Radioactivity concentrations of natural radionuclides in fine dust of Jeju, Korea

Han Chung-Hun; HanChung-Hun; Lim Sohyeon; LimSohyeon; Im Hee-Jung; ImHee-Jung

doi:10.5806/ast.2023.36.4.191

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.36, No.4

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Radioactivity concentrations of natural radionuclides in fine dust of Jeju, Korea

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

2023, v.36 no.4, pp.191-197

https://doi.org/10.5806/ast.2023.36.4.191

Chung-Hun Han (Department of Chemistry, Jeju National University, Institute for Nuclear Science and Technology, Jeju National University)
Sohyeon Lim (Department of Chemistry, Jeju National University)
Hee-Jung Im (Department of Chemistry, Jeju National University)

Han, C., Lim, S., & Im, H. (2023). Radioactivity concentrations of natural radionuclides in fine dust of Jeju, Korea. , 36(4), 191-197, https://doi.org/10.5806/ast.2023.36.4.191

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Abstract

Radioactivity concentrations for natural radionuclides were determined from fine dust samples collected in Jeju, Korea according to atmospheric events (Asian dust, haze, fog-mist, and non-event), and radium equivalent activity was calculated. The mean atmospheric radioactivity concentrations for ²³⁸U, ²³²Th, and ⁴⁰K in 127 fine dust samples were 0.49, 0.24, and 7.23 µBq m^-3, respectively, and the radium equivalent activity was 33.25 Bq kg^-1. The mean concentrations of ²³⁸U and ²³²Th in the fine dust during the Asian dust period were 1.31 and 1.60 µBq m^-3, respectively, above the global average, while the values for the other three atmospheric events were lower. The ratio of ²³²Th/²³⁸U radioactivity during the Asian dust period was 1.22, higher than the ratio for the other three atmospheric events.