Latest Update:2017/10/05 16:15:53

IMAI Akio

IMAI Akio
Researcher Name
IMAI Akio
Div (Section) name/title
Planning Department/Fellow
Research Subject
Characteristics, origin, cycling, funcitons, and effects of organic matter in water environments
Degree(s)
Ph.D. in Civil Engineering, University of Texas at Austin
Professional Qualification(s)
Engineering,Chemistry
Environmental Speciality Field
water environment,lake
Keyword(s)
dissolved organic matter,recalcitrant dissolved organic matter,aquatic humic substances,DOM fractionation method,size exclusion chromatography with TOC detection,three-dimensional lake model,determination of iron speciation,metal speciation,algal growth potential test
Brief Description of Research
I have been studying dissolved organic matter (DOM) in water environments since around 1995. Research topics are wide in variety: characteritics and orignis of DOM in lake and river, effects of DOM on algal blooming cyanobacteria, trihalomethane formation potential of DOM, characterization of DOM in effluent from wastewater treatment plants, voltammetric determination of iron speciation in freshwaters, growth characteristics of water-bloom forming cyanobacteria, stable and radioactive carbon isotopic ratios of lake and river DOM, iron speciation in river and lake, dissolved carbohydrates and their composition in lake water, characterization of DOM using three-dimensional excitation-emission matrix fluorescence spectra, quantification of Microcystis in lakewater by Real-time PCR, molecular size determination of DOM by size exclusion chromatograpy with TOC detection, and so on.
Career
Research Assistant, 1982-1988, Unversity of Texas at Austin, USA
Researcher, National Institute for Environmental Studies (NIES), 1988-1992
Senior researcher, NIES, 1992-1997
Leader, NIES, 1997-present
URL
http://www.nies.go.jp/aquaterra/member/imai.html
Membership of Academic Society
Japan Society on Water Environment (JSWE),The Japanese Society of Limnology,Japan Society of Civil Engineers (JSCE),The International Water Association,American Chemical Society,American Society of Limnology and Oceanography
Research Subject
  • Fiscal Year: 2017
    • 23853 : Regional Environmental Research
    • 23885 : Long-term monitoring projects of freshwater ecosystems
    • 24020 : Evaluation of organic carbon budgets in Lake Biwa for management of water quality and ecosystem
    • 24069 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
  • Fiscal Year: 2016
    • 23394 : Regional Environmental Research
    • 23478 : Long-term monitoring projects of freshwater ecosystems
    • 23599 : Continuous operation system of microalgae production optimized for sustainable tropical aquaculture
    • 23601 : Evaluation of organic carbon budgets in Lake Biwa for management of water quality and ecosystem
    • 23736 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
  • Fiscal Year: 2015
    • 23010 : Assessment of functions and integrity of basin ecosystems
    • 23011 : Evaluation on linkage between ecosystem function and environmental factor in river basin
    • 23034 : Monitoring projects and database management of biodiversity and ecosystem
    • 23313 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
    • 23314 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
    • 23334 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
  • Fiscal Year: 2014
    • 22598 : Assessment of functions and integrity of basin ecosystems
    • 22599 : Evaluation on linkage between ecosystem function and environmental factor in river basin
    • 22622 : Monitoring projects and database management of biodiversity and ecosystem
    • 22751 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
    • 22753 : Development of nonradioactive method for the measurement of bacterial secondary produciton rate
    • 22754 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
    • 22798 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
    • 22968 : Novel lake ecosystem management by sustainable harvesting and effective utilization of aquatic weed biomass
  • Fiscal Year: 2013
    • 22182 : Assessment of functions and integrity of basin ecosystems
    • 22183 : Evaluation on linkage between ecosystem function and environmental factor in river basin
    • 22206 : Monitoring projects and database management of biodiversity and ecosystem
    • 22275 : Study on linkages between molecular size, chemical composition and reactivity of dissolved organic matter in aquatic environments
    • 22276 : Development of nonradioactive method for the measurement of bacterial secondary produciton rate
    • 22293 : Study on quantitative evaluation of a black-box-type autochthonous loading in lake environments−Benthic fluxes from sediments to the water column
    • 22449 : Regional environmental assessment of radioactive materials based on the multimedia modelling and strategic monitoring
    • 22472 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
  • Fiscal Year: 2012
    • 21753 : Assessment of functions and integrity of basin ecosystems
    • 21754 : Evaluation on linkage between ecosystem function and environmental factor in river basin
    • 21777 : Monitoring projects and database management of biodiversity and ecosystem
    • 21827 : Flux estimation from sediment in nutrients and global warming gas by MRI and stable isotope analysis
    • 21913 : Regional environmental assessment of radioactive materials based on the multimedia modelling and strategic monitoring
  • Fiscal Year: 2011
    • 21278 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
    • 21279 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
    • 21311 : Assessment of functions and integrity of basin ecosystems
    • 21312 : Evaluation on linkage between ecosystem function and environmental factor in river basin
    • 21335 : Monitoring projects and database management of biodiversity and ecosystem
    • 21513 : Development of a technique for calculating algal-derived organic carbon level in lake
    • 21647 : Study on multimedia modeling and long-term monitoring for radioactive substance
    • 21678 : Studies of carbon cycling within river watershed by the analysis of 13C natural abundance of dissolved inorganic carbon (DIC) in lotic environments
    • 21689 : The analysis of nitrogen loading and discharge within watershed by nitrogen and oxygen isotope measurement of nitrate, dissolved or suspended organic matter
  • Fiscal Year: 2010
    • 20868 : Studies on dissolved organic matter in aquatic environments
    • 20872 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
    • 20873 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
    • 21025 : Terrestrial Monitoring
    • 21241 : Development of Watershed Environmental Impact Assessment Procedure
  • Fiscal Year: 2009
    • 20472 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
    • 20473 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
    • 20474 : Origin, characteristics and mass balance of recalcitrant dissolved organic matter in lake
    • 20650 : Terrestrial Monitoring
    • 20669 : Studies on dissolved organic matter in aquatic environments
    • 20695 : Development of Watershed Environmental Impact Assessment Procedure
  • Fiscal Year: 2008
    • 20059 : Cycling of organic matter and its interactivity with microbial ecosystem in lake
    • 20097 : Development of Watershed Environmental Impact Assessment Procedure
    • 20160 : Terrestrial Monitoring
    • 20342 : Studies on dissolved organic matter in aquatic environments
    • 20343 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
    • 20345 : Determination of origins of dissolved organic matter using enantiomers of amino acids
    • 20392 : Examination on Environmental Quality Standards for Conservation of the Living Environment in F.Y. 2008 (field observation and mechanism study)
  • Fiscal Year: 2007
    • 10380 : Biological community and material recycling monitoring of the ecotone inLake Kasumigaura
    • 10441 : Determination of iron specition in lake and its effects through iron availability on algal blooming
    • 10490 : Development of chromatograhy system with organic cabon detection for evaluating characteristics and reactivity of dissolved organic matter in aquatic systems
    • 10588 : Development of Watershed Environmental Impact Assessment Procedure
    • 10595 : Terrestrial Monitoring
    • 10606 : Studies on dissolved organic matter in aquatic environments
    • 10690 : Determination of origins of dissolved organic matter using enantiomers of amino acids
    • 10713 : Studies on origin and dynamics of recalcitrant organic matter in oligotrophic Lake Towada
  • Fiscal Year: 2006
    • 10027 : Biological community and material recycling monitoring of the ecotone inLake Kasumigaura
    • 10051 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
    • 10077 : Pilot Project on Mekong River Ecosystem Monitoring
    • 10165 : Determination of iron specition in lake and its effects through iron availability on algal blooming
    • 10234 : Development of chromatograhy system with organic cabon detection for evaluating characteristics and reactivity of dissolved organic matter in aquatic systems
    • 10321 : Development of Watershed Environmental Impact Assessment Procedure
    • 10328 : Terrestrial Monitoring
    • 10339 : Studies on dissolved organic matter in aquatic environments
  • Fiscal Year: 2005
    • 9328 : Global Environmental Monitoring
    • 9353 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
    • 9394 : Study on aquatic humic substances in the aquatic environment
    • 9448 : Studies on assessment of restration technology of wetland ecosystem
    • 9475 : Biological community and material recycling monitoring of the ecotone inLake Kasumigaura
    • 9522 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
    • 9548 : Pilot Project on Mekong River Ecosystem Monitoring
    • 9661 : Determination of iron specition in lake and its effects through iron availability on algal blooming
  • Fiscal Year: 2004
    • 8935 : Global Environmental Monitoring
    • 8989 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
    • 9028 : Study on aquatic humic substances in the aquatic environment
    • 9093 : Evaluation and monitoring of lake-water quality as drinking water source by using DOM frationation methods
    • 9165 : Studies on assessment of restration technology of wetland ecosystem
    • 9193 : Biological community and material recycling monitoring of the ecotone inLake Kasumigaura
    • 9273 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
    • 9299 : Pilot Project on Mekong River Ecosystem Monitoring
  • Fiscal Year: 2003
    • 8599 : Global Environmental Monitoring
    • 8649 : Studies on mass balance of dissolved organic matter in lake and its functions and effects on lacustrine ecosystems and water quality
    • 8658 : Study on development of assesment methods for water pollultion and monitoring methods for toxic cyanobacteria in water resource regions in Asia
    • 8706 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
    • 8746 : Study on aquatic humic substances in the aquatic environment
    • 8813 : Evaluation and monitoring of lake-water quality as drinking water source by using DOM frationation methods
    • 8900 : Studies on assessment of restration technology of wetland ecosystem
    • 8923 : Biological community and material recycling monitoring of the ecotone inLake Kasumigaura
  • Fiscal Year: 2002
    • 8306 : Global Environmental Monitoring
    • 8367 : The research about the analysis of water environment ecosystem and the evaluation of the restoration effect based on the organic and nutrient salts in lakes and marshes
    • 8377 : Evaluation on dynamics and trihalomethane formation potential of recalcitrant dissolved organic matter in lake water
    • 8401 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (4) Studies on the environmental management in coastal zones
    • 8431 : Studies on mass balance of dissolved organic matter in lake and its functions and effects on lacustrine ecosystems and water quality
    • 8441 : Study on development of assesment methods for water pollultion and monitoring methods for toxic cyanobacteria in water resource regions in Asia
    • 8528 : Study on aquatic humic substances in the aquatic environment
  • Fiscal Year: 2001
    • 8000 : Global Environmental Monitoring
    • 8121 : The research about the analysis of water ecosystem and the evaluation of the restoration effect based on the organic and nutrient salts in lakes and marshes
    • 8131 : Evaluation on dynamics and trihalomethanes formation potential of recalcitrant dissolved organic matter in lake water
    • 8154 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (4) Studies on the environmental management in coastal zones
    • 8215 : Studies on mass balance of dissolved organic carbon in lake and its effects on lake ecosystems and water quality
    • 8225 : O-1 Study on development of assesment methods for water pollultion and monitoring methods for toxic cyanobacteria in water resource regions in Asia
    • 8291 : Study on aquatic humic substances in the aquatic environment
Research Result (Publication)
  • all
  • Original Paper
  • Other Publications
Research Result (Presentation)
  • all
  • Research Presentation
  • Research Lecture