IRON SUPPLY AND ITS PHOTOCHEMICAL REACTIONS IN AEROSOLS COLLECTED IN OKINAWA, JAPAN

• Project/Area Number: 20310013
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: University of the Ryukyus
• Principal Investigator: ARAKAKI Takemitsu University of the Ryukyus, 理学部, 教授 (80343375)
• Co-Investigator(Kenkyū-buntansha): TANAHARA Akira 琉球大学, 理学部, 准教授 (00217100) ; ITO Akihide 琉球大学, 教育学部, 教授 (60273265)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000); Fiscal Year 2010: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2009: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2008: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
• Keywords: 物質循環 / 光化学反応 / 沖縄 / エアロゾル / 大気エアロゾル / 鉄 / ジカルボン酸

Research Abstract

This study was initiated to better elucidate behavior of iron in aerosols around Ryukyu archipelago, coral reef rich environment. Iron is a micronutrient that affects marine ecology. We investigated chemical compositions and transformation and photochemical characteristics of iron species (Fe(II) and Fe(III)) in aerosols collected at Cape Hedo Aerosol and Atmosphere Monitoring Station (CHAAMS), Kume Island (ca. 100 km west of Naha city) and Minami-Daitou Island (ca. 360 km east of Naha city).

Research Products

• [Journal Article] 沖縄辺戸岬で採取した大気エアロゾル中の過塩素酸イオン (2010)
  • Author(s): 半田大士、岡田孝一郎、中島仁美、新垣雄光
  • Journal Title: エアロゾル研究 25(3) Pages: 269-273
  • NAID: 130000420878
• [Journal Article] Contribution of Fulvic Acid on Photochemical Formation of Fe (II) in Acidic Suwannee River Fulvic Acid Solutions (2010)
  • Author(s): Arakaki, T., K. Saito, K.Okada, H.Nakajima, Y. Hitomi
  • Journal Title: Chemosphere Vol.78, Issue 8 Pages: 1023-1027
• [Journal Article] Radiocarbon analysis of BC and OC in PM_<10> aerosols at Cape Hedo, Okinawa, Japan, during long-range transport events from East Asian countries (2010)
  • Author(s): Handa D., H.Nakajima, T. Arakaki, H. Kumata, Y. Shibata, M. Uchida
  • Journal Title: Nuclear Instruments and Methods in Physics, B 268 Pages: 1125-1128
• [Journal Article] Photochemical Formation of Hydroxyl Radical in Red-Soil-Polluted Seawater on the North of Okinawa Island, Japan (2010)
  • Author(s): Arakaki, T., A.M., Hamdun, M. Uehara, K.Okada
  • Journal Title: Water, Air and Soil Pollution 209 Pages: 191-198
• [Journal Article] Bimolecular rate constant between levoglucosan and hydroxyl radical : Effects of pH and temperature (2010)
  • Author(s): Teraji, T., T. Arakaki
  • Journal Title: Chemistry Letters Vol.39, No.8 Pages: 900-901
  • NAID: 10027184310
• [Journal Article] Bimolecular rate constant between levoglucosan and hydroxyl radical : Effects of pH and temperature (2010)
  • Author(s): Teraji, T., T.Arakaki
  • Journal Title: Chemistry Letters Volume: 39 Pages: 900-901
  • NAID: 10027184310
  • Peer Reviewed
• [Journal Article] 沖縄辺戸岬で採取した大気エアロゾル中の過塩素酸イオン (2010)
  • Author(s): 半田大士、岡田孝一郎、中島仁美、新垣雄光
  • Journal Title: エアロゾル研究 Volume: 25 Pages: 269-273
  • NAID: 130000420878
  • Peer Reviewed
• [Journal Article] 環境中で光化学反応により生成する活性酸素について (2010)
  • Author(s): 新垣雄光
  • Journal Title: 光化学 Volume: 41 Pages: 149-152
  • NAID: 10027623492
• [Journal Article] Contribution of Fulvic Acid on Photochemical Formation of Fe(II)in Acidic Suwannee River Fulvic Acid Solutions (2010)
  • Author(s): Arakaki, T., K.Saito, K.Okada, H.Nakajima, Y.Hitomi
  • Journal Title: Chemosphere 78 Pages: 1023-1027
  • Peer Reviewed
• [Journal Article] Radiocarbon analysis of BC and OC in PM10 aerosols at Cape Hedo, Okinawa, Japan, during long-range transport events from East Asian countries (2010)
  • Author(s): Handa, D., H.Nakajima, T.Arakaki, H.Kumata, Y.Shibata, M.Uchida
  • Journal Title: Nuclear Instruments and Methods, B 268 Pages: 1125-1128
  • Peer Reviewed
• [Journal Article] Photochemical formation of peroxides and fluorescence characteristics of water-soluble fraction of bulk aerosols collected in Okinawa, Japan (2008)
  • Author(s): Nakajima H., K.Okada, Y. Kuroki, Y. Nakama, D. Handa, T. Arakaki, A.Tanahara
  • Journal Title: Atmospheric Environment Vol.42 Pages: 3046-4058
• [Journal Article] 沖縄の大気中過酸化物の計測と挙動に関する研究 (2008)
  • Author(s): 伊古田博嗣、小谷有司、中島仁美、岡田孝一郎、新垣雄光、棚原朗
  • Journal Title: 地球化学 42 Pages: 69-77
• [Presentation] Analysis of Spatial and Temporal Distribution of Water-Soluble Anions and Organic Carbons Transported from East Asia in Bulk Aerosols Collected at the Okinawa Islands, Japan. (2010)
  • Author(s): Somada Y., S.Azechi, M. Ijyu, F.Nakaema, D. Handa, T. Arakaki, A.Tanahara, M. Furukawa
  • Organizer: PacifiChem 2010
  • Place of Presentation: Honolulu, Hawaii
  • Year and Date: 2010-12-19
• [Presentation] Analysis of Spatial and Temporal Distribution of Acid-Digested Metals Transported from East Asia in Bulk Aerosols Collected at the Okinawa Archipelago, Japan. (2010)
  • Author(s): Azechi, S., Y. Somada, M. Ijyu, F.Nakaema, D. Handa, T. Arakaki, A.Tanahara, A. Itoh
  • Organizer: PacifiChem 2010
  • Place of Presentation: Honolulu, Hawaii
  • Year and Date: 2010-12-19
• [Presentation] Long-term observation of water-soluble chemical components in the total suspended particles collected at Okinawa, Japan. (2010)
  • Author(s): Handa D., K.Okada, Y. Kuroki, Y. Nakama, H.Nakajima, Y. Somada, M. Ijyu, S.Azechi, F.Nakaema, T. Arakaki, A.Tanahara
  • Organizer: PacifiChem 2010
  • Place of Presentation: Honolulu, Hawaii
  • Year and Date: 2010-12-19
• [Presentation] Long-term observation of water-soluble chemical components in the total suspended particles collected at Okinawa, Japan (2010)
  • Author(s): Handa, D., K.Okada, Y.Kuroki, Y.Nakama, H.Nakajima, Y.Somada, M.Ijyu, S.Azechi, F.Nakaema, T.Arakaki, A.Tanahara.
  • Organizer: PacifiChem 2010
  • Place of Presentation: ホノルル、アメリカ
  • Year and Date: 2010-12-19
• [Presentation] Determination of the Bimolecular Rate Constants between Levoglucosan and Hydroxyl Radical-Effects of pH and Temperature. (2010)
  • Author(s): Teraji, T., T. Arakaki
  • Organizer: PacifiChem 2010
  • Place of Presentation: Honolulu, Hawaii
  • Year and Date: 2010-12-17
• [Presentation] Fe(II)光生成に対するフルボ酸の寄与 (2010)
  • Author(s): 新垣雄光、斉藤究、岡田孝一郎、中島仁美
  • Organizer: 光化学討論会
  • Place of Presentation: 千葉大学
  • Year and Date: 2010-09-10
• [Presentation] Elemental composition and Its seasonal variation of bulk aerosols collected at the Okinawa archipelago, Japan. (2010)
  • Author(s): Itoh, A., S. Ohshiro, S.Azechi, D. Handa, T. Arakaki
  • Organizer: EGU 2010
  • Place of Presentation: Vienna, Austria Poster Presentation
  • Year and Date: 2010-05-07
• [Presentation] Impacts of long-range transport of metals from East Asia in bulk aerosols collected at the Okinawa archipelago, Japan. (2010)
  • Author(s): Azechi, S., Y. Somada, M. Ijyu, F.Nakaema, D. Handa, T., Arakaki, A.Tanahara
  • Organizer: EGU 2010
  • Place of Presentation: Vienna, Austria Poster Presentation
  • Year and Date: 2010-05-07
• [Presentation] Long-term observation of water-soluble chemical components in the bulk atmospheric aerosols collected at Okinawa, Japan. (2010)
  • Author(s): Handa D., Y. Somada, M. Ijyu, S.Azechi, F.Nakaema, T. Arakaki, A.Tanahara
  • Organizer: EGU 2010
  • Place of Presentation: Vienna, Austria Poster Presentation
  • Year and Date: 2010-05-07
• [Presentation] Molar Absorptivity and Concentration-Dependent Quantum Yield of Fe (II) Photo-Formation for the Aqueous Solutions of Fe (III)-Dicarboxylate Complexes (2009)
  • Author(s): Hitomi, Y., T. Arakaki
  • Organizer: AGU 2009 Fall Meeting
  • Place of Presentation: San Francisco, California, U.S.A Poster Presentation
  • Year and Date: 2009-12-15
• [Presentation] Spatial distribution and temporal variation of chemical species in the bulk atmospheric aerosols collected at the Okinawa archipelago, Japan (2009)
  • Author(s): Handa D., Y. Somada, M. Ijyu, S.Azechi, F.Nakaema, T. Arakaki, A.Tanahara
  • Organizer: AGU 2009 Fall Meeting
  • Place of Presentation: San Francisco, California, U.S.A Poster Presentation
  • Year and Date: 2009-12-14
• [Presentation] 沖縄大気エアロゾルに含まれる化学成分の経年変化と季節変動～金属成分について～ (2009)
  • Author(s): 畦地総太郎、半田大士、中島仁美、仲栄真史哉、岡田孝一郎、新垣雄光、棚原朗
  • Organizer: 第26回日本エアロゾル科学・技術討論会
  • Place of Presentation: 岡山大学
  • Year and Date: 2009-08-19
• [Presentation] 沖縄大気エアロゾルに含まれる化学成分の経年変化と季節変動～水溶性成分について～ (2009)
  • Author(s): 半田大士、畦地総太郎、中島仁美、仲栄真史哉、岡田孝一郎、新垣雄光、棚原朗
  • Organizer: 第26回日本エアロゾル科学・技術討論会
  • Place of Presentation: 岡山大学
  • Year and Date: 2009-08-19
• [Presentation] Photochemical Formation of Fe (II) in the Aqueous Solutions of Fe (III)-Dicarboxylates (2009)
  • Author(s): Hitomi, Y., K.Okada, T. Arakaki
  • Organizer: EGU 2009
  • Place of Presentation: Vienna, Austria Poster Presentation
  • Year and Date: 2009-04-21
• [Presentation] Photochemical Formation of Fe(II)in the Aqueous Solutions of Fe(III)-Dicarboxylates (2009)
  • Author(s): Hitomi, Y., K.Okada, T.Arakaki
  • Organizer: EGU 2009
  • Place of Presentation: ウイーン、オーストリア
  • Year and Date: 2009-04-21
• [Presentation] Radiocarbon Analysis of Elemental Carbon and Total Organic Carbon in Atmospheric Aerosols Collected at Cape Hedo, Okinawa, Japan (2008)
  • Author(s): Arakaki, T., D. Handa, H.Nakajima, H. Kumata, Y. Shibata, M. Uchida
  • Organizer: AGU 2008 Fall Meeting
  • Place of Presentation: San Francisco, California, U.S.A Poster Presentation
  • Year and Date: 2008-12-17
• [Presentation] Seasonal variation of water-soluble chemical components in the bulk atmospheric aerosols collected at Okinawa Island, Japan (2008)
  • Author(s): Handa D., H.Nakajima, F.Nakaema, T. Arakaki, A.Tanahara
  • Organizer: AGU 2008 Fall Meeting
  • Place of Presentation: San Francisco, California, U.S.A Poster Presentation
  • Year and Date: 2008-12-15
• [Presentation] Seasonal variation of water-soluble chemical components in the bulk atmospheric aerosols collected at Okinawa Island, Japan (2008)
  • Author(s): Handa, D., T. Arakaki, 他3名
  • Organizer: 2008 AGU Fall Meeting
  • Place of Presentation: サンフランシスコ
  • Year and Date: 2008-12-15
• [Presentation] Radiocarbon analysis of elemental carbon in PM_<10> aerosols at Cape Hedo, Okinawa, Japan (2008)
  • Author(s): Handa D., H.Nakajima, T. Arakaki, H. Kumata, Y. Shibata, M. Uchida
  • Organizer: during a long range transport event from East Asian countries, AMS11
  • Place of Presentation: Rome, Italy
  • Year and Date: 2008-09-14
• [Presentation] 沖縄辺戸岬で採取した大気エアロゾル中の水溶性化学成分の季節変動 (2008)
  • Author(s): 半田大士、新垣雄光、中島仁美、仲栄真史哉、棚原朗
  • Organizer: 第25回エアロゾル科学・技術研究討論会
  • Place of Presentation: 金沢大学
  • Year and Date: 2008-08-21
• [Presentation] フルボ酸・フミン酸とヒドロキシルラジカルの二分子反応速度定数に与えるpHと温度の影響 (2008)
  • Author(s): 中島仁美、新垣雄光、Cort Anastasio
  • Organizer: 第25回エアロゾル科学・技術研究討論会
  • Place of Presentation: 金沢大学
  • Year and Date: 2008-08-21
• [Presentation] Seasonal Variations of Low Molecular Weight Dicarboxylic Acids in Atmospheric Aerosols at Okinawa Islands, Japan (2008)
  • Author(s): Nakaema, F., D. Handa, A.Tanahara, T. Arakaki
  • Organizer: EGU 2009
  • Place of Presentation: Vienna, Austria Poster Presentation
  • Year and Date: 2008-04-21
• [Book] 沖縄の空気(やわらかい南の学と思想・2)12章 (2009)
  • Author(s): 新垣雄光
  • Publisher: 沖縄タイムス社
• [Book] 融解する境界-やわらかい南の学と思想- (2009)
  • Author(s): 新垣雄光, 他27名
  • Total Pages: 331
  • Publisher: 沖縄タイムス社
• [Remarks] ホームページ等
  • URL: http://ryudai-chem.sakura.ne.jp/?p=28