Abstract:
:In this study, we investigated the concentrations of Fukushima nuclear power plant accident (FNPPA)-derived radiocesium (134Cs, 137Cs) deposited in the topsoil of Jeju Island, Korea. We also evaluated the soil inventories of radionuclides and compared the concentrations deposited by rainwater and fallout. We present the first evidence of FNPPA-derived radionuclides directly entering the environment of Jeju Island. In the case of FNPPA-derived 134Cs in soil, only a trace amount was identified in the surface layer (1 cm depth), whereas 137Cs derived from past atmospheric deposition of nuclear testing were detected along with those derived from the nuclear power plant accident. The total measured radiocesium (134Cs + 137Cs) indicates that although the value obtained from soils was slightly lower, both values were within the same order of magnitude. Of the FNPPA-derived radiocesium deposited in the soil, the impact from April 2011 was the largest at most sampling sites indicating that the radioactive plume directly covered Jeju Island. Furthermore, a variety of long- and short-lived gamma-emitting radionuclides were detected in the rainwater samples collected on April 7, 2011. Among them, short-lived radionuclides such as 140La, 110mAg, 95Nb, 125Sb, 113Sn, 129Te, 129mTe, 132Te, 132I, and 136Cs, were observed. The findings of this study provide evidence for the direct effects of FNPPA-derived radionuclides in Jeju Island. This is the first location in Korea and the first in the entire East Asian region, excluding Japan that is confirmed to have been directly affected FNPP accident.
journal_name
Chemospherejournal_title
Chemosphereauthors
Kang TW,Han YU,Na EH,Koo BJ,Park WPdoi
10.1016/j.chemosphere.2020.128457subject
Has Abstractpub_date
2021-02-01 00:00:00pages
128457issue
Pt 1eissn
0045-6535issn
1879-1298pii
S0045-6535(20)32652-7journal_volume
264pub_type
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