Abdalbasit Yasmine, Salahel Din Khaled, Abbady Abdelbaset, Saad Nagwa
Physics Department, Faculty of Science, South Valley University, Qena, 83523, Egypt.
Faculty of Computer and Information, South Valley University, Qena, 83523, Egypt.
Sci Rep. 2025 Jan 28;15(1):3584. doi: 10.1038/s41598-025-86291-6.
Ra, Th, and K levels in various foods frequently consumed by Egyptians were determined using a gamma-ray spectrometer based on the germanium detector (HPGe). Activity concentrations of Ra, Th, and K were in the range of < 0.10 to 0.79 ± 0.07, < 0.09 to 0.42 ± 0.04, and < 1.96 to 89.73 ± 2.96 Bq/kg, respectively. The gastrointestinal tract (GIT) model was employed to estimate the effective doses received by the different parts of the adult's gastrointestinal tract, i.e., stomach (ST), small intestine (SI), upper large intestine (ULI), and lower large intestine (LLI), due to the ingestion of the analyzed foods. This estimation was based on mathematical calculations of the energy absorbed by organs due to transformations of ingested radionuclides. The effective doses (μSv/y) received by each compartment were 8.86 (ST), 8.76 (SI), 66.90 (ULI), and 176.76 (LLI). The results do not exceed the safe thresholds set by global organizations UNSCEAR and WHO, 290 and 250-400 μSv/y, respectively. Therefore, radionuclide intakes due to investigated food consumption do not pose any significant radiological impact.
使用基于锗探测器（HPGe）的伽马射线光谱仪测定了埃及人经常食用的各种食物中的镭、钍和钾含量。镭、钍和钾的活度浓度分别在<0.10至0.79±0.07、<0.09至0.42±0.04以及<1.96至89.73±2.96 Bq/kg范围内。采用胃肠道（GIT）模型来估算成年人胃肠道不同部位，即胃（ST）、小肠（SI）、上大肠（ULI）和下大肠（LLI），因摄入所分析食物而接受的有效剂量。该估算基于摄入的放射性核素衰变时器官吸收能量的数学计算。每个部分接受的有效剂量（μSv/y）分别为8.86（胃）、8.76（小肠）、66.90（上大肠）和176.76（下大肠）。结果未超过全球组织联合国原子辐射效应科学委员会（UNSCEAR）和世界卫生组织（WHO）分别设定的安全阈值，即290和250 - 400 μSv/y。因此，因食用所调查食物而摄入的放射性核素不会造成任何显著的辐射影响。
