Partitioning of Organonitrates in the Production of Secondary Organic Aerosols from α-Pinene Photo-Oxidation

Aruffo，Eleonora1,2; Wang，Junfeng3; Ye，Jianhuai4; Ohno，Paul5; Qin，Yiming6; Stewart，Matthew5; Mckinney，Karena7; Di Carlo，Piero1,2; Martin，Scot T.5,8

2021

10.1021/acs.est.1c08380

ENVIRONMENTAL SCIENCE & TECHNOLOGY   影响因子和分区

0013-936X

1520-5851

The chemical pathways for the production of secondary organic aerosols (SOA) are influenced by the concentration of nitrogen oxides (NOx), including the production of organonitrates (ON). Herein, a series of experiments conducted in an environmental chamber investigated the production and partitioning of total organonitrates from α-pinene photo-oxidation from <1 to 24 ppb NOx. Gas-phase and particle-phase organonitrates (gON and pON, respectively) were measured by laser-induced fluorescence (LIF). The composition of the particle phase and the particle mass concentration were simultaneously characterized by online aerosol mass spectrometry. The LIF and MS measurements of pON concentrations had a Pearson correlation coefficient of 0.91 from 0.3 to 1.1 μg m-3. For 1-6 ppb NOx, the yield of SOA particle mass concentration increased from 0.02 to 0.044 with NOx concentration. For >6 ppb NOx, the yield steadily dropped, reaching 0.034 at 24 ppb NOx. By comparison, the yield of pON steadily increased from 0.002 to 0.022 across the range of investigated NOx concentrations. The yield of gON likewise increased from 0.005 to 0.148. The gas-to-particle partitioning ratio (pON/(pON + gON)) depended strongly on the NOx concentration, changing from 0.27 to 0.13 as the NOx increased from <1 to 24 ppb. In the atmosphere, there is typically a cross-over point between clean and polluted conditions that strongly affects SOA production, and the results herein quantitatively identify 6 ppb NOx as that point for α-pinene photo-oxidation under these study conditions, including the production and partitioning of organonitrates. The trends in SOA yield and partitioning ratio as a function of NOx occur because of the changes in pON volatility.

AMS chamber experiments organonitrates SOA TDLIF α-pinene

EI

英语

NI论文

其他

20221712041065

Aerosols ; Correlation methods ; Environmental chambers ; Mass spectrometry ; Monoterpenes ; Nitrogen oxides ; Oxidation

Chemistry:801 ; Chemical Reactions:802.2 ; Organic Compounds:804.1 ; Inorganic Compounds:804.2 ; Mathematical Statistics:922.2

ENVIRONMENT/ECOLOGY

2-s2.0-85128844514

Scopus

1.Department of Advanced Technologies in Medicine and Dentistry,University G. d'Annunzio of Chieti-Pescara,Chieti,66100,Italy
2.Center for Advanced Studies and Technology-CAST,Chieti,66100,Italy
3.Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control,Collaborative Innovation Center of Atmospheric Environment and Equipment Technology,School of Environmental Science and Engineering,Nanjing University of Information Science and Technology,Nanjing,211544,China
4.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,5180551,China
5.School of Engineering and Applied Sciences,Harvard University,Cambridge,02138,United States
6.Department of Chemistry,University of California Irvine,Irvine,92697-2025,United States
7.Department of Chemistry,Colby College,Waterville,04901,United States
8.Department of Earth and Planetary Sciences,Harvard University,Cambridge,02138,United States

Aruffo，Eleonora,Wang，Junfeng,Ye，Jianhuai,et al. Partitioning of Organonitrates in the Production of Secondary Organic Aerosols from α-Pinene Photo-Oxidation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2021,56:5421-5429.

Aruffo，Eleonora.,Wang，Junfeng.,Ye，Jianhuai.,Ohno，Paul.,Qin，Yiming.,...&Martin，Scot T..(2021).Partitioning of Organonitrates in the Production of Secondary Organic Aerosols from α-Pinene Photo-Oxidation.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56,5421-5429.

Aruffo，Eleonora,et al."Partitioning of Organonitrates in the Production of Secondary Organic Aerosols from α-Pinene Photo-Oxidation".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56(2021):5421-5429.