naa a22 4500 510752519 CHVBK 20180411083109.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11270-012-1428-6 doi (NATIONALLICENCE)springer-10.1007/s11270-012-1428-6 Radiocesium Fallout in Surface Soil of Tomakomai Experimental Forest in Hokkaido due to the Fukushima Nuclear Accident [Elektronische Daten] [Le Hao, Miyako Nitta, Ryoko Fujiyoshi, Takashi Sumiyoshi, Chau Van Tao] Traces of short- and long-lived fallout 134Cs and 137Cs were found in surface soil (volcanic ash soil) under a cool-temperate deciduous stand at Tomakomai Experimental Forest in Hokkaido, Japan after the Fukushima nuclear accident in March 2011. Most of them were present in the uppermost 5-6cm of the soil. Mean concentrations of 134Cs and 137Cs were found to be 2.4 (±0.3) and 89 (±2) Bq Kg−1 in May, and 6.9 (±0.4) and 94 (±2) Bq Kg−1 in November 2011, respectively. A small increase in radiocesium concentration may result from biological activity in the uppermost portion of the soil in which fallout nuclides derived from the Fukushima NPP would not have existed in May. They were supposed to be fallen down on the fresh litter layer in the previous year. The results of a sequential extraction experiment with 1M CH3COONH4 solution showed that desorption of radiocesium from the soil was difficult and not simple ion exchange processes. Springer Science+Business Media Dordrecht, 2013 Fallout nationallicence 134Cs nationallicence 137Cs nationallicence Volcanic soil nationallicence Fukushima nuclear accident nationallicence Hao Le Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City, Vietnam aut Nitta Miyako Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Fujiyoshi Ryoko Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Sumiyoshi Takashi Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut Van Tao Chau Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City, Vietnam aut Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-8 0049-6979 224:2<1 2013 224 11270 https://doi.org/10.1007/s11270-012-1428-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-012-1428-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hao Le Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City, Vietnam aut NATIONALLICENCE 700 1- Nitta Miyako Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Fujiyoshi Ryoko Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Sumiyoshi Takashi Faculty of Engineering, Hokkaido University, 060-8628, Sapporo, Hokkaido, Japan aut NATIONALLICENCE 700 1- Van Tao Chau Faculty of Physics and Engineering Physics, University of Science, Ho Chi Minh City, Vietnam aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/2(2013-02-01), 1-8 0049-6979 224:2<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer