舗装道路表面を新たな反応場として考えるメガシティーの大気環境問題への先駆的研究

• Project/Area Number: 18K19858
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 63:Environmental analyses and evaluation and related fields
• Research Institution: Waseda University
• Principal Investigator: 島田 幸治郎 早稲田大学, 理工学術院, 助教 (70707190)
• Co-Investigator(Kenkyū-buntansha): 茶谷 聡 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, 主任研究員 (40394837)
• Project Period (FY): 2018-06-29 – 2021-03-31
• Project Status: Granted (Fiscal Year 2019)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: メガシティー / 大気環境問題 / 反応場 / 舗装道路 / 揮発性有機物質 / 光分解

Outline of Annual Research Achievements

本研究では、大気汚染物質の未考慮の「反応場」に注目し、都市大気中に存在するほとんどの有機エアロゾルが最終到達点となる舗装道路表面での化学反応に注目して行っている。舗装道路表面は多くの化学物質が沈着していると考えられ、なおかつ大気より高温になるため、化学反応が促進される舗装道路表面を新しい重要な反応場として提案することを目的としている。早稲田大学、西早稲田キャンパスの明治道路沿いにおいて2019年―2020年の夏季と冬季に、アスファルトと建物屋上の建材を用いてエアロゾルを沈着させる環境試料の採取を行った。さらに、VOCの放出速度を精度よく測定するためにエアロゾル工学に基づき作成したチャンバーを作成し、模擬太陽光を照射する実験系を構築した。しかし、COVID１９により実験が中断している状況である。

Current Status of Research Progress

3: Progress in research has been slightly delayed.

Reason

科研費採択者の職場の異動、COVID１９および機材故障による中断などが重なったため。

Strategy for Future Research Activity

COVID１９が収束し、大学が再開次第、VOCの放出速度の実験を再開する。その後、ボックスモデルを用いて東京都23区内の舗装道路で発生するVOCが、オゾン生成へどの程度寄与しているのか試算を行う。

Research Products

• [Int'l Joint Research] 香港理工大学(中国)
• [Int'l Joint Research] 香港/香港理工大学(その他の国・地域)
• [Journal Article] Degradation of PAHs during long range transport based on simultaneous measurements at Tuoji Island, China, and at Fukue Island and Cape Hedo, Japan (2020)
  • Author(s): Shimada K, Nohchi M, Yang X, Sugiyama T, Miura K, Takami A, Sato K, Chen X, Kato S, Kajii Y, Meng F, Hatakeyama S
  • Journal Title: Environmental Pollution Volume: 260 Pages: 113906-113906
  • DOI: 10.1016/j.envpol.2019.113906
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Estimation of background PM2.5 concentrations for an air-polluted environment (2020)
  • Author(s): Wang S-H, Hung R-Y, Lin N-H, Gómez-Losada Á, Pires J. C.M., Shimada K, Hatakeyama S, Takami A
  • Journal Title: Atmospheric Research Volume: 231 Pages: 104636-104636
  • DOI: 10.1016/j.atmosres.2019.104636
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Seasonal and annual changes in PAHs transported from East Asia to Cape Hedo, Okinawa (2019)
  • Author(s): Miura K., Shimada K, Sugiyama T, Sato K, Takami A, Chan K. C, Kim P. Y, Lin N-H, Hatakeyama S
  • Journal Title: Scientific Reports Volume: 9 Pages: 12591-12591
  • DOI: 10.1038/s41598-019-47409-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Sources of High Sulfate Aerosol Concentration Observed at Cape Hedo in Spring 2012 (2019)
  • Author(s): Itahashi S, Hatakeyama S, Shimada K, Takami A
  • Journal Title: Aerosol and Air Quality Research Volume: 19
  • DOI: 10.4209/aaqr.2018.09.0350
  • Peer Reviewed / Open Access
• [Presentation] Degradation of PAHs during long range transport based on simultaneous measurements at Tuoji Island, China, and at Fukue Island and Cape Hedo, Japan (2019)
  • Author(s): Shimada K, Nohchi1 M, Yang X, Sugiyama T, Miura K, Takami A, Sato K, Chen X, Meng F, Hatakeyama S
  • Organizer: AAC meeting (2019/5).
  • Int'l Joint Research
• [Presentation] The Impact of Particulate Matters on the Formation and Chemistry of Tropical Heavy Rain Accompanied by Squall (2019)
  • Author(s): Kajikawa T, Okochi H, Nakano T, Shimada K
  • Organizer: AAC meeting
  • Int'l Joint Research
• [Presentation] , The Impact of Particulate Matters on the Formation and Chemistry of Tropical Heavy Rain Accompanied by Squall (2019)
  • Author(s): Kajikawa T, Okochi H, Nakano T, Shimada K, Uchida E, Nakagawa T, Matsui T, Ishizuka M, Arai T, Lay P, Hang P
  • Organizer: The 28th Symposium on Environmental Chemistry
  • Int'l Joint Research
• [Presentation] Observation of Cloud Water Chemistry in the Free Troposphere and the Atmospheric Boundary Layer on Mt. Fuji (6) (2019)
  • Author(s): Okochi H, Dairiki M, Nakamura M, Tahara D, Takemura N, Nakano T, Shimada K, Katumi N, Minami Y, Takeuchi M, Toda K, Kato S, Wada R, Miura K, Nonemochi S, Hatakeyama S, Dokiya Y
  • Organizer: IFDA2019, 8th International Conference on Fog, Fog Collection and Dew
  • Int'l Joint Research
• [Presentation] Air pollution and its impact of rain- and dew-water chemistry in Siem Reap-Angkor region of Cambodia (2019)
  • Author(s): Kajikawa T, Okochi H, Shimada K, Nakano T, Uchida E, Ishizuka M, Nakagawa T, Matsui T, Lay P, Hang P
  • Organizer: IFDA2019, 8th International Conference on Fog, Fog Collection and Dew
  • Int'l Joint Research
• [Presentation] Observation of Cloud Water Chemistry in the Free Troposphere and the Atmospheric Boundary Layer on Mt. Fuji (5) (2019)
  • Author(s): Dairiki M, Okochi H, Nakamura M, Tahara D, Takemura N, Nakano T, Shimada K, Katumi N, Minami Y, Takeuchi M, Toda K, Kato S, Wada R, Miura K, Yonemochi S, Hatakeyama S, Dokiya Y,
  • Organizer: IFDA2019, 8th International Conference on Fog, Fog Collection and Dew
  • Int'l Joint Research
• [Presentation] 沖縄県辺戸岬において2012年春季に見られた高濃度硫酸塩の発生源寄与評価 (2019)
  • Author(s): 板橋秀一，畠山史郎，島田幸治郎，高見昭憲
  • Organizer: 日本地球惑星科学連合2019年大会