Study of formation and aging processes of biogenic secondary organic aerosol using real-time analysis method
| Project/Area Number |
17H01866
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
Sato Kei 国立研究開発法人国立環境研究所, 地域環境研究センター, 室長 (10282815)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Keywords | 大気汚染 / 微小粒子状物質 / 揮発性有機化合物 / 光化学オキシダント / 二次有機エアロゾル / スモッグチャンバー / 陽子移動反応 / 質量分析計 / 生物起源揮発性有機化合物 / 化学反応メカニズム / プロトン移動反応質量分析計 / 化学的エイジング / 光化学チャンバー |
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| Outline of Final Research Achievements |
To investigate formation mechanisms of atmospheric secondary organic aerosol (SOA) affecting climate and human health, we developed an online instrument for the analysis of organic compounds present in aerosol particles by a combination of a home-made thermal desorption instrument and a proton transfer reaction-mass spectrometer. We studied fragmentation patterns of organic compounds with carboxyl, hydroxy, and carbonyl groups by measurements of single component aerosol particles. Then, we generated SOA particles using a smog chamber to monitor temporal changes of oxocarboxylic acid and dicarboxylic acids present in particles. We also detected highly oxygenated molecules and dimers in generated SOA particles. Furthermore, we observed atmospheric particles to detect dicarboxylic acids existing in particles.
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| Academic Significance and Societal Importance of the Research Achievements |
世界では質量分析計を活用したオンライン大気粒子分析装置が新たな研究手段として注目を集めている。本研究は陽子移動反応質量分析計の改良によってオンライン大気粒子分析装置の開発を試みたものである。有機化合物のフラグメント化の規則性や粒子生成実験や大気観測から見出された課題は技術的に有意義な情報である。SOAのオンライン計測によりオフライン分析と似た有機化合物が検出されたことは、従来のオフライン分析に基づく知識の定性的な有効性を示しており学術的意義がある。さらに本研究でSOA中に二量体を検出した成果は、モデル研究者と共同で進めている大気微小粒子状物質予測モデルの高精度化にも貢献した。
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Report
(4 results)
Research Products
(22 results)
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[Journal Article] Studying volatility from composition, dilution, and heating measurements of secondary organic aerosols formed during α-pinene ozonolysis2018
Author(s)
Sato, K., Y. Fujitani, S. Inomata, Y. Morino, K. Tanabe, S. Ramasamy, T. Hikida, A. Shimono, A. Takami, A. Fushimi, Y. Kondo, T. Imamura, H. Tanimoto and S. Sugata
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Journal Title
Atmospheric Chemistry and Physics
Volume: 18
Issue: 8
Pages: 5455-5466
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Interpretation of toluene secondary aerosol yield curves by peroxy radical autoxidation chemistry2019
Author(s)
Sato, K., Morino, Y., Tanabe, K., Imamura, T., Ramasamy, S., Fushimi, A., Enami, S., Inoamta, S., Takami, A.
Organizer
第36回化学反応討論会
Related Report
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[Presentation] Interpretation of toluene secondary aerosol yield curves and volatilities by peroxy radical autoxidation chemistry2019
Author(s)
Sato, K., Morino, Y., Tanabe, K., Imamura, T., Ramasamy, S., Fushimi, A., Enami, S., Inoamta, S., Takami, A.
Organizer
European Aerosol Conference 2019
Related Report
Int'l Joint Research
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[Presentation] Effects of Criegee intermediate scavengers on secondary organic aerosol formation from alpha-pinene ozonolysis2018
Author(s)
Sato, K., Enami, S., Ramasamy, S., Inomata, S., Imamura, T.
Organizer
The 10th International Aerosol Conference, St. Louis, Missouri, USA
Related Report
Int'l Joint Research
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