这项研究的目的是通过检查其地形来评估WadiElGemal岛的自然资源和放射性风险,矿物学,地球化学,和放射性分布。这个岛,位于埃及东南沙漠WadiElGemal的出口,具有独特的形状,类似于基于Landsat图像的海豚。它是WadiElGemal-Hamata保护区的一部分,以其多样化的环境而著称,地质,经济,和考古特征,包括最近的珊瑚礁,沙质沉积物,第四纪碳酸盐沉积物,还有红树林.岛上的主要自然资源是动物,红树林,还有Flora.从岛上收集的样品使用NaI检测器进行分析,以测量放射性核素的浓度,例如238U,232Th,226Ra,40K,根据UNSCAR指南,被发现在可接受的水平内。放射性核素238U,232Th,226Ra,采集样品的40K活性浓度分别为32.55±9、12.63±4、12.49±4和325±34Bq/kg,分别。关于放射性危害指数,吸收γ剂量率值(36.06±5.42nGy/h),镭当量活度(73.88±14.4Bq/kg),室内(0.18±0.03mSv/y)和室外(0.04±0.01mSv/y)的年有效剂量,内部(0.29±0.05)和外部(0.2±0.03)指数,和超额终生癌症指数(0.15±0.05×10-3)。这表明与这些沉积物没有重大风险。
The objective of this study is to assess the natural resources and radiological risks of Wadi El Gemal Island by examining its topography, mineralogy, geochemistry, and radioactive distributions. This island, which is situated at the outlet of Wadi El Gemal in Egypt\'s southeastern Desert, has a unique shape resembling a dolphin based on Landsat imagery. It\'s a part of the Wadi El Gemal-Hamata Protectorate and is notable for its diverse environmental, geological, economic, and archeological features, including recent reefs, sandy deposits, Quaternary carbonate sediments, and mangroves. The main natural resources on the island are fauna, mangrove forests, and flora. Samples collected from the island were analyzed using a NaI detector to measure the concentrations of radionuclides such as 238U, 232Th, 226Ra, and 40K, which were found to be within acceptable levels according to UNSCAR guidelines. The radionuclide 238U, 232Th, 226Ra, and 40K activity concentrations of the collected samples were 32.55 ± 9, 12.63 ± 4, 12.49 ± 4, and 325 ± 34 Bq/kg, respectively. Regarding radiological hazard indices, the values of absorbed gamma dose rate (36.06 ± 5.42 nGy/h), radium equivalent activity (73.88 ± 14.4 Bq/kg), annual effective dose indoor (0.18 ± 0.03 mSv/y) and outdoor (0.04 ± 0.01 mSv/y), internal (0.29 ± 0.05) and external (0.2 ± 0.03) indices, and excess lifetime cancer index (0.15 ± 0.05 × 10-3).This is suggest that there is no significant risk associated with these sediments.