Novel Method of Quantifying Radioactive Cesium-Rich Microparticles (CsMPs) in the Environment from the Fukushima Daiichi Nuclear Power Plant
Novel Method of Quantifying Radioactive Cesium-Rich Microparticles (CsMPs) in the Environment from the Fukushima Daiichi Nuclear Power Plant
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DOI：
10.1021/acs.est.7b06693
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发表时间：
2018-06-05
影响因子：
11.4
通讯作者：
Utsunomiya, Satoshi
中科院分区：
文献类型：
--
作者：
Ikehara, Ryohei;Suetake, Mizuki;Utsunomiya, Satoshi
2011年3月，福岛第一核电站(FDNPP)在核灾难的早期阶段向周围环境释放了高放射性富铯微粒(CsMPs)；然而，释放的Csmps的数量仍未确定。在这里，我们报告了一种新的方法来量化福岛及其周围表层土壤中CsMPs的数量及其贡献的放射性比例，我们称之为CsMPs的量化(QCP)，该方法基于放射自显影。在此，光激励发光与各种微粒的放射性呈线性相关，回归系数为0.0523贝克勒尔/pSL/h(Bq/pSL/h)。在日本福岛长谷罗采集的土壤中，在114亩筛网的土壤中检出了Csmps。Csmps的放射性与吸附Cs的粘土颗粒之间没有重叠。根据CsMPs的放射性分布，确定了CsMPs的阈值放射性。
Highly radioactive cesium-rich microparticles (CsMPs) were released from the Fukushima Daiichi nuclear power plant (FDNPP) to the surrounding environment at an early stage of the nuclear disaster in March of 2011; however, the quantity of released CsMPs remains undetermined. Here, we report a novel method to quantify the number of CsMPs in surface soils at or around Fukushima and the fraction of radioactivity they contribute, which we call "quantification of CsMPs" (QCP) and is based on autoradiography. Here, photostimulated luminescence (PSL) is linearly correlated to the radioactivity of various microparticles, with a regression coefficient of 0.0523 becquerel/PSL/h (Bq/PSL/h). In soil collected from Nagadoro, Fukushima, Japan, CsMPs were detected in soil sieved with a 114 mu m mesh. There was no overlap between the radioactivities of CsMPs and clay particles adsorbing Cs. Based on the distribution of radioactivity of CsMPs, the threshold radioactivity of CsMPs in the size fraction of