School of Marine Sciences, Guangxi University, Nanning 530004, China; Guangxi Laboratory on the study of Coral Reefs in the South China Sea, Nanning 530004, China; Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology, Guangxi Normal University, Guilin 541004, China.
School of Marine Sciences, Guangxi University, Nanning 530004, China.
Mar Pollut Bull. 2022 Mar;176:113476. doi: 10.1016/j.marpolbul.2022.113476. Epub 2022 Feb 28.
Historical Sr activity in seawater was established in the China seas from 1963 to 2018. Based on the exponential decrease in Sr activity in seawater, the effective half-life (EHL) of Sr was quantified to be 11.5 ± 1.6 a, 16.5 ± 2.4 a, 27.2 ± 6.2 a, and 26.7 ± 4.3 a in the Bohai Sea, Yellow Sea, East China Sea, and South China Sea, respectively. We found contrasting patterns in the EHL of Sr and Cs in the marginal seas and open oceans that were closely related to the subtly different pathways of Sr and Cs in marine environment. Additionally, we demonstrated that Fukushima-derived Sr (<0.01 Bq/m) would be difficult to identify in the China seas. Our study not only provided the key parameter of the EHL in marine models for predicting the Sr activity in the China seas in the post-Fukushima era but also enhanced our understanding of Sr behavior and its fate in marine environments.
自 1963 年至 2018 年，在中国海域建立了海水 Sr 历史活度记录。基于海水 Sr 活度的指数衰减，定量得出 Sr 的有效半衰期（EHL）分别为渤海、黄海、东海和南海的 11.5±1.6 a、16.5±2.4 a、27.2±6.2 a 和 26.7±4.3 a。我们发现边缘海和开阔大洋中 Sr 和 Cs 的 EHL 呈现出相反的模式，这与 Sr 和 Cs 在海洋环境中微妙不同的途径密切相关。此外，我们还证明了在海洋中难以识别福岛氚（<0.01 Bq/m）Sr 的存在。本研究不仅为预测福岛后时代中国海域 Sr 活度的海洋模型提供了 EHL 的关键参数，而且增强了我们对 Sr 在海洋环境中的行为及其归宿的认识。
