Central Laboratory, Marine Ecology Research Institute, 300 Iwawada, Onjuku-machi, Isumi-gun, Chiba 299-5105, Japan.
Central Laboratory, Marine Ecology Research Institute, 300 Iwawada, Onjuku-machi, Isumi-gun, Chiba 299-5105, Japan.
Mar Pollut Bull. 2020 Dec;161(Pt B):111775. doi: 10.1016/j.marpolbul.2020.111775. Epub 2020 Oct 23.
Concentrations of I and I in kelps (Saccharina) collected from coastal waters off northern Japan were monitored from 2007 to 2019. During the 2007-2008 test operation of the Rokkasho nuclear fuel reprocessing plant, I discharge from the plant increased, and the I concentration and I/I atom ratio in the kelps reached maxima of 42 μBq/g-dry and 264 × 10, respectively. By 2009, both had decreased by one order of magnitude. After the Fukushima Dai-ichi Nuclear Power Plant accident in 2011, the I concentration and I/I atom ratio in the kelps increased to 2.24 μBq/g-dry and 11.6 × 10, respectively. After 2012, the ratio in kelps decreased to (2.1-8.9) × 10, which is almost the same as the seawater value off Aomori Prefecture before the test operation. The I/I atom ratio in kelps thus represents the ambient seawater ratio during the growth period of the kelps.
2007 年至 2019 年，监测了日本北部沿海海域采集的海带（巨藻属）中碘和碘的浓度。在 2007-2008 年罗卡什核燃料再处理厂的测试运行期间，工厂排放的碘增加，海带中的碘浓度和碘/碘原子比达到了 42 μBq/g-干和 264×10 的最大值，分别。到 2009 年，两者都减少了一个数量级。2011 年福岛第一核电站事故后，海带中的碘浓度和碘/碘原子比分别增加到 2.24 μBq/g-干和 11.6×10。2012 年后，海带中的比值下降到（2.1-8.9）×10，几乎与测试运行前青森县海域的海水值相同。因此，海带中的碘/碘原子比代表了海带生长期间的环境海水比值。
