A5050648636- Radioactive element chemistry and processing
- Radioactive contamination and transfer
- Chemical Synthesis and Characterization
- Geochemistry and Elemental Analysis
- Nuclear materials and radiation effects
- Nuclear Materials and Properties
- Radioactivity and Radon Measurements
- Analytical chemistry methods development
- Layered Double Hydroxides Synthesis and Applications
- Nuclear and radioactivity studies
- Extraction and Separation Processes
- X-ray Spectroscopy and Fluorescence Analysis
- Lichen and fungal ecology
- Metal Extraction and Bioleaching
- Magnesium Oxide Properties and Applications
- Heavy metals in environment
- Arsenic contamination and mitigation
- Graphite, nuclear technology, radiation studies
- Advanced X-ray and CT Imaging
- Clay minerals and soil interactions
- Mine drainage and remediation techniques
- Geochemistry and Geologic Mapping
- Electron and X-Ray Spectroscopy Techniques
- Soil and Unsaturated Flow
- Electrochemical Analysis and Applications
Japan Atomic Energy Agency
2015-2024
Advanced Science Research Center
2015-2024
Kyoto University
2009
The Graduate Center, CUNY
2007
National Institute of Advanced Industrial Science and Technology
2007
Nagoya University
2007
Pennsylvania State University
1998
Tokai University
1996
A wearable microfluidic system and smartphone optics module enabled <italic>in situ</italic> analysis of sweat.
Here we report for the first time, extremely high and selective uptake of transition metal cations such as Cu2+, Ni2+, Co2+ Zn2+ by two anionic clays nominal composition, [Mg6Al2(OH)16 ]2+[CO3·4H2O]2– [Mg2Al(OH)6 ]+[NO3·2H2O]–. We postulate that principal mechanism this cation is substitution in clay structure mainly Mg through a process known diadochy. This newly discovered function useful decontamination immobilization above metals at room temperature may find applications remediation...
We studied the adsorption behavior of radioactive cesium (Cs) by non-mica minerals kaolinite, halloysite, chlorite, montmorillonite, mordenite, MnO2, TiO2, Al2O3, and FeOOH to elucidate environmental Cs fallout from Fukushima Daiichi Nuclear Power Plant in Tohoku region Japan. The desorption experiments on were carried out at concentrations 1 × 10−4, 10−5, 2 10−9 mole L−1 pH 5.5. was examined using 0.1 LiCl, NaCl, KCl, RbCl, CsCl solutions. sequential a LiCl solution, KCl HCl solution....
The chemical states of radioactive Cs (caused by Fukushima Daiichi Nuclear Power Plant accident) in the contaminated soils have been characterized desorption experiments using appropriate reagent solutions and size fractionation soils. More than 65% remained residual fraction soil samples after treatment 1 mole L−1 NH4Cl solution CH3COOH solution. Approximately 70% were associated with fractions larger elutriated one, even though mica-like minerals present one. These results strongly suggest...
A calcium (Ca)-deficient hydroxyapatite was investigated for its potential to remove Sr2+ from environmentally relevant water. We conducted sorption tests on solutions containing magnesium ion (Mg2+) and (Ca2+) as competing cations at a strontium (Sr2+) concentration of 0.05 mmol/L. The Ca-deficient maintained high ratio above 80% in the presence Mg2+ Ca2+ concentrations between 0.1 1.0 mmol/L, whereas stoichiometric showed lower even small amounts (72% 51% mmol/L). For with various 0.01 10...
Miscanthus sinensis Andersson is a pioneer plant species that grows naturally at mining sites. can detoxify aluminium (Al) by producing phytosiderophores, such as chlorogenic acid, citric and malic localizing Al in cell walls. Root-endophytic Chaetomium cupreum, which produces microbial siderophores, enhances tolerance M. sinensis. However, we could not determine whether the siderophores produced C. cupreum actually enhance sinensis, because have yet been identified previous research. The...
Azoarcus sp. DN11 was previously isolated from gasoline-contaminated groundwater as an anaerobic benzene-degrading bacterium. Genome analysis of strain revealed that it contained a putative idr gene cluster (idrABP1P2 ), which recently found to be involved in bacterial iodate (IO3-) respiration. In this study, we determined if performed respiration and assessed its potential use remove sequester radioactive iodine (129I) subsurface contaminated aquifers. Strain coupled acetate oxidation...
We investigated the interactions of Pu(VI) with Bacillus subtilis, kaolinite clay, and a mixture two to determine delineate role microbes in regulating environmental mobility Pu. The bacteria, kaolinite, their were exposed 4 x 10(-4) M solution at pH 5.0. amount Pu sorbed by B. subtilis increased time, but had not reached equilibrium 48 h, whereas was attained within 8 h. After oxidation state solutions changed Pu-(V), associated Pu(IV). Exudates released from reduced Pu(V). In contrast,...