Department of Integrated Biosciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba, Japan.
PLoS One. 2012;7(4):e34766. doi: 10.1371/journal.pone.0034766. Epub 2012 Apr 4.
In response to contamination from the recent Fukushima nuclear accident, we conducted radionuclide analysis on bamboos sampled from six sites within a 25 to 980 km radius of the Fukushima Daiichi nuclear power plant. Maximum activity concentrations of radiocesium (134)Cs and (137)Cs in samples from Fukushima city, 65 km away from the Fukushima Daiichi plant, were in excess of 71 and 79 kBq/kg, dry weight (DW), respectively. In Kashiwa city, 195 km away from the Fukushima Daiichi, the sample concentrations were in excess of 3.4 and 4.3 kBq/kg DW, respectively. In Toyohashi city, 440 km away from the Fukushima Daiichi, the concentrations were below the measurable limits of up to 4.5 Bq/kg DW. In the radiocesium contaminated samples, the radiocesium activity was higher in mature and fallen leaves than in young leaves, branches and culms.
针对近期福岛核事故造成的污染，我们对福岛第一核电站半径 25 至 980 公里范围内的六个地点采集的竹子样本进行了放射性核素分析。距离福岛第一核电站 65 公里的福岛市样本中放射性铯（134）Cs 和（137）Cs 的最大活度浓度分别超过 71 和 79 kBq/kg，干重（DW）。在距离福岛第一核电站 195 公里的柏市，样本浓度分别超过 3.4 和 4.3 kBq/kg DW。在距离福岛第一核电站 440 公里的丰桥市，浓度低于可测量的上限，最高达 4.5 Bq/kg DW。在受放射性铯污染的样本中，成熟和落叶中的放射性铯活度高于幼叶、树枝和竹秆。
