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New Particle Formation and Growth Dynamics for α-Pinene Ozonolysis in a Smog Chamber and Implications for Ambient Environments

Journal Article · · ACS Earth and Space Chemistry
 [1];  [2];  [3];  [4];  [5];  [6];  [1]
  1. National Taiwan University, Taipei (Taiwan)
  2. Harvard University, Cambridge, MA (United States); Southern University of Science and Technology (SUSTech), Shenzhen (China)
  3. Harvard University, Cambridge, MA (United States); Chinese Academy of Sciences (CAS), Xi'an (China)
  4. Southern University of Science and Technology (SUSTech), Shenzhen (China)
  5. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
  6. Harvard University, Cambridge, MA (United States)
+ Show Author Affiliations
Secondary organic aerosol (SOA) plays an important role in the Earth’s energy balance and air quality. Understanding the formation of SOA accompanying the oxidation of volatile organic compounds (VOCs) remains incomplete because of the complex reactions and partitioning mechanisms. In this study, we investigated new particle formation (NPF) of SOA derived from α-pinene ozonolysis in the Harvard Environmental Chamber using the Model for Simulating Aerosol Interactions and Chemistry (MOSAIC) with the condensing species as two products, one of lower volatility (LVOC, 0.01 μg m–3) and one of higher volatility (SVOC, 1.0 μg m–3). A module for the classical nucleation theory was included. The surface tension (σ), bulk diffusivity (Db), and mass accommodation coefficient (α) were varied until convergence between the simulated and observed particle number size distributions. α of LVOC was constrained as 0.03–0.1 with the reported σ of α-pinene-ozonolysis-derived SOA and Tolman surface correction (~23.0–27.5 mN m–1) and Db from 10–15.5 to >10–11 cm2 s–1. The observed particle number size distribution of α-pinene ozonolysis was well-simulated to derive the physical parameters, including σ, Db, and α, suggesting the possible application to group the reported complex oxidation products and further application for other atmospheric-related oxidations for quantifying NPF.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830; AC06-76RL01830
OSTI ID:
1902886
Alternate ID(s):
OSTI ID: 1903716
Report Number(s):
PNNL-SA-179840
Journal Information:
ACS Earth and Space Chemistry, Journal Name: ACS Earth and Space Chemistry Journal Issue: 12 Vol. 6; ISSN 2472-3452
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

54 ENVIRONMENTAL SCIENCES
bulk diffusivity
new particle formation
nucleation
ozonolysis
α-pinene