Sezgin Naim, Cumali Bilge Ozdogan, Aysal Namik, Kajjumba George William, Nemlioglu Semih
Faculty of Engineering, Department of Environmental Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey.
Faculty of Engineering, Department of Geology Engineering, Istanbul University-Cerrahpasa, Istanbul, Turkey.
Int J Environ Health Res. 2023 Dec;33(12):1443-1455. doi: 10.1080/09603123.2022.2098259. Epub 2022 Jul 6.
Radionuclides Ra, Th, and K can be found in various concentrations in the surface soil. High concentrations of radionuclides in the surface soil may cause radiological risks. This study investigated natural radioactivity levels and artificial radionuclide (Cs) levels in the Istanbul University-Cerrahpasa, Avcilar region, Istanbul, Turkey. Radioactivity concentrations were analyzed using the gamma-ray spectrometer. The mean activity concentration of Ra, Th, K, and Cs is 28.55, 29.57, 385.72, and 3.09 Bq kg, respectively. Radiological parameters radium equivalent activity, absorbed dose rate, annual effective dose equivalent, external hazard index, and excess lifetime cancer risk were calculated using activity concentrations. The radiological parameters values were lower than UNSCEAR values, except for the annual gonadal dose equivalent (approximately 10% higher). There is a strong correlation between radiological parameters and radionuclides. Generally, the activities of radionuclides in the region fall within the recommended limits, thus Istanbul-Avcilar region can be considered safe for settlement.
在表层土壤中可以发现镭（Ra）、钍（Th）和钾（K）等放射性核素，其浓度各不相同。表层土壤中高浓度的放射性核素可能会导致辐射风险。本研究调查了土耳其伊斯坦布尔阿夫cılar区伊斯坦布尔大学-塞拉哈帕şa分校的天然放射性水平和人工放射性核素（铯）水平。使用伽马射线光谱仪分析了放射性浓度。镭、钍、钾和铯的平均活度浓度分别为28.55、29.57、385.72和3.09贝可勒尔/千克。利用活度浓度计算了镭当量活度、吸收剂量率、年有效剂量当量、外照射危害指数和超额终生癌症风险等辐射参数。除年性腺剂量当量（约高10%）外，辐射参数值均低于联合国原子辐射效应科学委员会（UNSCEAR）的值。辐射参数与放射性核素之间存在很强的相关性。一般来说，该地区放射性核素的活度在推荐限值范围内，因此伊斯坦布尔-阿夫cılar地区可被认为适合居住。
