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|Title:||Fast formation of nitro-pahs in the marine atmosphere constrained in a regional-scale lagrangian field experiment||Authors:||Mulder, Marie D.
Sofuoğlu, Sait Cemil
Polycyclic aromatic hydrocarbons
|Issue Date:||Aug-2019||Publisher:||American Chemical Society||Source:||Mulder, M. D., Dumanoğlu, Y., Efstathiou, C., Kukucka, P., Matejovicova, J., ...Lammel, G. (2019). Fast formation of nitro-pahs in the marine atmosphere constrained in a regional-scale lagrangian field experiment. Environmental Science and Technology, 53(15), 8914-8924. doi:10.1021/acs.est.9b03090||Abstract:||Polycyclic aromatic hydrocarbons (PAHs) and some of their nitrated derivatives, NPAHs, are seemingly ubiquitous in the atmospheric environment. Atmospheric lifetimes may nevertheless vary within a wide range, and be as short as a few hours. The sources and sinks of NPAH in the atmosphere are not well understood. With a Lagrangian field experiment and modeling, we studied the conversion of the semivolatile PAHs fluoranthene and pyrene into the 2-nitro derivatives 2-nitrofluoranthene and 2-nitropyrene in a cloud-free marine atmosphere on the time scale of hours to 1 day between a coastal and an island site. Chemistry and transport during several episodes was simulated by a Lagrangian box model i.e., a box model coupled to a Lagrangian particle dispersion model, FLEXPART-WRF. It is found that the chemical kinetic data do capture photochemical degradation of the 4-ring PAHs under ambient conditions on the time scale of hours to 1 day, while the production of the corresponding NPAH, which sustained 2-nitrofluoranthene/fluoranthene and 2-nitropyrene/pyrene yields of (3.7 ± 0.2) and (1.5 ± 0.1)%, respectively, is by far underestimated. Predicted levels of NPAH come close to observed ones, when kinetic data describing the reactivity of the OH-adduct were explored by means of theoretically based estimates. Predictions are also underestimated by 1-2 orders of magnitude, when NPAH/PAH yields reported from laboratory experiments conducted under high NOx conditions are adopted for the simulations. It is concluded that NPAH sources effective under low NOx conditions, are largely underestimated.||URI:||https://doi.org/10.1021/acs.est.9b03090
|Appears in Collections:||Chemical Engineering / Kimya Mühendisliği|
Environmental Engineering / Çevre Mühendisliği
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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