Deposition of Fukushima nuclear power plant accident-derived radiocesium in the soils of Jeju Island, Korea, and evidence for long- and short-lived radionuclides in rainwater.

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

Chemosphere

journal_title

Chemosphere

authors

Kang TW,Han YU,Na EH,Koo BJ,Park WP

doi

10.1016/j.chemosphere.2020.128457

subject

Has Abstract

pub_date

2021-02-01 00:00:00

pages

128457

issue

Pt 1

eissn

0045-6535

issn

1879-1298

pii

S0045-6535(20)32652-7

journal_volume

264

pub_type

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