Secondary formation of nitrated phenols: insights from observations during the Uintah Basin Winter Ozone Study (UBWOS) 2014
Item
Title (Dublin Core)
Secondary formation of nitrated phenols: insights from observations during the Uintah Basin Winter Ozone Study (UBWOS) 2014
Description (Dublin Core)
We describe the results from online measurements of nitrated phenols using a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) with acetate as reagent ion in an oil and gas production region in January and February of 2014. Strong diurnal profiles were observed for nitrated phenols, with concentration maxima at night. Based on known markers (CH<sub>4</sub>, NO<sub><i>x</i></sub>, CO<sub>2</sub>), primary emissions of nitrated phenols were not important in this study. A box model was used to simulate secondary formation of phenol, nitrophenol (NP), and dinitrophenols (DNP). The box model results indicate that oxidation of aromatics in the gas phase can explain the observed concentrations of NP and DNP in this study. Photolysis was the most efficient loss pathway for NP in the gas phase. We show that aqueous-phase reactions and heterogeneous reactions were minor sources of nitrated phenols in our study. This study demonstrates that the emergence of new ToF-CIMS (including PTR-TOF) techniques allows for the measurement of intermediate oxygenates at low levels and these measurements improve our understanding on the evolution of primary VOCs in the atmosphere.
Creator (Dublin Core)
Yuan, Bin
Liggio, John
Wentzell, Jeremy
Li, Shao-Meng
Stark, Harald
Roberts, James M.
Gilman, Jessica
Lerner, Brian
Warneke, Carsten
Li, Rui
Leithead, Amy
Osthoff, Hans D.
Wild, Robert
Brown, Steven S.
Gouw, Joost A.
Date (Dublin Core)
2018-09-18
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-16-2139-2016
https://acp.copernicus.org/articles/16/2139/2016/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
