辐射防护通讯 ›› 2026, Vol. 46 ›› Issue (3): 1-6.

• 研究通报 • 上一篇    下一篇

福州大气气溶胶中7Be放射性活度浓度监测与分析

林晓东1, 钟圣鸿2, 林武辉2, 赵一鸣2, 王一潼3, 张彩虹1   

  1. 1.福建省辐射环境监督站,福州 350013;
    2.集美大学港口与海岸工程学院 极地与海洋研究院,福建 厦门 361021;
    3.广西大学海洋学院,南宁 530004
  • 收稿日期:2025-11-25 出版日期:2026-06-20 发布日期:2026-07-01
  • 通讯作者: 钟圣鸿。E-mail:2662303180@qq.com
  • 作者简介:林晓东(1983—),男,2006年毕业于重庆大学城市建设与环境工程学院环境工程专业,2009年毕业于重庆大学环境工程专业,获硕士学位,高级工程师。E-mail:183015215@qq.com
  • 基金资助:
    福建省环保科技计划项目“典型海洋生物中关键放射性核素富集特征与辐射安全评估”(2025R004);广西自然科学基金面上项目“粤桂地区滨海核电站周边大气γ剂量率变异机制与跨省输运研究”(2023JJA150133)。

Distribution characteristics and radiation assessment of 7Be in Fuzhou′s airborne particulates

LIN Xiaodong1, ZHONG Shenghong2, LIN Wuhui2, ZHAO Yiming2, WANG Yitong3, ZHANG Caihong1   

  1. 1. Fujian Radiation Environment Supervision Station, Fuzhou 350013;
    2. College of Harbour and Coastal Engineering, Polar Research Institute, Jimei University, Fujian, Xiamen 361021;
    3. School of Marine Sciences, Guangxi University, Nanning 530004
  • Received:2025-11-25 Online:2026-06-20 Published:2026-07-01

摘要: 7Be作为重要的宇宙成因放射性核素及天然放射性示踪核素,在大气输运、颗粒物沉降及辐射环境评价中具有独特价值。根据2021—2023年对福州市区与连江县开展气溶胶采样分析的结果显示,福州市区和连江县气溶胶中7Be平均活度浓度分别为3.95 mBq/m3与3.92 mBq/m3,具有良好的区域一致性,且均呈现显著的“春高夏低”季节特征,春季活度浓度分别为夏季的3.88倍与2.73倍,主要原因是春季大气平流层底部的空气会更多下沉进入对流层,从而将平流层中高浓度的7Be带到地表(“春季泄漏”效应),其与夏季降水清除作用共同调控季节特征。为区域大气过程示踪与辐射环境评价提供了基础数据,未来可结合气象要素进一步解析其传输机制。

关键词: 气溶胶, 7Be, 活度浓度, 吸收剂量, 福州市

Abstract: 7Be is an important cosmogenic radionuclide and natural radioactive tracer. It holds unique value in studies of atmospheric transport, particle deposition, and radiation environment assessment. Currently, comprehensive comparative studies on atmospheric 7Be in southeastern coastal cities and surrounding counties of China remain scarce.Based on aerosol sampling from 2021 to 2023 in Fuzhou urban area and Lianjiang County, the average activity concentrations of 7Be were 3.95 mBq/m3 and 3.92 mBq/m3, respectively. This indicates good regional consistency. Both sites showed a clear seasonal pattern, with higher values in spring and lower in summer. Specifically, the spring concentrations were 3.88 times (Fuzhou) and 2.73 times (Lianjiang) those in summer. The primary reason is increased downward transport of stratospheric air into the troposphere in spring (Springtime stratospheric intrusion), bringing high-level 7Be to the surface. This process, together with summer precipitation scavenging, co-controls the observed seasonal characteristics.These findings provide baseline data for tracing regional atmospheric processes and assessing the radiation environment. Future work can combine meteorological factors to further elucidate the transport mechanisms.

Key words: Aerosol, 7Be, Activity concentration, Absorbed dose, Fuzhou City

中图分类号: 

  • X831;TL75