1
|
Luo Z, Zang H, Li Z, Li C, Zhao Y. Species-specific effect of particle viscosity and particle-phase reactions on the formation of secondary organic aerosol. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175207. [PMID: 39097012 DOI: 10.1016/j.scitotenv.2024.175207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2024] [Revised: 07/30/2024] [Accepted: 07/31/2024] [Indexed: 08/05/2024]
Abstract
Secondary organic aerosol (SOA) is a major component of atmospheric fine particulate matter. Both particle viscosity and particle-phase chemistry play a crucial role in the formation and evolution of SOA; however, our understanding on how these two factors together with gas-phase chemistry collectively determine the formation of SOA is still limited. Here we developed a kinetic aerosol multilayer model coupled with gas-phase and particle-phase chemistry to simulate SOA formation. We take the atmospherically important α-pinene + OH oxidation system as an example application of the model. The simulations show that although the particle viscosity has negligible to small influences on the total SOA mass concentration, it strongly changes the concentration and distribution of individual compounds within the particle. This complicated effect of particle viscosity on SOA formation is a combined result of inhibited condensation or evaporation of specific organics due to slowed particle-phase diffusion. Furthermore, the particle-phase reactions alter the volatility and abundance of specific compounds and exacerbate their non-uniform distribution in highly viscous particles. Our results highlight an important species-specific effect of particle viscosity and particle-phase chemistry on SOA formation and demonstrate the capability of our model for quantifying such complicated effects on SOA formation and evolution.
Collapse
Affiliation(s)
- Zekun Luo
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Han Zang
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Ziyue Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex, Shanghai Academy of Environment Sciences, Shanghai 200233, China
| | - Chenxi Li
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| | - Yue Zhao
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
| |
Collapse
|
2
|
El Hajj O, Hartness SW, Vandergrift GW, Park Y, Glenn CK, Anosike A, Webb AR, Dewey NS, Doner AC, Cheng Z, Jatana GS, Moses-DeBusk M, China S, Rotavera B, Saleh R. Alkylperoxy radicals are responsible for the formation of oxygenated primary organic aerosol. SCIENCE ADVANCES 2023; 9:eadj2832. [PMID: 37976350 PMCID: PMC10656070 DOI: 10.1126/sciadv.adj2832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023]
Abstract
Organic aerosol (OA) is an air pollutant ubiquitous in urban atmospheres. Urban OA is usually apportioned into primary OA (POA), mostly emitted by mobile sources, and secondary OA (SOA), which forms in the atmosphere due to oxidation of gas-phase precursors from anthropogenic and biogenic sources. By performing coordinated measurements in the particle phase and the gas phase, we show that the alkylperoxy radical chemistry that is responsible for low-temperature ignition also leads to the formation of oxygenated POA (OxyPOA). OxyPOA is distinct from POA emitted during high-temperature ignition and is chemically similar to SOA. We present evidence for the prevalence of OxyPOA in emissions of a spark-ignition engine and a next-generation advanced compression-ignition engine, highlighting the importance of understanding OxyPOA for predicting urban air pollution patterns in current and future atmospheres.
Collapse
Affiliation(s)
- Omar El Hajj
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
| | - Samuel W. Hartness
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
| | | | - Yensil Park
- Energy and Transportation Science Division, Oak Ridge National Laboratory. Oak Ridge, TN 37831, USA
| | - Chase K. Glenn
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
| | - Anita Anosike
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
| | - Annabelle R. Webb
- Department of Chemistry, University of Georgia, Athens, GA 30602, USA
| | - Nicholas S. Dewey
- Department of Chemistry, University of Georgia, Athens, GA 30602, USA
| | - Anna C. Doner
- Department of Chemistry, University of Georgia, Athens, GA 30602, USA
| | - Zezhen Cheng
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Gurneesh S. Jatana
- Energy and Transportation Science Division, Oak Ridge National Laboratory. Oak Ridge, TN 37831, USA
| | - Melanie Moses-DeBusk
- Energy and Transportation Science Division, Oak Ridge National Laboratory. Oak Ridge, TN 37831, USA
| | - Swarup China
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - Brandon Rotavera
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, Athens, GA 30602, USA
| | - Rawad Saleh
- School of Environmental, Civil, Agricultural, and Mechanical Engineering, University of Georgia, Athens, GA 30602, USA
| |
Collapse
|
3
|
Zhang W, Zhao Z, Shen C, Zhang H. Unexpectedly Efficient Aging of Organic Aerosols Mediated by Autoxidation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:6965-6974. [PMID: 37083304 DOI: 10.1021/acs.est.2c09773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Multiphase oxidative aging is a ubiquitous process for atmospheric organic aerosols (OA). But its kinetics was often found to be slow in previous laboratory studies where high hydroxyl radical concentrations ([•OH]) were used. In this study, we performed heterogeneous oxidation experiments of several model OA systems under varied aging timescales and gas-phase [•OH]. Our results suggest that OA heterogeneous oxidation may be 2-3 orders of magnitude faster when [•OH] is decreased from typical laboratory flow tube conditions to atmospheric levels. Direct laboratory mass spectrometry measurements coupled with kinetic simulations suggest that an intermolecular autoxidation mechanism mediated by particle-phase peroxy radicals greatly accelerates OA oxidation, with enhanced formation of organic hydroperoxides, alcohols, and fragmentation products. With autoxidation, we estimate that the OA oxidation timescale in the atmosphere may be from less than a day to several days. Thus, OA oxidative aging can have greater atmospheric impacts than previously expected. Furthermore, our findings reveal the nature of heterogeneous aerosol oxidation chemistry in the atmosphere and help improve the understanding and prediction of atmospheric OA aging and composition evolution.
Collapse
Affiliation(s)
- Wen Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Zixu Zhao
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Chuanyang Shen
- Department of Chemistry, University of California, Riverside, California 92507, United States
| | - Haofei Zhang
- Department of Chemistry, University of California, Riverside, California 92507, United States
| |
Collapse
|
4
|
Bilsback KR, He Y, Cappa CD, Chang RYW, Croft B, Martin RV, Ng NL, Seinfeld JH, Pierce JR, Jathar SH. Vapors Are Lost to Walls, Not to Particles on the Wall: Artifact-Corrected Parameters from Chamber Experiments and Implications for Global Secondary Organic Aerosol. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:53-63. [PMID: 36563184 DOI: 10.1021/acs.est.2c03967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Atmospheric models of secondary organic aerosol (OA) (SOA) typically rely on parameters derived from environmental chambers. Chambers are subject to experimental artifacts, including losses of (1) particles to the walls (PWL), (2) vapors to the particles on the wall (V2PWL), and (3) vapors to the wall directly (VWL). We present a method for deriving artifact-corrected SOA parameters and translating these to volatility basis set (VBS) parameters for use in chemical transport models (CTMs). Our process involves combining a box model that accounts for chamber artifacts (Statistical Oxidation Model with a TwO-Moment Aerosol Sectional model (SOM-TOMAS)) with a pseudo-atmospheric simulation to develop VBS parameters that are fit across a range of OA mass concentrations. We found that VWL led to the highest percentage change in chamber SOA mass yields (high NOx: 36-680%; low NOx: 55-250%), followed by PWL (high NOx: 8-39%; low NOx: 10-37%), while the effects of V2PWL are negligible. In contrast to earlier work that assumed that V2PWL was a meaningful loss pathway, we show that V2PWL is an unimportant SOA loss pathway and can be ignored when analyzing chamber data. Using our updated VBS parameters, we found that not accounting for VWL may lead surface-level OA to be underestimated by 24% (0.25 μg m-3) as a global average or up to 130% (9.0 μg m-3) in regions of high biogenic or anthropogenic activity. Finally, we found that accurately accounting for PWL and VWL improves model-measurement agreement for fine mode aerosol mass concentrations (PM2.5) in the GEOS-Chem model.
Collapse
Affiliation(s)
- Kelsey R Bilsback
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado80523, United States
- PSE Healthy Energy, Oakland, California94612, United States
| | - Yicong He
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado80523, United States
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing100084, China
- State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing100084, China
| | - Christopher D Cappa
- Department of Civil and Environmental Engineering, University of California, Davis, California95616, United States
| | - Rachel Ying-Wen Chang
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova ScotiaB3H 4R2, Canada
| | - Betty Croft
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova ScotiaB3H 4R2, Canada
| | - Randall V Martin
- Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Nova ScotiaB3H 4R2, Canada
- Department of Energy, Environmental & Chemical Engineering, Washington University, St. Louis, Missouri63130, United States
| | - Nga Lee Ng
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia30332, United States
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia30332, United States
| | - John H Seinfeld
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California91125, United States
| | - Jeffrey R Pierce
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado80523, United States
| | - Shantanu H Jathar
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado80523, United States
| |
Collapse
|
5
|
Barquilla MDP, Mayes ML. Role of hydrogen bonding in bulk aqueous phase decomposition, complexation, and covalent hydration of pyruvic acid. Phys Chem Chem Phys 2022; 24:25151-25170. [DOI: 10.1039/d2cp03579k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The behavior of hydrogen bonding changes between the gas and aqueous phase, altering the mechanisms of various pyruvic acid processes and consequently affecting the aerosol formation in different environments.
Collapse
Affiliation(s)
- Michael Dave P. Barquilla
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, USA
| | - Maricris L. Mayes
- Department of Chemistry and Biochemistry, University of Massachusetts Dartmouth, North Dartmouth, MA 02747, USA
| |
Collapse
|