1
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Link MF, Li J, Ditto JC, Huynh H, Yu J, Zimmerman SM, Rediger KL, Shore A, Abbatt JPD, Garofalo LA, Farmer DK, Poppendieck D. Ventilation in a Residential Building Brings Outdoor NO x Indoors with Limited Implications for VOC Oxidation from NO 3 Radicals. Environ Sci Technol 2023; 57:16446-16455. [PMID: 37856830 DOI: 10.1021/acs.est.3c04816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Energy-efficient residential building standards require the use of mechanical ventilation systems that replace indoor air with outdoor air. Transient outdoor pollution events can be transported indoors via the mechanical ventilation system and other outdoor air entry pathways and impact indoor air chemistry. In the spring of 2022, we observed elevated levels of NOx (NO + NO2) that originated outdoors, entering the National Institute of Standards and Technology (NIST) Net-Zero Energy Residential Test Facility through the mechanical ventilation system. Using measurements of NOx, ozone (O3), and volatile organic compounds (VOCs), we modeled the effect of the outdoor-to-indoor ventilation of NOx pollution on the production of nitrate radical (NO3), a potentially important indoor oxidant. We evaluated how VOC oxidation chemistry was affected by NO3 during NOx pollution events compared to background conditions. We found that nitric oxide (NO) pollution introduced indoors titrated O3 and inhibited the modeled production of NO3. NO ventilated indoors also likely ceased most gas-phase VOC oxidation chemistry during plume events. Only through the artificial introduction of O3 to the ventilation duct during a NOx pollution event (i.e., when O3 and NO2 concentrations were high relative to typical conditions) were we able to measure NO3-initiated VOC oxidation products, indicating that NO3 was impacting VOC oxidation chemistry.
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Affiliation(s)
- Michael F Link
- National Institute of Standards and Technology, Gaithersburg 20899, Maryland, United States
| | - Jienan Li
- Colorado State University, Fort Collins 80523, Colorado, United States
| | - Jenna C Ditto
- University of Toronto, Toronto M5S 3H6, Ontario,Canada
| | - Han Huynh
- University of Toronto, Toronto M5S 3H6, Ontario,Canada
| | - Jie Yu
- University of Toronto, Toronto M5S 3H6, Ontario,Canada
| | - Stephen M Zimmerman
- National Institute of Standards and Technology, Gaithersburg 20899, Maryland, United States
| | - Katelyn L Rediger
- Colorado State University, Fort Collins 80523, Colorado, United States
| | - Andrew Shore
- National Institute of Standards and Technology, Gaithersburg 20899, Maryland, United States
| | | | - Lauren A Garofalo
- Colorado State University, Fort Collins 80523, Colorado, United States
| | - Delphine K Farmer
- Colorado State University, Fort Collins 80523, Colorado, United States
| | - Dustin Poppendieck
- National Institute of Standards and Technology, Gaithersburg 20899, Maryland, United States
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2
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Li J, Link MF, Pandit S, Webb MH, Mayer KJ, Garofalo LA, Rediger KL, Poppendieck DG, Zimmerman SM, Vance ME, Grassian VH, Morrison GC, Turpin BJ, Farmer DK. The persistence of smoke VOCs indoors: Partitioning, surface cleaning, and air cleaning in a smoke-contaminated house. Sci Adv 2023; 9:eadh8263. [PMID: 37831770 PMCID: PMC10575580 DOI: 10.1126/sciadv.adh8263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 09/12/2023] [Indexed: 10/15/2023]
Abstract
Wildfires are increasing in frequency, raising concerns that smoke can permeate indoor environments and expose people to chemical air contaminants. To study smoke transformations in indoor environments and evaluate mitigation strategies, we added smoke to a test house. Many volatile organic compounds (VOCs) persisted days following the smoke injection, providing a longer-term exposure pathway for humans. Two time scales control smoke VOC partitioning: a faster one (1.0 to 5.2 hours) that describes the time to reach equilibrium between adsorption and desorption processes and a slower one (4.8 to 21.2 hours) that describes the time for indoor ventilation to overtake adsorption-desorption equilibria in controlling the air concentration. These rates imply that vapor pressure controls partitioning behavior and that house ventilation plays a minor role in removing smoke VOCs. However, surface cleaning activities (vacuuming, mopping, and dusting) physically removed surface reservoirs and thus reduced indoor smoke VOC concentrations more effectively than portable air cleaners and more persistently than window opening.
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Affiliation(s)
- Jienan Li
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Michael F. Link
- National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
| | - Shubhrangshu Pandit
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093, USA
| | - Marc H. Webb
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kathryn J. Mayer
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Lauren A. Garofalo
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | - Katelyn L. Rediger
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
| | | | | | - Marina E. Vance
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Vicki H. Grassian
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093, USA
| | - Glenn C. Morrison
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Barbara J. Turpin
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Delphine K. Farmer
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA
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3
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O'Dell K, Hornbrook RS, Permar W, Levin EJT, Garofalo LA, Apel EC, Blake NJ, Jarnot A, Pothier MA, Farmer DK, Hu L, Campos T, Ford B, Pierce JR, Fischer EV. Correction to Hazardous Air Pollutants in Fresh and Aged Western US Wildfire Smoke and Implications for Long-Term Exposure. Environ Sci Technol 2022; 56:3304. [PMID: 35175737 DOI: 10.1021/acs.est.2c01008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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4
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Sauer JS, Mayer KJ, Lee C, Alves MR, Amiri S, Bahaveolos CJ, Franklin EB, Crocker DR, Dang D, Dinasquet J, Garofalo LA, Kaluarachchi CP, Kilgour DB, Mael LE, Mitts BA, Moon DR, Moore AN, Morris CK, Mullenmeister CA, Ni CM, Pendergraft MA, Petras D, Simpson RMC, Smith S, Tumminello PR, Walker JL, DeMott PJ, Farmer DK, Goldstein AH, Grassian VH, Jaffe JS, Malfatti F, Martz TR, Slade JH, Tivanski AV, Bertram TH, Cappa CD, Prather KA. The Sea Spray Chemistry and Particle Evolution study (SeaSCAPE): overview and experimental methods. Environ Sci Process Impacts 2022; 24:290-315. [PMID: 35048927 DOI: 10.1039/d1em00260k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Marine aerosols strongly influence climate through their interactions with solar radiation and clouds. However, significant questions remain regarding the influences of biological activity and seawater chemistry on the flux, chemical composition, and climate-relevant properties of marine aerosols and gases. Wave channels, a traditional tool of physical oceanography, have been adapted for large-scale ocean-atmosphere mesocosm experiments in the laboratory. These experiments enable the study of aerosols under controlled conditions which isolate the marine system from atmospheric anthropogenic and terrestrial influences. Here, we present an overview of the 2019 Sea Spray Chemistry and Particle Evolution (SeaSCAPE) study, which was conducted in an 11 800 L wave channel which was modified to facilitate atmospheric measurements. The SeaSCAPE campaign sought to determine the influence of biological activity in seawater on the production of primary sea spray aerosols, volatile organic compounds (VOCs), and secondary marine aerosols. Notably, the SeaSCAPE experiment also focused on understanding how photooxidative aging processes transform the composition of marine aerosols. In addition to a broad range of aerosol, gas, and seawater measurements, we present key results which highlight the experimental capabilities during the campaign, including the phytoplankton bloom dynamics, VOC production, and the effects of photochemical aging on aerosol production, morphology, and chemical composition. Additionally, we discuss the modifications made to the wave channel to improve aerosol production and reduce background contamination, as well as subsequent characterization experiments. The SeaSCAPE experiment provides unique insight into the connections between marine biology, atmospheric chemistry, and climate-relevant aerosol properties, and demonstrates how an ocean-atmosphere-interaction facility can be used to isolate and study reactions in the marine atmosphere in the laboratory under more controlled conditions.
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Affiliation(s)
- Jon S Sauer
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Kathryn J Mayer
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Christopher Lee
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Michael R Alves
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Sarah Amiri
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
- Marine Science Institute, University of California, Santa Barbara, Santa Barbara, California 93106, USA
| | | | - Emily B Franklin
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, USA
| | - Daniel R Crocker
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Duyen Dang
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Julie Dinasquet
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Lauren A Garofalo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | | | - Delaney B Kilgour
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Liora E Mael
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Brock A Mitts
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Daniel R Moon
- Department of Civil and Environmental Engineering, University of California, Davis, California 95616, USA
- Institute for Chemical Science, Heriot-Watt University, Edinburgh EH14 4AS, UK
| | - Alexia N Moore
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Clare K Morris
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Catherine A Mullenmeister
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Chi-Min Ni
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Matthew A Pendergraft
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Daniel Petras
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
- Skaggs School of Pharmacy and Pharmaceutical Science, University of California, San Diego, La Jolla, California 92093, USA
| | - Rebecca M C Simpson
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Stephanie Smith
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Paul R Tumminello
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Joseph L Walker
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Paul J DeMott
- Department of Atmospheric Sciences, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, USA
| | - Allen H Goldstein
- Department of Civil and Environmental Engineering, University of California, Berkeley, California 94720, USA
- Department of Environmental Science, Policy and Management, University of California, Berkeley, California 94720, USA
| | - Vicki H Grassian
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
- Department of Nanoengineering, University of California San Diego, La Jolla, California 92093, USA
| | - Jules S Jaffe
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Francesca Malfatti
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
- Universita' degli Studi di Trieste, Department of Life Sciences, Trieste, 34127, Italy
| | - Todd R Martz
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
| | - Jonathan H Slade
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
| | - Alexei V Tivanski
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, USA
| | - Timothy H Bertram
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53706, USA
| | - Christopher D Cappa
- Department of Civil and Environmental Engineering, University of California, Davis, California 95616, USA
| | - Kimberly A Prather
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, USA.
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, USA
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5
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Garofalo LA, He Y, Jathar SH, Pierce JR, Fredrickson CD, Palm BB, Thornton JA, Mahrt F, Crescenzo GV, Bertram AK, Draper DC, Fry JL, Orlando J, Zhang X, Farmer DK. Heterogeneous Nucleation Drives Particle Size Segregation in Sequential Ozone and Nitrate Radical Oxidation of Catechol. Environ Sci Technol 2021; 55:15637-15645. [PMID: 34813317 DOI: 10.1021/acs.est.1c02984] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Secondary organic aerosol formation via condensation of organic vapors onto existing aerosol transforms the chemical composition and size distribution of ambient aerosol, with implications for air quality and Earth's radiative balance. Gas-to-particle conversion is generally thought to occur on a continuum between equilibrium-driven partitioning of semivolatile molecules to the pre-existing mass size distribution and kinetic-driven condensation of low volatility molecules to the pre-existing surface area size distribution. However, we offer experimental evidence in contrast to this framework. When catechol is sequentially oxidized by O3 and NO3 in the presence of (NH4)2SO4 seed particles with a single size mode, we observe a bimodal organic aerosol mass size distribution with two size modes of distinct chemical composition with nitrocatechol from NO3 oxidation preferentially condensing onto the large end of the pre-existing size distribution (∼750 nm). A size-resolved chemistry and microphysics model reproduces the evolution of the two distinct organic aerosol size modes─heterogeneous nucleation to an independent, nitrocatechol-rich aerosol phase.
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Affiliation(s)
- Lauren A Garofalo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Yicong He
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Shantanu H Jathar
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey R Pierce
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Carley D Fredrickson
- Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Brett B Palm
- Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Joel A Thornton
- Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Fabian Mahrt
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
- Laboratory of Environmental Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Giuseppe V Crescenzo
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Allan K Bertram
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Danielle C Draper
- Department of Chemistry, Reed College, Portland, Oregon 97202, United States
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, United States
| | - Juliane L Fry
- Department of Chemistry, Reed College, Portland, Oregon 97202, United States
| | - John Orlando
- National Center for Atmospheric Research, Boulder, Colorado 80307, United States
| | - Xuan Zhang
- National Center for Atmospheric Research, Boulder, Colorado 80307, United States
- Department of Life and Environmental Sciences, University of California, Merced, California 95343, United States
| | - Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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6
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He Y, Akherati A, Nah T, Ng NL, Garofalo LA, Farmer DK, Shiraiwa M, Zaveri RA, Cappa CD, Pierce JR, Jathar SH. Particle Size Distribution Dynamics Can Help Constrain the Phase State of Secondary Organic Aerosol. Environ Sci Technol 2021; 55:1466-1476. [PMID: 33417446 DOI: 10.1021/acs.est.0c05796] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Particle phase state is a property of atmospheric aerosols that has important implications for the formation, evolution, and gas/particle partitioning of secondary organic aerosol (SOA). In this work, we use a size-resolved chemistry and microphysics model (Statistical Oxidation Model coupled to the TwO Moment Aerosol Sectional (SOM-TOMAS)), updated to include an explicit treatment of particle phase state, to constrain the bulk diffusion coefficient (Db) of SOA produced from α-pinene ozonolysis. By leveraging data from laboratory experiments performed in the absence of a seed and under dry conditions, we find that the Db for SOA can be constrained ((1-7) × 10-15 cm2 s-1 in these experiments) by simultaneously reproducing the time-varying SOA mass concentrations and the evolution of the particle size distribution. Another version of our model that used the predicted SOA composition to calculate the glass-transition temperature, viscosity, and, ultimately, Db (∼10-15 cm2 s-1) of the SOA was able to reproduce the mass and size distribution measurements when we included oligomer formation (oligomers accounted for about a fifth of the SOA mass). Our work highlights the potential of a size-resolved SOA model to constrain the particle phase state of SOA using historical measurements of the evolution of the particle size distribution.
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Affiliation(s)
- Yicong He
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ali Akherati
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Theodora Nah
- School of Energy and Environment, City University of Hong Kong, Hong Kong, China
- State Key Laboratory of Marine Pollution, City University of Hong Kong, Hong Kong, China
| | - Nga L Ng
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Lauren A Garofalo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Manabu Shiraiwa
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Rahul A Zaveri
- Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Christopher D Cappa
- Department of Civil and Environmental Engineering, University of California Davis, Davis, California 95616, United States
| | - Jeffrey R Pierce
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Shantanu H Jathar
- Department of Mechanical Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
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7
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O'Dell K, Hornbrook RS, Permar W, Levin EJT, Garofalo LA, Apel EC, Blake NJ, Jarnot A, Pothier MA, Farmer DK, Hu L, Campos T, Ford B, Pierce JR, Fischer EV. Hazardous Air Pollutants in Fresh and Aged Western US Wildfire Smoke and Implications for Long-Term Exposure. Environ Sci Technol 2020; 54:11838-11847. [PMID: 32857515 DOI: 10.1021/acs.est.0c04497] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Wildfires have a significant adverse impact on air quality in the United States (US). To understand the potential health impacts of wildfire smoke, many epidemiology studies rely on concentrations of fine particulate matter (PM) as a smoke tracer. However, there are many gas-phase hazardous air pollutants (HAPs) identified by the Environmental Protection Agency (EPA) that are also present in wildfire smoke plumes. Using observations from the Western Wildfire Experiment for Cloud Chemistry, Aerosol Absorption, and Nitrogen (WE-CAN), a 2018 aircraft-based field campaign that measured HAPs and PM in western US wildfire smoke plumes, we identify the relationships between HAPs and associated health risks, PM, and smoke age. We find the ratios between acute, chronic noncancer, and chronic cancer HAPs health risk and PM in smoke decrease as a function of smoke age by up to 72% from fresh (<1 day of aging) to old (>3 days of aging) smoke. We show that acrolein, formaldehyde, benzene, and hydrogen cyanide are the dominant contributors to gas-phase HAPs risk in smoke plumes. Finally, we use ratios of HAPs to PM along with annual average smoke-specific PM to estimate current and potential future smoke HAPs risks.
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Affiliation(s)
- Katelyn O'Dell
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States
| | - Rebecca S Hornbrook
- Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, Colorado 80301, United States
| | - Wade Permar
- Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59812, United States
| | - Ezra J T Levin
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States
| | - Lauren A Garofalo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Eric C Apel
- Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, Colorado 80301, United States
| | - Nicola J Blake
- Department of Chemistry, University of California, Irvine, California 92697, United States
| | - Alex Jarnot
- Department of Chemistry, University of California, Irvine, California 92697, United States
| | - Matson A Pothier
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Delphine K Farmer
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Lu Hu
- Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59812, United States
| | - Teresa Campos
- Atmospheric Chemistry Division, National Center for Atmospheric Research, Boulder, Colorado 80301, United States
| | - Bonne Ford
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States
| | - Jeffrey R Pierce
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States
| | - Emily V Fischer
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80521, United States
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8
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Garofalo LA, Smith MC, Dagdigian PJ, Kłos J, Alexander MH, Boering KA, Lin JJM. Electronic quenching of O((1)D) by Xe: Oscillations in the product angular distribution and their dependence on collision energy. J Chem Phys 2015; 143:054307. [PMID: 26254653 DOI: 10.1063/1.4927705] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The dynamics of the O((1)D) + Xe electronic quenching reaction was investigated in a crossed beam experiment at four collision energies. Marked large-scale oscillations in the differential cross sections were observed for the inelastic scattering products, O((3)P) and Xe. The shape and relative phases of the oscillatory structure depend strongly on collision energy. Comparison of the experimental results with time-independent scattering calculations shows qualitatively that this behavior is caused by Stueckelberg interferences, for which the quantum phases of the multiple reaction pathways accessible during electronic quenching constructively and destructively interfere.
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Affiliation(s)
- Lauren A Garofalo
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Mica C Smith
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Paul J Dagdigian
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218-2685, USA
| | - Jacek Kłos
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Millard H Alexander
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742-2021, USA
| | - Kristie A Boering
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Jim Jr-Min Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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9
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Perez-Delgado Y, Barroso JZ, Garofalo LA, Manzanares CE. Vibrational Overtone Spectroscopy, Energy Levels, and Intensities of (CH3)3C—C≡C—H. J Phys Chem A 2012; 116:2071-9. [DOI: 10.1021/jp208225g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasnahir Perez-Delgado
- Department
of Chemistry and Biochemistry, Baylor University, 101 Bagby Avenue,
Baylor Sciences Building E-216, Waco, Texas 76706, United States
| | - Jenny Z. Barroso
- Department
of Chemistry and Biochemistry, Baylor University, 101 Bagby Avenue,
Baylor Sciences Building E-216, Waco, Texas 76706, United States
| | - Lauren A. Garofalo
- Department
of Chemistry and Biochemistry, Baylor University, 101 Bagby Avenue,
Baylor Sciences Building E-216, Waco, Texas 76706, United States
| | - Carlos E. Manzanares
- Department
of Chemistry and Biochemistry, Baylor University, 101 Bagby Avenue,
Baylor Sciences Building E-216, Waco, Texas 76706, United States
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