This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1021/acs.est.6b00961 in citations.
Organic Nitrate Contribution to New Particle Formation and Growth in Secondary Organic Aerosols from α-Pinene Ozonolysis
Organic Nitrate Contribution to New Particle Formation and Growth in Secondary Organic Aerosols from α-Pinene Ozonolysis
The chemical kinetics of organic nitrate production during new particle formation and growth of secondary organic aerosols (SOA) were investigated using the short-lived radioactive tracer 13N in flow-reactor studies of α-pinene oxidation with ozone. Direct and quantitative measurements of the nitrog...
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Personal Name(s): | Berkemeier, Thomas |
---|---|
Ammann, Markus / Mentel, Thomas F. / Pöschl, Ulrich / Shiraiwa, Manabu (Corresponding author) | |
Contributing Institute: |
Troposphäre; IEK-8 |
Published in: | Environmental science & technology, 50 (2016) 12, S. 6334 - 6342 |
Imprint: |
Columbus, Ohio
American Chemical Society
2016
|
PubMed ID: |
27219077 |
DOI: |
10.1021/acs.est.6b00961 |
Document Type: |
Journal Article |
Research Program: |
Tropospheric trace substances and their transformation processes |
Publikationsportal JuSER |
The chemical kinetics of organic nitrate production during new particle formation and growth of secondary organic aerosols (SOA) were investigated using the short-lived radioactive tracer 13N in flow-reactor studies of α-pinene oxidation with ozone. Direct and quantitative measurements of the nitrogen content indicate that organic nitrates accounted for ∼40% of SOA mass during initial particle formation, decreasing to ∼15% upon particle growth to the accumulation-mode size range (>100 nm). Experiments with OH scavengers and kinetic model results suggest that organic peroxy radicals formed by α-pinene reacting with secondary OH from ozonolysis are key intermediates in the organic nitrate formation process. The direct reaction of α-pinene with NO3 was found to be less important for particle-phase organic nitrate formation. The nitrogen content of SOA particles decreased slightly upon increase of relative humidity up to 80%. The experiments show a tight correlation between organic nitrate content and SOA particle-number concentrations, implying that the condensing organic nitrates are among the extremely low volatility organic compounds (ELVOC) that may play an important role in the nucleation and growth of atmospheric nanoparticles. |