Grantee Research Project Results
2015 Progress Report: The role of nitrate radicals (NO3) in aerosol life cycle: Secondary organic aerosol formation and aging of atmospheric organic aerosols
EPA Grant Number: R835403Title: The role of nitrate radicals (NO3) in aerosol life cycle: Secondary organic aerosol formation and aging of atmospheric organic aerosols
Investigators: Ng, Nga Lee
Institution: Georgia Institute of Technology
EPA Project Officer: Chung, Serena
Project Period: April 1, 2013 through March 31, 2016 (Extended to March 31, 2017)
Project Period Covered by this Report: April 1, 2015 through March 31,2016
Project Amount: $300,000
RFA: Anthropogenic Influences on Organic Aerosol Formation and Regional Climate Implications (2012) RFA Text | Recipients Lists
Research Category: Air Quality and Air Toxics , Climate Change , Air , Early Career Awards
Objective:
The goal of this project is to experimentally determine the extent to which NO3 radicals (formed from anthropogenic NO2 and ozone) affect organic aerosol (OA) loading and composition over its atmospheric lifetime, taking into account secondary organic aerosol (SOA) formation from NO3 oxidation pathway and both daytime and nighttime aging processes.
Progress Summary:
Work proceeded well during this year. We performed extensive laboratory chamber experiments to investigate the effects of photochemical aging, dilution, and temperature change on secondary organic aerosol (SOA) and organic nitrates formed from BVOC+NO3. Experiments were conducted under dry vs. humid conditions with ammonium sulfate seed. The SOA yields for specific monoterpenes were also determined at 25 oC and 40 oC. We also performed systematic chamber experiments to evaluate the effects of particle and vapor wall loss on SOA formation and yields. Notable results are:
- Investigation of photochemical aging of SOA formed from nitrate radical oxidation of a-pinene and b-pinene.
- Understanding the effects of dilution and temperature on SOA and organic nitrates formed from nitrate radical oxidation of monoterpenes.
- Determination of the influence of seed aerosol surface area and oxidation rate on vapor-wall deposition and SOA yields in chamber experiments.
- Evaluation of the role of aerosol water and phase separation for organic aerosols in the southeastern US using CMAQ.
Future Activities:
We will focus on finishing up data analysis and manuscripts for publication.
Journal Articles on this Report : 12 Displayed | Download in RIS Format
| Other project views: | All 47 publications | 21 publications in selected types | All 20 journal articles |
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Boyd CM, Sanchez J, Xu L, Eugene AJ, Nah T, Tuet WY, Guzman MI, Ng NL. Secondary organic aerosol formation from the β-pinene+NO3 system: effect of humidity and peroxy radical fate. Atmospheric Chemistry and Physics 2015;15(13):7497-7522. |
R835403 (2014) R835403 (2015) R835403 (Final) R834799 (Final) |
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Boyd CM, Nah T, Xu L, Berkemeier T, Ng NL. Secondary organic aerosol (SOA) from nitrate radical oxidation of monoterpenes: effects of temperature, dilution, and humidity on aerosol formation, mixing, and evaporation. Environmental Science & Technology 2017;51(14):7831-7841. |
R835403 (2015) R835403 (Final) |
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Lee BH, Mohr C, Lopez-Hilfiker FD, Lutz A, Hallquist M, Lee L, Romer P, Cohen RC, Iyer S, Kurten T, Hu W, Day DA, Campuzano-Jost P, Jimenez JL, Xu L, Ng NL, Guo H, Weber RJ, Wild RJ, Brown SS, Koss A, de Gouw J, Olson K, Goldstein AH, Seco R, Kim S, McAvey K, Shepson PB, Starn T, Baumann K, Edgerton ES, Liu J, Shilling JE, Miller DO, Brune W, Schobesberger S, D'Ambro EL, Thornton JA. Highly functionalized organic nitrates in the southeast United States:contribution to secondary organic aerosol and reactive nitrogen budgets. Proceedings of the National Academy of Sciences of the United States of America 2016;113(6):1516-1521. |
R835403 (2015) R835403 (Final) R835400 (2014) R835400 (Final) R835407 (Final) R835410 (2013) |
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Nah T, Sanchez J, Boyd CM, Ng NL. Photochemical aging of α-pinene and β-pinene secondary organic aerosol formed from nitrate radical oxidation. Environmental Science & Technology 2016;50(1):222-231. |
R835403 (2015) R835403 (Final) |
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Nah T, McVay RC, Zhang X, Boyd CM, Seinfeld JH, Ng NL. Influence of seed aerosol surface area and oxidation rate on vapor wall deposition and SOA mass yields: a case study with α-pinene ozonolysis. Atmospheric Chemistry and Physics 2016;16(14):9361-9379. |
R835403 (2015) R835403 (Final) |
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Nah T, McVay RC, Pierce JR, Seinfeld JH, Ng NL. Constraining uncertainties in particle-wall deposition correction during SOA formation in chamber experiments. Atmospheric Chemistry and Physics 2017;17(3):2297-2310. |
R835403 (2015) R835403 (Final) |
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Ng NL, Brown SS, Archibald AT, Atlas E, Cohen RC, Crowley JN, Day DA, Donahue NM, Fry JL, Fuchs H, Griffin RJ, Guzman MI, Herrmann H, Hodzic A, Iinuma Y, Jimenez JL, Kiendler-Scharr A, Lee BH, Luecken DJ, Mao J, McLaren R, Mutzel A, Osthoff HD, Ouyang B, Picquet-Varrault B, Platt U, Pye HOT, Rudich Y, Schwantes RH, Shiraiwa M, Stutz J, Thornton JA, Tilgner A, Williams BJ, Zaveri RA. Nitrate radicals and biogenic volatile organic compounds: oxidation, mechanisms, and organic aerosol. Atmospheric Chemistry and Physics 2017;17(3):2103-2162. |
R835403 (2015) R835403 (Final) R835877 (2016) R835877 (2017) R835877 (2018) R835877 (2019) |
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Pye HOT, Luecken DJ, Xu L, Boyd CM, Ng NL, Baker KR, Ayres BR, Bash JO, Baumann K, Carter WPL, Edgerton E, Fry JL, Hutzell WT, Schwede DB, Shepson PB. Modeling the current and future roles of particulate organic nitrates in the Southeastern United States. Environmental Science & Technology 2015;49(24):14195-14203. |
R835403 (2014) R835403 (2015) R835403 (Final) R835399 (Final) R835409 (Final) R835410 (2013) |
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Pye HOT, Murphy BN, Xu L, Ng NL, Carlton AG, Guo H, Weber R, Vasilakos P, Appel KW, Budisulistiorini SH, Surratt JD, Nenes A, Hu W, Jimenez JL, Isaacman-VanWertz G, Misztal PK, Goldstein AH. On the implications of aerosol liquid water and phase separation for organic aerosol mass. Atmospheric Chemistry & Physics 2017;17(1):343-369. |
R835403 (2015) R835403 (Final) R835404 (2015) R835404 (Final) R835407 (Final) R835410 (Final) R835412 (Final) R835877 (2016) R835877 (2017) R835877 (2018) R835877 (2019) |
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Saha PK, Khlystov A, Yahya K, Zhang Y, Xu L, Ng NL, Grieshop AP. Quantifying the volatility of organic aerosol in the southeastern US. Atmospheric Chemistry and Physics 2017;17(1):501-520. |
R835403 (2015) R835403 (Final) R835411 (2014) R835411 (2015) R835411 (2016) R835411 (Final) |
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Xu L, Guo H, Boyd CM, Klein M, Bougiatioti A, Cerully KM, Hite JR, Isaacman-VanWertz G, Kreisberg NM, Knote C, Olson K, Koss A, Goldstein AH, Hering SV, de Gouw JA, Baumann K, Lee S-H, Nenes A, Weber RJ, Ng NL. Effects of anthropogenic emissions on aerosol formation from isoprene and monoterpenes in the southeastern United States. Proceedings of the National Academy of Sciences of the United States of America 2015;112(1):37-42. |
R835403 (2014) R835403 (2015) R835403 (Final) R834799 (2015) R834799 (2016) R834799 (Final) R834799C001 (2015) R834799C001 (Final) R835410 (2013) R835410 (2014) R835410 (2015) R835410 (Final) |
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Xu L, Guo H, Weber RJ, Ng NL. Chemical characterization of water-soluble organic aerosol in contrasting rural and urban environments in the Southeastern United States. Environmental Science & Technology 2017;51(1):78-88. |
R835403 (2015) R835403 (Final) |
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Supplemental Keywords:
organic nitrates, partitioning, semivolatiles, multifunctional oxidation productsRelevant Websites:
Ng Research Group | Georgia Tech School of Chemical and Biomolecular Engineering Exit
Nitrate Radicals and Biogenic Volatile Organic Compounds (VOCs) Workshop | Georgia Tech Exit
Special Symposia | American Association for Aerosol Research 25th Annual Conference: October 17-21, 2016 Exit
Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.