Strong association of fallout plutonium with humic and fulvic acid as compared to uranium and137Cs in Nishiyama soils from Nagasaki, Japan |
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Authors: | Y Fujikawa J Zheng I Cayer M Sugahara H Takigami A Kudo |
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Institution: | (1) Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, 590-0494 Osaka, Japan;(2) National Research Council of Canada, K1A 0R6 Ottawa, Ontario, Canada;(3) Osaka Sangyo University, 574-8530 Daito-Shi, Osaka, Japan |
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Abstract: | To investigate the formation of mobile organic plutonium, we analyzed the plutonium contents of the fulvic (FA) and humic
(HA) acids from the soil samples obtained at Nishiyama, Nagasaki, Japan. The percentages of the plutonium bound strongly to
HA and to FA vs. the total plutonium in the soil were 5–10% and 1%, respectively, at the depth of 0–0.1 m, much higher values
than those of137Cs and uranium. After being weathered for 51 years under a temperate climate, the initial highfired oxides of fallout plutonium
have become as chemically reactive plutonium from nuclear fuel reprocessing plants. |
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