Extensive analysis of radiocesium concentrations in wild mushrooms in eastern Japan affected by the Fukushima nuclear accident: Use of open accessible monitoring data
Extensive analysis of radiocesium concentrations in wild mushrooms in eastern Japan affected by the Fukushima nuclear accident: Use of open accessible monitoring data
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DOI：
10.1016/j.envpol.2019.113236
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发表时间：
2019-12-01
影响因子：
8.9
通讯作者：
Hashimoto, Shoji
中科院分区：
文献类型：
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作者：
Komatsu, Masabumi;Nishina, Kazuya;Hashimoto, Shoji
福岛第一核电站事故后，人们越来越关注日本东部野生蘑菇受到放射性铯（Cs-134和Cs-137）污染的问题。在这项研究中，我们分析了从日本东部265个地方自治市收集的107种3189种野生食用蘑菇的放射性监测数据，以调查野生蘑菇中的放射性铯水平。分析结果表明，蘑菇放射性铯浓度与飞机监测的放射性沉降数据进行归一化，然后我们评估的物种，采样位置，采样年份和区域之间的偏差的影响Cs-134和Cs-137的活动的标本使用分层贝叶斯方法考虑空间自相关（一个内在的CAR模型）。按物种分列的标准化放射性浓度范围为1.1 x 10（-4）至2.3 x 10（-2）（米（2）千克（-1），鲜重）。正如以前的研究报告，菌根物种往往有较高的放射性铯浓度。一些腐殖物种（如黄伞）的浓度也很高。对于在切尔诺贝利事故后的研究中也进行了评估的蘑菇物种，我们发现相同的物种具有相似的吸收能力趋势。结果表明，对公众监测数据的广泛分析有助于了解蘑菇污染状况，并根据种类和地区评估食用野生蘑菇的内照射剂量。(C)2019爱思唯尔有限公司版权所有。
After the Fukushima Daiichi Nuclear Power Plant accident, there has been an increasing concern regarding the contamination of wild mushrooms with radiocesium (Cs-134 and Cs-137) in eastern Japan. In this study, we analyzed the radioactivity monitoring data of 3189 wild edible mushrooms of 107 species collected by the 265 local municipalities in eastern Japan to investigate the radiocesium levels in wild mushrooms. Results of the analysis showed that radiocesium concentrations in mushrooms were normalized with radioactivity deposition data from aircraft monitoring, and then we evaluated the effects of species, sampled location, sampling year and regional deviation between Cs-134 and Cs-137 activity of specimens using a hierarchical Bayesian approach considering spatial autocorrelation (an intrinsic CAR model). Normalized activity concentration by species ranged from 1.1 x 10(-4) to 2.3 x 10(-2) (m(2) kg(-1), fresh weight). As reported in previous studies, the mycorrhizal species tended to have higher radiocesium concentrations. Some saprophytic species (e.g. Pholiota lubrica) also had high concentrations. For the mushroom species that were also evaluated in the post-Chernobyl studies, we found that the same species had similar trends of absorption capacities. Our results indicate the extensive analysis of public monitoring data is helpful to understand the situation of mushroom contamination and evaluate the internal dose by ingestion of wild mushrooms according to species and areas. (C) 2019 Elsevier Ltd. All rights reserved.