半个多世纪以来,瑞典沿海海藻类中的放射性核酸
Sören Mattsson1, Kristina Eriksson Stenström2, Guillaume Pédehontaa-Hiaa1
1Medical Radiation Physics Malmö, Department of Translational Medicine, Lund University, Skåne University Hospital Malmö, Inga Marie Nilssons gata 47, Malmö SE-205 02, Sweden.
Radiation protection dosimetry
|August 28, 2025
概括
海藻 (Fucus spp.) 的长期监测 显示了瑞典海岸线上的放射性核酸水平的变化. 分析显示-137和的含量正在减少,但-129和-236的含量正在增加,这凸显了核活动对环境的持续影响.
科学领域:
- 环境放射性监测
- 海洋生态与污染
- 核科学与技术
背景情况:
- 自1967年以来,Särdal地区的Fucus serratus和Fucus vesiculosus持续监测提供了长期数据集.
- 2020年在瑞典海岸进行了扩大采样,目的是将区域放射性核酸水平与历史数据进行比较.
- 了解海洋生态系统中的放射性核酸分布对于评估环境健康和潜在风险至关重要.
研究的目的:
- 报告Fucus spp中的各种放射性核素的时间变化和空间分布. 在瑞典海岸沿线.
- 将观察到的放射性核酸度与已知的排放源相关联,包括核设施和历史的辐射.
- 建立未来环境监测和风险评估的基线数据.
主要方法:
- 定期采集Fucus spp. 来自多个沿海地区的样本.
- 使用马光谱,低背景β测量,α光谱和加速器质谱分析放射性核素度.
- 放射性核素数据与核再加工厂 (塞拉菲尔德,海牙),核电厂 (林哈尔斯,巴塞贝克) 和切尔诺贝利辐射的排放相关性分析.
主要成果:
- 时间序列数据显示,近几十年来137Cs,99Tc和239+240Pu的度正在下降.
- 已观察到129I和236U的水平上升,表明持续或累积的来源.
- 14C分析表明人类输入超出了20世纪中叶的大气核武器测试.
结论:
- 在Fucus spp中的放射性核酸度 显示多个来源的显著时间和空间变化.
- 观察到的特定放射性核酸的趋势 (例如,增加129I,236U) 需要继续监测和调查.
- 确定的背景数据对于评估未来放射性核素释放到海洋环境的影响至关重要.
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