (14) ◽  
pp. 4105-4113 ◽  
Author(s):  
S.-D. Choi ◽  
R. M. Staebler ◽  
H. Li ◽  
Y. Su ◽  
B. Gevao ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Forest Canopy ◽  
Sampling Site ◽  
High Volume ◽  
Early Spring ◽  
Eastern United States ◽  
Leaf Emergence ◽  
Deposition Velocities ◽  
Polycyclic Aromatic

Abstract. Rapid uptake of gaseous polycyclic aromatic hydrocarbons (PAHs) by a forest canopy was observed at Borden in Southern Ontario, Canada during bud break in early spring 2003. High volume air samples were taken on 12 individual days at three different heights (44.4, 29.1, and 16.7 m) on a scaffolding tower and on the forest floor below the canopy (1.5 m). Concentrations of PAHs were positively correlated to ambient temperature, resulting from relatively warm and polluted air masses passing over the Eastern United States and Toronto prior to arriving at the sampling site. An analysis of vertical profiles and gas/particle partitioning of the PAHs showed that gaseous PAHs established a concentration gradient with height, whereas levels of particulate PAHs were relatively uniform, implying that only the uptake of gaseous PAHs by the forest canopy was sufficiently rapid to be observed. Specifically, the gaseous concentrations of intermediate PAHs, such as phenanthrene, anthracene, and pyrene, during budburst and leaf emergence were reduced within and above the canopy. When a gradient was observed, the percentage of PAHs on particles increased at the elevations experiencing a decrease in gas phase concentrations. The uptake of intermediate PAHs by the canopy also led to significant differences in gaseous PAH composition with height. These results are the most direct evidence yet of the filter effect of forest canopies for gaseous PAHs in early spring. PAH deposition fluxes and dry gaseous deposition velocities to the forest canopy were estimated from the concentration gradients.

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