Abstract
With a history of more than 200 years of tin mining, Bangka Island has brought along a byproduct of heavy minerals containing radionuclide elements. There are some concerns about this byproduct material contributing to natural radiation in the environment. In this study, a car-borne survey was conducted to accurately assess natural background radiation in Bangka Island. Indoor and outdoor ambient dose rates in 146 houses were also measured to assess the radiation dose from external exposure received by the public. Soil samples were collected and measured using a gamma spectroscopy system to evaluate the contributions of specific radionuclides to external terrestrial exposure. From 3790 measurement points during the car-borne survey, the highest ambient dose equivalent rate was 596 nSv h−1 measured in Muntok area, with a mean value of 101 nSv h−1 and a median value of 95 nSv h−1. The ambient dose equivalent rate distribution map showed a relatively higher value in the northern coastal area of the island, where the Pemali tin deposit is located. The annual effective dose received from external radiation in the 146 houses in Bangka Island ranged from 0.44 to 1.30 mSv year−1, with a median value of 0.66 mSv year−1. The soil contained a relatively high amount of thorium (232Th), which contributed 69% to external radiation exposure in Bangka Island.
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Acknowledgements
The authors acknowledge and are grateful to the author’s colleague from Bangka Island for the help during the investigation in study area.
Funding
This work was partially supported by the Japan Society for the Promotion of Science (JSPS) Environmental Radioactivity Network Center (ERAN) Grant No I-22–14, No I-23–25, No I-23–26 (25/III.2.7/HK/2022) (E.D.N), The Japan Society for the Promotion of Science (JSPS) KAKENHI Grant no. JP16K15368, JP16H02667, JP18KK0261, JP18K10023, JP20H00556 (S.T, M.H), the Hirosaki University Institutional Research Grant Health Research foundation (S.T; E.D.N; M.S), IREM-Hirosaki University (26/III.2.7/HK/2022) (E.D.N), Ministry of Research, Technology and Higher Education Indonesia and the Indonesia Endowment Funds for Education (LPDP) through the research fund Riset Inovasi untuk Indonesia Maju (RIIM) Grant No RIIM-16 (E.D.N). The Management Talenta-BRIN though the visiting researcher program 2022 (E.D.N; S.T; and Y.O).
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Conceptualization, E.D.N, and S.T.; methodology, E.D.N., M.H., and Y.O.; validation, R.P, and E.D.N.; formal analysis, E.D.N., and R.P; investigation, R.P., S.N.S, W., M.W., S.Y., H.N.E.S., S.W, D.I., U., A.D., H.P., I.D.W and E.D.N; resources, E.D.N, W, S.W., M.S, M.W and S.T.; data curation, E.D.N, R.P., W. and; writing—original draft preparation, R.P, and E.D.N; writing—review and editing, R.P., E.D.N., W, M.W., S.Y., H.N.E.S., S.N.S., C.K., A.D., H.P., I.D.W., E.E., N.N., D.I., G.S., M., E.H., S.W., M.H., Y.O., M.S., and S.T.; visualization, E.D.N.; supervision, E.D.N, M.H and S.T.; funding acquisition, M.S., E.D.N and S.T. All authors have read and agreed to the published version of the manuscript.
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Pradana, R., Nugraha, E.D., Wahyudi, W. et al. Car-borne survey and dose assessment from external radiation exposure in Bangka Island. Environ Sci Pollut Res 30, 89280–89292 (2023). https://doi.org/10.1007/s11356-023-28640-4
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DOI: https://doi.org/10.1007/s11356-023-28640-4