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Iron uptake model by phytoplankton in actual natural water based on chemical kinetics

Research Project

Project/Area Number 25709045
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypePartial Multi-year Fund
Research Field Civil and environmental engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

Fujii Manabu  東京工業大学, 理工学研究科, 特任准教授 (30598503)

Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥24,570,000 (Direct Cost: ¥18,900,000、Indirect Cost: ¥5,670,000)
Fiscal Year 2015: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2014: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2013: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Keywords鉄 / 藻類 / 反応速度論 / 化学反応 / 鉄摂取モデル / 腐植物質 / 競合金属 / 鉄摂取 / 実環境
Outline of Final Research Achievements

Iron is important factor that control growth and metabolism of phytoplankton in natural waters. Therefore, iron chemical dynamics and bioavailablity have been investigated for the last few decades. Yet, effects of water and environmental factors on iron uptake in actual water environment remained largely unclear, partially because humic substances and other water quality factors were not considered in the previous model where synthetic ligands were often used. In this study, kinetic model for iron transformation and bioavailability was developed based on the kinetic data from phytoplankton incubational experiment under actual natural water conditions where concentrations of humic substances and other water quality factors were manipulated. One of results indicated that phytoplankton is capable of acquiring iron at sufficient amount even under the dark condition, as dark reduction in the presence of humic substances sufficiently produces biologically available ferrous iron form.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • Research Products

    (15 results)

All 2015 2014 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Acknowledgement Compliant: 2 results) Presentation (7 results) Remarks (3 results)

  • [Int'l Joint Research] ニューサウスウェールズ大学(オーストラリア)

    • Related Report
      2015 Annual Research Report
  • [Journal Article] Competitive Effects of Calcium and Magnesium Ions on the Photochemical Transformation and Associated Cellular Uptake of Iron by the Freshwater Cyanobacterial Phytoplankton Microcystis aeruginosa2015

    • Author(s)
      Fujii, M., Yeung,A. C. Y., Waite, T. D.
    • Journal Title

      Environmental Science & Technology

      Volume: 49 Issue: 15 Pages: 9133-9142

    • DOI

      10.1021/acs.est.5b01583

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Effect of ionic strength on ligand exchange kinetics between a mononuclear ferric citrate complex and siderophore desferrioxamine B2015

    • Author(s)
      Ito, H., Fujii, M., Masago, Y., Waite, T. D., Omura, T.
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: 154 Pages: 81-97

    • DOI

      10.1016/j.gca.2015.01.020

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effects of Molecular Composition of Natural Organic Matter on Ferric Iron Complexation at Circumneutral pH2014

    • Author(s)
      Fujii, M., Imaoka, A., Yoshimura, C., Waite T. D.
    • Journal Title

      Environmental Science & Technology

      Volume: 印刷中 Issue: 8 Pages: 4414-4424

    • DOI

      10.1021/es405496b

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Natural Organic Matter on Iron Uptake by the Freshwater Cyanobacterium Microcystis aeruginosa2014

    • Author(s)
      Fujii, M., Dang T. C., Bligh M Rose A. L. and Waite T. D.
    • Journal Title

      Environmental Science & Technology

      Volume: 45 Issue: 1 Pages: 365-374

    • DOI

      10.1021/es404090h

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] 自然水および下水処理水中の微量金属の溶解性に及ぼす溶存有機物の分子特性の影響2015

    • Author(s)
      菊地哲郎, 藤井学, 吉村千洋
    • Organizer
      日本地球化学会第62回年会
    • Place of Presentation
      横浜国立大学
    • Year and Date
      2015-09-14
    • Related Report
      2015 Annual Research Report
  • [Presentation] Seasonal and Spatial Variation of Dissolved Iron Transformation Kinetics in Freshwater and Treated Municipal Wastewater2015

    • Author(s)
      Y. P. Lee, M. Fujii, C. Yoshimura and T. Kikuchi
    • Organizer
      International Symposium on Concept and law of green infrastructure in rivers and coasts, Ecology and Civil Engineering Society
    • Place of Presentation
      東京工業大学
    • Year and Date
      2015-09-13
    • Related Report
      2015 Annual Research Report
  • [Presentation] Iron transportation from land to ocean and its impact on primary production -To establish a new method for watershed management2015

    • Author(s)
      Y. Endo, Y. P. Lee, T. Kikuchi, M. Natsuike, M. Fujii, C. Yoshimura, T. Sakuraba, H. Ito and T. Watanabe
    • Organizer
      International Symposium on Concept and law of green infrastructure in rivers and coasts, Ecology and Civil Engineering Society
    • Place of Presentation
      東京工業大学
    • Year and Date
      2015-09-13
    • Related Report
      2015 Annual Research Report
  • [Presentation] Seasonal and spatial variation of dissolved iron transformation kinetics in the Shizugawa bay and its adjacent rivers2015

    • Author(s)
      Y. P. Lee, M. Fujii, C. Yoshimura and T. Kikuchi
    • Organizer
      Japan Geoscience Union Meeting
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2015-05-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] 化学反応速度論による藍藻類Microcystis aeruginosaの鉄摂取機構解明2014

    • Author(s)
      藤井学
    • Organizer
      日本陸水学会第79回大会
    • Place of Presentation
      筑波大学(茨城県・つくば市)
    • Year and Date
      2014-09-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] 微量金属と放射性物質に関する最近の研究~藻類による鉄摂取と阿武隈川の放射性セシウム動態~2014

    • Author(s)
      藤井学
    • Organizer
      第1回環境水質工学シンポジウム
    • Place of Presentation
      東北大学(宮城県・仙台市)
    • Year and Date
      2014-05-09
    • Related Report
      2014 Annual Research Report
  • [Presentation] Effects of Molecular Composition of Natural Organic Matters on Iron Complexation2014

    • Author(s)
      Fujii, M., Imaoka, A., Yoshimura, C
    • Organizer
      2014 Ocean Science Meeting
    • Place of Presentation
      米国ハワイ
    • Related Report
      2013 Annual Research Report
  • [Remarks] Manabu Fujii at Tokyo Tech

    • URL

      https://sites.google.com/site/manabufujiiattit/home

    • Related Report
      2015 Annual Research Report 2014 Annual Research Report
  • [Remarks] Manabu Fujii at Tokyo Tech

    • URL

      https://sites.google.com/site/manabufujiiattit/home

    • Related Report
      2013 Annual Research Report
  • [Remarks] water environment lab

    • URL

      https://sites.google.com/site/waterenvironmentlab/home

    • Related Report
      2013 Annual Research Report

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Published: 2013-05-21   Modified: 2019-07-29  

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