South China Sea Environment Monitoring Center, State Oceanic Administration (SOA), Guangzhou 510300, China.
South China Sea Testing and Appraisal Center, State Oceanic Administration (SOA), Guangzhou 510300, China.
Int J Environ Res Public Health. 2021 Aug 19;18(16):8767. doi: 10.3390/ijerph18168767.
In order to assess the radioactive level in the terrestrial and marine organisms in Yangjiang and the adjacent areas, Sr, gross beta and gamma-emitting radionuclides (U, Ra, Th, Ra, K, Cs, Cr, Fe, Mn, Co, Co and Zn) were analyzed from 2011 to 2012. The annual effective doses were estimated in the high natural radioactive background areas in Yangjiang (HBRAYJ). The specific activities of U, Th, Ra, K and Cs in all organisms were <0.05-5.20, 0.30-14.50, 0.11-3.58, 11.1-148.0 and <0.003-0.088 Bq/kg, whilst Cr, Fe, Mn, Co, Co, Zn and Ag were below the minimum detectable activity. Sr and gross beta specific activities were 20.0-143.0 and 0.021-0.316 Bq/kg. Results show that Th was significantly higher than U and Ra of natural U series in organisms due to the rich-Th soils in the HBRAYJ; Th, Ra, K, Cs and Sr were greatly lower than the limited concentrations in Chinese foods. The internal dose mainly contributes to natural K, Ra and Th. It is useful to provide some basic data and assess the radiological risk from the HBRAYJ and Yangjiang nuclear power plants in future.
为评估阳江及邻近地区陆地和海洋生物体内的放射性水平，本研究于 2011 年至 2012 年分析了 Sr、总β 和γ放射性核素（U、Ra、Th、Ra、K、Cs、Cr、Fe、Mn、Co、Ni 和 Zn）。在阳江高天然放射性本底地区（HBRAYJ）估算了年有效剂量。所有生物体内 U、Th、Ra、K 和 Cs 的比活度均<0.05-5.20、0.30-14.50、0.11-3.58、11.1-148.0 和<0.003-0.088 Bq/kg，而 Cr、Fe、Mn、Co、Ni、Zn 和 Ag 的比活度低于最低可探测活度。Sr 和总β 的比活度分别为 20.0-143.0 和 0.021-0.316 Bq/kg。结果表明，由于 HBRAYJ 土壤中富含 Th，生物体内天然 U 系中 Th 明显高于 U 和 Ra；Th、Ra、K、Cs 和 Sr 远低于中国食品中的限量浓度。内照射剂量主要来自天然 K、Ra 和 Th。本研究为未来评估 HBRAYJ 和阳江核电站的放射性风险提供了一些基础数据。
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