Radiocaesium transfer and radiation exposure of frogs in Fukushima Prefecture
Radiocaesium transfer and radiation exposure of frogs in Fukushima Prefecture
复制标题
福岛县青蛙放射性铯转移和辐射暴露
作者：
K. Tagami;S. Uchida;M. Wood;N. Beresford
国际放射防护委员会提出了一个环境评估框架。这包括对青蛙不同生命阶段的电离辐射暴露评估，但无法获得放射性铯转移参数。我们整理了福岛县(被福岛事故污染)的数据，并估计了蝌蚪和成年青蛙的放射性铯浓缩率(CRwo-water)值，提供了现有最大的两栖类CRwo-water数据集。在62个和59个复合样本中，总共分析了513只成年青蛙和2540只蝌蚪。结果表明，在事故发生一年后，水和两栖动物放射性铯的活度浓度达到了平衡。放射性铯向蝌蚪的转移高于对成蛙的转移。对水生和陆地环境中不同生命阶段和物种的剂量率进行了估计。估计对成虫和蝌蚪的剂量率通常是相似的，因为这两种生物的外部暴露占主导地位；青蛙产卵的剂量率估计比其他生命阶段低一个数量级。对于被评估的两个地点，它们不在福岛县污染最严重的地区，估计的剂量率低于预期的对野生动物种群构成风险的剂量率；污染较严重地区的剂量率很可能超过了一些影响基准值。
The International Commission on Radiological Protection has proposed an environmental assessment framework. This includes ionising radiation exposure assessment for different frog life-stages, but radiocaesium transfer parameters are unavailable. We collate data from the Fukushima Prefecture (contaminated by the Fukushima accident) and estimate radiocaesium concentration ratio (CRwo-water) values for tadpoles and adult frogs, presenting the largest available amphibian CRwo-water dataset. In total, 513 adult frogs and 2540 tadpoles were analysed in 62 and 59 composite samples respectively. Results suggest that equilibrium was reached between water and amphibian radiocaesium activity concentrations circa one-year after the accident. Radiocaesium transfer to tadpoles was higher than to adult frogs. Dose rates were estimated for different life-stages and species in both the aquatic and terrestrial environment. Estimated dose rates to adults and tadpoles were typically similar because external exposure dominated for both organisms; frogspawn dose rates were estimated to be orders of magnitude lower than other life-stages. For the two sites assessed, which were outside of the most contaminated areas of the Fukushima Prefecture, estimated dose rates were below those anticipated to present a risk to wildlife populations; it is likely that dose rates in more contaminated areas were in excess of some effects benchmark values.
影响因子：
2.3
作者：
Brown, J. E.;Alfonso, B.;Hosseini, A.
通讯作者：
Hosseini, A.