Triet Truong - Atmospheric polycyclic aromatic hydrocarbon profiles and sources in pine needles and particulate matter in Dayton, Ohio, USA

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  Publication Details (including relevant citation   information):

    Tomashuk, T. A., Truong, T. M., Mantha, M., & McGowin, A. E.   (2012). Atmospheric Polycyclic Aromatic Hydrocarbon Profiles in   Pine Needles and Particulate Matter and Their Temporal Variations   in Dayton, Ohio, USA.   Atmospheric Environment, 51,   196-202.


    Polycyclic aromatic hydrocarbons (PAHs) were measured in pine   needles (passive sampling) and on high-volume particulate matter   (PM) filters (active sampling) over a period of eight to ten   months at two separate sites in the Dayton, Ohio, USA   metropolitan area: Moraine and Yellow Springs. Total PAH   concentrations for PM ranged from 77.4μgg-1    to 837μgg-1    (dry wt.) at both sites with high molecular weight PAHs being the   predominant form that tended to be higher in concentration during   the colder months. Total PAH concentrations for pine needles   varied by tree species and location. With an average   concentration of 4187ngg−1,   Austrian pine (Pinus   nigra)   needles in Moraine ranged from 2543ngg−1    to 6111ngg−1    (dry wt.) with the lowest and highest concentrations occurring in   October and August, respectively. The amount of phenanthrene was   extremely high for August, 4200±112, which could have resulted   from the close proximity of the tree to the parking lot at a   firehouse. White pine (Pinus   strobus)   needles in Yellow Springs had an average concentration of   384ngg−1and   ranged from 127ngg−1    to 589ngg−1    (dry wt.) with September and November, respectively, having the   lowest and highest PAH concentrations. The 2- and 3-ring PAHs   were the predominant form in   P. nigra,   while the 4-ring PAHs predominated in   P. strobus.   Total PAH concentrations in   P. nigra   were an order of magnitude greater than for   P. strobus.   A bivariate plot of BaA/(BaA+Chry) versus Flt(Flt+Pyr) allowed   the PM and pine needle data to be included in the same source   analysis and indicated sources of PM at both sites were biomass   and/or coal combustion. This plot also suggested PAHs in Yellow   Springs   P. strobus   originated from petroleum combustion sources, whereas PAHs in   Moraine   P. nigra   originated from petroleum combustion with some sources more aged   or remote.

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