Investigation on the radioactivity levels of seawater, sediments, and biota in Daya Bay, China

作者：Fan Cui, Honghui Huang, Yi Shen, Zhan Tan, Pengxiang Qu, Ming Dai, Hongwei Yu, Weixu Huang, Zixiang Wu, Huifeng Chen, Weizhen Guo, Yuxin Jia, Yanbing Liu · 发表于：Radiation Medicine and Protection · 年份：2023 · DOI：10.1016/j.radmp.2023.07.004 · 被引用次数：8 · 研究领域：Radioactivity and Radon Measurements、Radioactive contamination and transfer、Nuclear and radioactivity studies

To investigate the radioactivity levels of seawater, sediments, and biota in the Daya Bay sea area, China, in order to establish the radioactivity baseline values, and provide basic data for the assessment of potential radiological risks that might result from the application of nuclear technology or human activities. Samples of seawater, sediments, and biota were collected from the Daya Bay sea area and analyzed. Their radioactivity baseline data were then compared with information from other regions in China and around the world reported in related literature. For the seawater samples, the activity concentrations of natural radionuclide 40K were 9.9–10.4 Bq/L, while 238U, 226Ra, 210Pb, 137Cs, and 110Agm were below the minimum detectable activity (MDA). Regarding the sediment samples, the activity concentrations of 238U, 228Ra, 226Ra, 210Pb, 40K, and 137Cs were 38.1–40.4, 49.1−53.7, 32.6−38.6, 59−95, 590−650, and 0.48–0.88 Bq/(kg dry weight), respectively, while 110Agm was below the MDA. For the marine shrimps in the biota samples, the activity concentrations of 228Ra, 226Ra, 40K, and 137Cs were 1.14–2.75, 0.17−0.43, 63–76, and 0.038–0.045 Bq/kg, respectively, while 238U, 210Pb, and 110Agm were all below the MDA. Furthermore, for the marine fishes in the biota samples, the activity concentrations of 228Ra, 226Ra, 210Pb, 40K, and 137Cs were 2.13–19.7, 0.32–3.78, <2.2–2.76, 59–70, and <0.0071–0.026 Bq/(kg wet weight), respectively, while 110Agm was all below the MDA. 228Ra was...