Articles | Volume 22, issue 20
https://doi.org/10.5194/acp-22-13783-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-22-13783-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
ACP Letters
| Highlight paper
| 
01 Nov 2022
ACP Letters | Highlight paper |
| 01 Nov 2022
| 01 Nov 2022
Not all types of secondary organic aerosol mix: two phases observed when mixing different secondary organic aerosol types
Fabian Mahrt
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
Laboratory of Environmental Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
Long Peng
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
Institute for Environmental and Climate Research, Jinan University,
Guangzhou 511443, China
now at: College of Ecology and Environment, Xinjiang University, Urumqi 830017, China
Julia Zaks
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
Yuanzhou Huang
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
now at: Anton Paar Canada Inc., 4920 Place Olivia, H4R 2Z8 Saint
Laurent, Canada
Paul E. Ohno
John A. Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Center for the Environment, Harvard University, Cambridge, MA 02138, USA
now at: Department of Chemistry and Biochemistry, Auburn
University, Auburn, AL 36849, USA
Natalie R. Smith
Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
Florence K. A. Gregson
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
Yiming Qin
John A. Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
now at: Department of Chemistry, University of California,
Irvine, CA 92697-2025, USA
Celia L. Faiola
Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA 92697, USA
Scot T. Martin
John A. Paulson School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA 02138, USA
Department of Earth and Planetary Sciences, Harvard University,
Cambridge, MA 02138, USA
Sergey A. Nizkorodov
Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
Markus Ammann
Laboratory of Environmental Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
Department of Chemistry, University of British Columbia, 2036 Main
Mall, Vancouver, BC, V6T1Z1 Canada
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Cited
14 citations as recorded by crossref.
- Effects of volatility, viscosity, and non-ideality on particle–particle mixing timescales of secondary organic aerosols M. Schervish et al. 10.1080/02786826.2023.2256827
- Phase Transitions in Organic and Organic/Inorganic Aerosol Particles M. Freedman et al. 10.1146/annurev-physchem-083122-115909
- Predicting liquid–liquid phase separation in ternary organic–organic–water mixtures N. Hyttinen 10.1039/D3CP00691C
- Viscosity, Glass Formation, and Mixing Times within Secondary Organic Aerosol from Biomass Burning Phenolics K. Kiland et al. 10.1021/acsearthspacechem.3c00039
- CAMx–UNIPAR simulation of secondary organic aerosol mass formed from multiphase reactions of hydrocarbons under the Central Valley urban atmospheres of California Y. Jo et al. 10.5194/acp-24-487-2024
- Acoustic levitation with polarising optical microscopy (AL-POM): water uptake in a nanostructured atmospheric aerosol proxy A. Milsom et al. 10.1039/D3EA00083D
- Gas–particle partitioning of semivolatile organic compounds when wildfire smoke comes to town Y. Liang et al. 10.5194/acp-23-12441-2023
- One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou, China L. Mao et al. 10.1007/s11783-024-1824-3
- Modeling the molecular composition of secondary organic aerosol under highly polluted conditions: A case study in the Yangtze River Delta Region in China Q. Huang et al. 10.1016/j.scitotenv.2024.173327
- Accounting for Cloud Nucleation Activation Mechanism of Secondary Organic Matter from α-Pinene Oxidation Using Experimentally Retrieved Water Solubility Distributions W. Lee et al. 10.1021/acs.est.3c03039
- Existence of Crystalline Ammonium Sulfate Nuclei Affects Chemical Reactivity of Oleic Acid Particles Through Heterogeneous Nucleation W. Liu et al. 10.1029/2023JD038675
- Influence of ozone pollution on the mixing state and formation of oxygenated organics containing single particles S. Liu et al. 10.1016/j.scitotenv.2024.171880
- Characterizing water solubility of fresh and aged secondary organic aerosol in PM2.5 with the stable carbon isotope technique F. Wei et al. 10.5194/acp-24-8507-2024
- Phase Behavior and Viscosity in Biomass Burning Organic Aerosol and Climatic Impacts F. Gregson et al. 10.1021/acs.est.3c03231
14 citations as recorded by crossref.
- Effects of volatility, viscosity, and non-ideality on particle–particle mixing timescales of secondary organic aerosols M. Schervish et al. 10.1080/02786826.2023.2256827
- Phase Transitions in Organic and Organic/Inorganic Aerosol Particles M. Freedman et al. 10.1146/annurev-physchem-083122-115909
- Predicting liquid–liquid phase separation in ternary organic–organic–water mixtures N. Hyttinen 10.1039/D3CP00691C
- Viscosity, Glass Formation, and Mixing Times within Secondary Organic Aerosol from Biomass Burning Phenolics K. Kiland et al. 10.1021/acsearthspacechem.3c00039
- CAMx–UNIPAR simulation of secondary organic aerosol mass formed from multiphase reactions of hydrocarbons under the Central Valley urban atmospheres of California Y. Jo et al. 10.5194/acp-24-487-2024
- Acoustic levitation with polarising optical microscopy (AL-POM): water uptake in a nanostructured atmospheric aerosol proxy A. Milsom et al. 10.1039/D3EA00083D
- Gas–particle partitioning of semivolatile organic compounds when wildfire smoke comes to town Y. Liang et al. 10.5194/acp-23-12441-2023
- One-year observation of the mixing states of oxygenated organics-containing single particles in Guangzhou, China L. Mao et al. 10.1007/s11783-024-1824-3
- Modeling the molecular composition of secondary organic aerosol under highly polluted conditions: A case study in the Yangtze River Delta Region in China Q. Huang et al. 10.1016/j.scitotenv.2024.173327
- Accounting for Cloud Nucleation Activation Mechanism of Secondary Organic Matter from α-Pinene Oxidation Using Experimentally Retrieved Water Solubility Distributions W. Lee et al. 10.1021/acs.est.3c03039
- Existence of Crystalline Ammonium Sulfate Nuclei Affects Chemical Reactivity of Oleic Acid Particles Through Heterogeneous Nucleation W. Liu et al. 10.1029/2023JD038675
- Influence of ozone pollution on the mixing state and formation of oxygenated organics containing single particles S. Liu et al. 10.1016/j.scitotenv.2024.171880
- Characterizing water solubility of fresh and aged secondary organic aerosol in PM2.5 with the stable carbon isotope technique F. Wei et al. 10.5194/acp-24-8507-2024
- Phase Behavior and Viscosity in Biomass Burning Organic Aerosol and Climatic Impacts F. Gregson et al. 10.1021/acs.est.3c03231
Latest update: 21 Nov 2024
Executive editor
Organic aerosol remain one of the more complex and hard to predict when studying atmospheric aerosols and their influences on air quality, meteorology and climate. Among its many complexities is the phase and viscosity of the organic matter, which dictates how it interacts with other particulate components and the gas phase, in turn affecting growth rates and cloud activation. There have been a number of previous works studying phase separation, where the organic matter becomes immiscible with an aqueous component (containing inorganic salts), but this new letter presents compelling visual evidence that different organic phases are also capable of separation. Different secondary organic aerosol (SOA) mixtures were created and some mixtures exhibited separation, with a factor being the oxygen-to-carbon ratio of the material, likely a surrogate for polarity. If this behaviour is found to be important in atmospheric aerosols this represents a new direction in how these may need to be represented in models.
Organic aerosol remain one of the more complex and hard to predict when studying atmospheric...
Short summary
The number of condensed phases in mixtures of different secondary organic aerosol (SOA) types determines their impact on air quality and climate. Here we observe the number of phases in individual particles that contain mixtures of two different types of SOA. We find that SOA mixtures can form one- or two-phase particles, depending on the difference in the average oxygen-to-carbon (O / C) ratios of the two SOA types that are internally mixed within individual particles.
The number of condensed phases in mixtures of different secondary organic aerosol (SOA) types...
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