Nadhiya Aishath, Khandaker Mayeen Uddin, Mahmud Sultan, Yarima Mudassir Hassan
Department of Physics, University of Malaya, Kuala Lumpur, Malaysia.
Center for Biomedical Physics, School of Healthcare and Medical Sciences, Sunway University, Selangor, Malaysia.
Radiat Prot Dosimetry. 2019 Oct 1;184(3-4):302-306. doi: 10.1093/rpd/ncz085.
Recognising the consumption of tuna fish as a major foodstuff in Maldivian diet, the presence of naturally occurring radionuclides in Yellowfin and Skipjack tuna are determined by using HPGe gamma-ray spectrometry to evaluate the health hazards to Maldivians. The samples were collected from different atolls of Maldives adjacent to the coastal waters of Indian Ocean. The activity concentrations (Bq kg-1) in Yellowfin tuna for 226Ra, 232Th and 40K are in the ranges of 4.2 ± 1.8-10.5 ± 1.1, 1.3 ± 0.3-3.2 ± 0.7 and 589 ± 29-697 ± 34, respectively while in Skipjack tuna the respective ranges are 3.9 ± 0.5-13.2 ± 1.1, 1.3 ± 0.3-2.7 ± 0.6 and 511 ± 28-681 ± 35. The committed effective dose (mean 263 μSv y-1) received by an individual due to the dietary intake of Yellowfin tuna falling below the UNSCEAR referenced global internal dose limit of 290 μSv y-1; while for Skipjack tuna, the estimated dose (mean 365 μSv y-1) exceeds the world average limiting value. The carcinogenic risk was found to be well below the ICRP referenced acceptable limit of 2.5 × 10-3. The present study indicates that the radiation dose to Maldivian via the consumption of Yellowfin tuna poses an insignificant threat to the public health. However, prolonged consumption of Skipjack tuna fish from the studied areas may pose a cumulative risk to the public health.
鉴于金枪鱼是马尔代夫饮食中的主要食物，通过使用高纯锗γ射线光谱法测定黄鳍金枪鱼和鲣鱼中天然存在的放射性核素，以评估其对马尔代夫居民的健康危害。样本采集自马尔代夫靠近印度洋沿海水域的不同环礁。黄鳍金枪鱼中镭-226、钍-232和钾-40的活度浓度（贝可勒尔/千克）分别在4.2±1.8至10.5±1.1、1.3±0.3至3.2±0.7以及589±29至697±34的范围内，而鲣鱼中的相应范围分别为3.9±0.5至13.2±1.1、1.3±0.3至2.7±0.6以及511±28至681±35。因食用黄鳍金枪鱼导致个体摄入的待积有效剂量（平均263微希沃特/年）低于联合国原子辐射效应科学委员会参考的全球内部剂量限值290微希沃特/年；而对于鲣鱼，估计剂量（平均365微希沃特/年）超过了世界平均限值。致癌风险被发现远低于国际辐射防护委员会参考的可接受限值2.5×10⁻³。本研究表明，通过食用黄鳍金枪鱼对马尔代夫居民造成的辐射剂量对公众健康构成的威胁微不足道。然而，长期食用研究区域的鲣鱼可能会对公众健康构成累积风险。
