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Natural radioactivity measurements and evaluation of radiological hazards in sediment of Aliağa Bay, İzmir (Turkey)

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Abstract

The activity concentration of natural 226Ra, 232Th, and 40K radionuclides was examined in some selected locations in Aliaga Bay of Izmir district, Turkey. Sediment samples from 30 locations were collected and analyzed for radionuclides activity concentration by gamma-ray spectrometry using a high-purity germanium HPGe gamma-ray detector. The activity concentrations of the sediment samples range from 23.5 ± 1.7 to 59.5 ± 1.6 Bq kg−1 for 226Ra, 37.5 ± 0.9 to 64.4 ± 0.6 Bq kg−1 for 232Th, and 354.7 ± 5.6 to 978.4 ± 5.8 Bq kg−1 for 40K. Based on the obtained results, the radiological parameters were evaluated. The mean values for absorbed dose rate, annual effective dose equivalent, radium equivalent activity, external hazard index, and excess lifetime cancer risk were determined and found as 81.64 nGy h−1, 100.13 μSv y−1, 173.31 Bq kg−1, 0.47, and 0.40, respectively. Calculated radiological parameters of sediment samples were compared with the World Standard Value. The results obtained in this study were found to be above the globally standard limit for most locations. Statistical data such as skewness and kurtosis were calculated, and frequency distribution, Pearson’s correlation analysis, box plot, factor analysis, and cluster analysis were applied in order to assess the distribution of radiological parameters and relationship between them.

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Acknowledgments

The authors are grateful to the Rector of Kirklareli University for his support. Use of facilities at the Central Research Laboratory of Kırklareli University for HPGe detector is acknowledged.

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  1. Faculty of Science and Literature, Department of Physics, Campus of Kayali, Kirklareli University, Kirklareli, Turkey

    Selin Özden & Serpil Aközcan

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  1. Selin Özden
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Correspondence to Selin Özden.

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Özden, S., Aközcan, S. Natural radioactivity measurements and evaluation of radiological hazards in sediment of Aliağa Bay, İzmir (Turkey). Arab J Geosci 14, 64 (2021). https://doi.org/10.1007/s12517-020-06446-9

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