期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 29, 期 58, 页码 88359-88368出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-022-23707-0
关键词
(137)Cesium; Fukushima Daiichi nuclear accident; Japanese monkeys; Muscle concentration; Transfer factor
资金
- Cooperative Research Program of The Primate Research Institute (Kyoto University)
- Act Beyond Trust
- Promotion and Mutual Aid Corporation for Private Schools of Japan
- Sumitomo Foundation
- Japan Society for the Promotion of Science KAKENHI [25517008, 16K08087, 20K06400]
Over the 10 years following the Fukushima nuclear accident, changes in the muscle Cs-137 concentration of wild Japanese monkeys were measured. The concentration decreased over time, but no significant difference was found between 2017 and 2020, suggesting a continued accumulation of Cs-137 in muscle.
Over the 10 years immediately after the Fukushima Daiichi nuclear accident, we measured the changes in the muscle Cs-137 concentration (Bq/kg) of wild Japanese monkeys living in Fukushima City, which is located approximately 70 km from the Fukushima Daiichi Nuclear Power Plant. The muscle(137)Csconcentration, which was observed at a maximum of 13,500 Bq/kg immediately after the accident, had decreased to several hundred Bq/kg 10 years later. The muscle Cs-137 concentration was significantly related to the soil contamination levels (10,000-30,000, 30,000-60,000, 60,000-100,000, and 100,000-300,000 Bq/m(2)), sex, age class (immature, mature), body weight (> 5000 g, 5000-10,000 g, < 10,000 g), and seasons (the cold period from December to April, the warm period from May to November).The value of muscle Cs-137 concentration and the aggregated transfer factor (T-ag: calculated by dividing muscle Cs-137 concentration [Bq/kg] by soil Cs-137 deposition density at the capture site [Bq/m(2)]) apparently decreased with time for several years. However, post hoc pairwise comparisons showed no difference from 2017 to 2020, and the accumulation of Cs-137 in muscle may continue for some time.
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