A5060391703- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Nuclear and radioactivity studies
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Radioactive element chemistry and processing
- Astro and Planetary Science
- Hydrocarbon exploration and reservoir analysis
- Planetary Science and Exploration
- Methane Hydrates and Related Phenomena
- Analytical chemistry methods development
- Geochemistry and Elemental Analysis
- Radiation Detection and Scintillator Technologies
- Geological and Geochemical Analysis
- Groundwater flow and contamination studies
- Infrared Target Detection Methodologies
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Meteorological Phenomena and Simulations
- earthquake and tectonic studies
- Mercury impact and mitigation studies
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Remote Sensing and LiDAR Applications
Institute for Environmental Sciences
2015-2025
Kyushu University
2007
Kyoto University
2004
Culture Resource
2003
Akita University
1993-2003
Mitsubishi Materials (Japan)
1999-2002
Sumco Corporation (Japan)
2002
National Research Institute
2001
Earthquake Engineering Research Institute
1999
The University of Tokyo
1999
We developed a rapid, simple method for the iodine speciation analysis of water and applied it to natural samples. Simultaneous determinations I(-) IO3(-) were achieved with an HPLC system amperometric detection spectrophotometric after postcolumn reaction IO3(-). determined concentrations in 20-μL samples within 10 min. Total I decomposition organics by off-line UV irradiation 30 min, followed reduction I(-). The analytical conditions optimized using test solutions rich organic matter...
After the Fukushima Dai-ichi nuclear power plant accident in March 2011, fluvial discharge of 137Cs from watersheds to rivers was analyzed between 2011 and 2021. The concentrations dissolved particulate were measured river water samples collected two (the Hiso Wariki rivers, mainly draining farmlands forests, respectively) approximately 4-7 km2 a montane area areal deposition 134+137Cs; 1-3 MBq·m-2 2011) Iitate Village, Fukushima. Over 10 yr analysis, decreased by 70 50 times, respectively,...
A large amount of radionuclides was released from the Fukushima Dai-ichi Nuclear Power Station (FDNPS) following damage caused by tsunami due to Great East Japan Earthquake on 11 March 2011. Although many in various environmental samples around FDNPS have been measured, 3H terrestrial environment has not yet reported. We present here first survey results concentrations plant collected 2011 shortly after accident. The free-water herbaceous shoots and evergreen tree leaves were considerably...