Yuta Ijichi   Takeshi Ohno   Shuhei Sakata   
Geochemical Journal 52(2) e1-e6 2018年 [査読有り]
We report new results for Cu2+ adsorption on d-MnO2 and the resulting changes in Cu isotopic composition due to isotopic fractionation. The adsorption experiments were designed as a pH series (3.22–6.94) and an adsorption-desorption series. 63Cu a...
GEOCHIMICA ET COSMOCHIMICA ACTA 213 457-474 2017年9月 [査読有り]
Monohydrocalcite (MHC: CaCO3 center dot H2O), a rare carbonate mineral formed under surface conditions, is usually observed in nature as containing a variable amount of Mg, with a 0.007-0.45 Mg/Ca mole ratio. The variable Mg composition in MHC is ...
Fujimura S   Muramatsu Y   Ohno T   Saitou M   Suzuki Y   Kobayashi T   Yoshioka K   Ueda Y   
Journal of Environmental Radioactivity 140 59-64 2015年2月 [査読有り]
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 139 344-350 2015年1月 [査読有り]
Iodine-131 is one of the most critical radionuclides to be monitored after release from reactor accidents due to the tendency for this nuclide to accumulate in the human thyroid gland. However, there are not enough data related to the reactor acci...
Hiroyuki Matsuzaki   Yasuyuki Muramatsu   Takeshi Ohno   Wei Mao   
EPJ Web of Conferences 153 2017年9月
Iodine-131 distribution released from the Fukushima Dai-ichi Nuclear Power Plant accident was reconstructed through the iodine-129 measurements. From nearly 1,000 surface soil samples iodine was extracted by the pyro hydrolysis method. Extracted i...