10.1021/acs.est.8b04523.s001
Guancong Huang
Guancong
Huang
Ying Liu
Ying
Liu
Min Shao
Min
Shao
Yue Li
Yue
Li
Qi Chen
Qi
Chen
Yan Zheng
Yan
Zheng
Zhijun Wu
Zhijun
Wu
Yuechen Liu
Yuechen
Liu
Yusheng Wu
Yusheng
Wu
Min Hu
Min
Hu
Xin Li
Xin
Li
Sihua Lu
Sihua
Lu
Chenjing Wang
Chenjing
Wang
Junyi Liu
Junyi
Liu
Mei Zheng
Mei
Zheng
Tong Zhu
Tong
Zhu
Potentially
Important Contribution of Gas-Phase Oxidation
of Naphthalene and Methylnaphthalene to Secondary Organic Aerosol
during Haze Events in Beijing
American Chemical Society
2019
Important Contribution
Phthalic anhydride
F p
Beijing Naphthalene
MN
Gas-Phase Oxidation
particle phase
contribution of Nap
generation product
gas-phase photooxidation products
aerosol phase
precursor consumption-based methods
2- ring PAHs
OA mass loadings
SOA formation
Secondary Organic Aerosol
tracer product-based
phthalic anhydride
2016 winter
Proton Transfer Reaction-Quadrupole interface Time-of-Flight Mass Spectrometer
high-NO x conditions
laboratory chamber experiments
ambient SOA
Haze Events
2- formylcinnamaldehyde
wintertime haze
2019-01-09 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Potentially_Important_Contribution_of_Gas-Phase_Oxidation_of_Naphthalene_and_Methylnaphthalene_to_Secondary_Organic_Aerosol_during_Haze_Events_in_Beijing/7624301
Naphthalene
(Nap) and methylnaphthalene (MN) are the most abundant
polycyclic aromatic hydrocarbons (PAHs) in atmosphere and have been
proposed to be important precursors of anthropogenic secondary organic
aerosol (SOA) derived from laboratory chamber experiments. In this
study, atmospheric Nap/MN and their gas-phase photooxidation products
were quantified by a Proton Transfer Reaction-Quadrupole interface
Time-of-Flight Mass Spectrometer (PTR-QiTOF) during the 2016 winter
in Beijing. Phthalic anhydride, a late generation product from Nap
under high-NO<sub><i>x</i></sub> conditions, appeared to
be more prominent than 2-formylcinnamaldehyde (early generation product),
possibly due to more sufficient oxidation during the haze. 1,2-Phthalic
acid (1,2-PhA), the hydrated form of phthalic anhydride, was capable
of partitioning into aerosol phase and served as a tracer to explore
the contribution of Nap to ambient SOA. The measured fraction in particle
phase (<i>F</i><sub>p</sub>) of 1,2-PhA averaged at 73 ±
13% with OA mass loadings of 52.5–87.8 μg/m<sup>3</sup>, lower than the value predicted by the absorptive partitioning model
(100%). Using tracer product-based and precursor consumption-based
methods, 2-ring PAHs (Nap and MN) were estimated to produce 14.9%
(an upper limit) of the SOA formed in the afternoon during the wintertime
haze, suggesting a comparable contribution of Nap and MN with
monocyclic-aromatics on urban SOA formation.