Instituto Tecnológico e Nuclear, Departamento de Protecção Radiológica e Segurança Nuclear, E.N. 10, 2686-953 Sacavém, Portugal.
J Environ Radioact. 2011 May;102(5):473-8. doi: 10.1016/j.jenvrad.2011.03.004. Epub 2011 Apr 14.
Radionuclide analyses were performed in tissue samples including muscle, gonad, liver, mammary gland, and bone of marine mammals stranded on the Portuguese west coast during January-July 2006. Tissues were collected from seven dolphins (Delphinus delphis and Stenella coeruleoalba) and one pilot whale (Globicephala sp.). Samples were analyzed for (210)Po and (210)Pb by alpha spectrometry and for (137)Cs and (40)K by gamma spectrometry. Po-210 concentrations in common dolphin's muscle (D. delphis) averaged 56 ± 32 Bq kg(-1) wet weight (w.w.), while (210)Pb averaged 0.17 ± 0.07 Bq kg(-1) w.w., (137)Cs averaged 0.29 ± 0.28 Bq kg(-1) w.w., and (40)K 129 ± 48 Bq kg(-1) w.w. Absorbed radiation doses due to these radionuclides for the internal organs of common dolphins were computed and attained a 1.50 μGy h(-1) on a whole body basis. (210)Po was the main contributor to the weighted absorbed dose, accounting for 97% of the dose from internally accumulated radionuclides. These computed radiation doses in dolphins are compared to radiation doses from (210)Po and other radionuclides reported for human tissues. Due to the high (210)Po activity concentration in dolphins, the internal radiation dose in these marine mammals is about three orders of magnitude higher than in man.
对 2006 年 1 月至 7 月期间在葡萄牙西海岸搁浅的海洋哺乳动物（海豚、鼠海豚）的肌肉、性腺、肝脏、乳腺和骨骼等组织样本进行了放射性核素分析。从 7 只海豚（宽吻海豚和白腰斑纹海豚）和 1 只领航鲸（巨头鲸）中采集了组织样本。用α谱法分析了（210）Po 和（210）Pb，用γ谱法分析了（137）Cs 和（40）K。普通海豚肌肉中的 Po-210 浓度平均值为 56 ± 32 Bq kg(-1) 湿重（w.w.），（210）Pb 平均值为 0.17 ± 0.07 Bq kg(-1) w.w.，（137）Cs 平均值为 0.29 ± 0.28 Bq kg(-1) w.w.，（40）K 平均值为 129 ± 48 Bq kg(-1) w.w.。普通海豚内部器官吸收的这些放射性核素的辐射剂量被计算出来，全身平均为 1.50 μGy h(-1)。（210）Po 是加权吸收剂量的主要贡献者，占内部积累放射性核素剂量的 97%。将这些海豚的计算辐射剂量与人类组织中报告的（210）Po 和其他放射性核素的辐射剂量进行了比较。由于海豚中（210）Po 的活度浓度较高，这些海洋哺乳动物的内部辐射剂量比人类高约三个数量级。
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