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首页> 外文期刊>Environmental Science & Technology >Sulfate Aerosol as a Potential Transport Medium of Radiocesium from the Fukushima Nuclear Accident
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Sulfate Aerosol as a Potential Transport Medium of Radiocesium from the Fukushima Nuclear Accident

机译：硫酸盐气溶胶是福岛核事故中放射性铯的潜在运输媒介

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摘要

To date, areas contaminated by radionuclides discharged from the Fukushima Dai-ichi nuclear power plant accident have been mapped in detail. However, size of the radionuclides and their mixing state with other aerosol components, which are critical in their removal from the atmosphere, have not yet been revealed. We measured activity size distributions of ~(134)Cs and ~(137)Cs in aerosols collected 47 days after the accident at Tsukuba, Japan, and found that the activity median aerodynamic diameters of ~(134)Cs and ~(137)Cs in the first sample (April 28-May 12) were 0.54 and 0.53 μm, respectively, and those in the second sample (May 12-26) were both 0.63 μm. The activity size distributions of these radiocesium were within the accumulation mode size range and almost overlapped with the mass size distribution of non-sea-salt sulfate aerosol. From the analysis of other aerosol components, we found that sulfate was the potential transport medium for these radionuclides, and resuspended soil particles that attached radionuclides were not the major airborne radioactive substances at the time of measurement This explains the relatively similar activity sizes of radiocesium measured at various sites during the Chernobyl accident Our results can serve as basic data for modeling the transport/deposition of radionuclides.
机译：迄今为止，已经详细绘制了福岛第一核电站事故排放的放射性核素污染的区域。但是，放射性核素的大小及其与其他气溶胶成分的混合状态（对于将其从大气中去除至关重要）尚未被揭示。我们测量了日本筑波事故发生后47天收集的气溶胶中〜（134）Cs和〜（137）Cs的活动大小分布，发现〜（134）Cs和〜（137）Cs的活动中值空气动力学直径第一个样品（4月28日至5月12日）中的样品分别为0.54和0.53μm，第二个样品（5月12日至26日）中的样品均为0.63μm。这些放射性铯的活性尺寸分布在累积模式尺寸范围内，并且与非海盐硫酸盐气溶胶的质量尺寸分布几乎重叠。通过对其他气溶胶成分的分析，我们发现硫酸盐是这些放射性核素的潜在传输介质，而附着放射性核素的重悬土壤颗粒在测量时并不是主要的空气传播放射性物质。这解释了所测放射性铯的活性大小相对相似切尔诺贝利事故期间在各个地点的分布我们的结果可作为模拟放射性核素运输/沉积的基础数据。

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  • 来源
    《Environmental Science & Technology》 |2012年第11期|p.5720-5726|共7页
  • 作者

    Naoki Kaneyasu; Hideo Ohashi; Fumie Suzuki; Tomoaki Okuda; Fumikazu Ikemori;

  • 作者单位

    National Institute of Advanced Industrial Science and Technology, 16-1 Onogawa, Tsukuba 305-8569, Japan;

    Tokyo University of Marine Science and Technology, 4-5-7 Kounan, Minato-ku, Tokyo 108-8477, Japan;

    Tokyo University of Marine Science and Technology, 4-5-7 Kounan, Minato-ku, Tokyo 108-8477, Japan;

    Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan;

    Nagoya City Institute for Environmental Sciences, 5-16-8 Toyoda, Nagoya 457-0841, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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