Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident

Naoki Kaneyasu, Hideo Ohashi, Fumie Suzuki, Tomoaki Okuda, Fumikazu Ikemori, Naofumi Akata, Toshihiro Kogure

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Most studies of the properties of airborne radionuclides emitted from the Fukushima Daiichi Nuclear Power Plant have focused on the relatively early stages of the accident, and little is known about the characteristics of radiocesium in the long-term. In this study, we analyzed activity size distributions of airborne radiocesium collected over 5 months in Tsukuba, Japan. Radiocesium in the accumulation mode size range (0.1–2 μm in aerodynamic diameter) was overwhelming in the early aerosol samples and decreased with time, while that associated with coarse aerosols remained airborne. We examined the radiocesium adsorbed onto airborne soil particles, and found that the size dependence of 137Cs surface density adsorbed on soil particles was weak. That is, radiocesium was distributed homogeneously throughout the aerodynamic diameter range of 2.1–11 μm. This characteristic may be related to the reported structure of radiocesium-bearing soil particles collected from the ground, which consisted of an aggregate of specific clay minerals and other non-cesium adsorbing particles. The resuspension factors for the first two aerosol samples collected during late April and May 2011 were close to those in European cities in the months following the Chernobyl accident, despite different soil and weather conditions.

Original languageEnglish
Pages (from-to)122-129
Number of pages8
JournalJournal of Environmental Radioactivity
Volume172
DOIs
Publication statusPublished - 2017 Jun 1

Fingerprint

Fukushima Nuclear Accident
nuclear accident
Accidents
Soil
Aerosols
Soils
aerosol
aerodynamics
Aerodynamics
Bearings (structural)
soil
Nuclear Power Plants
Chernobyl accident
Weather
nuclear power plant
Clay minerals
resuspension
Particle Size
Radioisotopes
range size

Keywords

  • Cs
  • Fukushima nuclear accident
  • Radionuclides
  • Resuspension
  • Soil dust particles
  • Surface density

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident. / Kaneyasu, Naoki; Ohashi, Hideo; Suzuki, Fumie; Okuda, Tomoaki; Ikemori, Fumikazu; Akata, Naofumi; Kogure, Toshihiro.

In: Journal of Environmental Radioactivity, Vol. 172, 01.06.2017, p. 122-129.

Research output: Contribution to journalArticle

Kaneyasu, Naoki ; Ohashi, Hideo ; Suzuki, Fumie ; Okuda, Tomoaki ; Ikemori, Fumikazu ; Akata, Naofumi ; Kogure, Toshihiro. / Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident. In: Journal of Environmental Radioactivity. 2017 ; Vol. 172. pp. 122-129.
@article{cbd689b537ef4bf5be53e49da450614b,
title = "Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident",
abstract = "Most studies of the properties of airborne radionuclides emitted from the Fukushima Daiichi Nuclear Power Plant have focused on the relatively early stages of the accident, and little is known about the characteristics of radiocesium in the long-term. In this study, we analyzed activity size distributions of airborne radiocesium collected over 5 months in Tsukuba, Japan. Radiocesium in the accumulation mode size range (0.1–2 μm in aerodynamic diameter) was overwhelming in the early aerosol samples and decreased with time, while that associated with coarse aerosols remained airborne. We examined the radiocesium adsorbed onto airborne soil particles, and found that the size dependence of 137Cs surface density adsorbed on soil particles was weak. That is, radiocesium was distributed homogeneously throughout the aerodynamic diameter range of 2.1–11 μm. This characteristic may be related to the reported structure of radiocesium-bearing soil particles collected from the ground, which consisted of an aggregate of specific clay minerals and other non-cesium adsorbing particles. The resuspension factors for the first two aerosol samples collected during late April and May 2011 were close to those in European cities in the months following the Chernobyl accident, despite different soil and weather conditions.",
keywords = "Cs, Fukushima nuclear accident, Radionuclides, Resuspension, Soil dust particles, Surface density",
author = "Naoki Kaneyasu and Hideo Ohashi and Fumie Suzuki and Tomoaki Okuda and Fumikazu Ikemori and Naofumi Akata and Toshihiro Kogure",
year = "2017",
month = "6",
day = "1",
doi = "10.1016/j.jenvrad.2017.03.001",
language = "English",
volume = "172",
pages = "122--129",
journal = "Journal of Environmental Radioactivity",
issn = "0265-931X",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Weak size dependence of resuspended radiocesium adsorbed on soil particles collected after the Fukushima nuclear accident

AU - Kaneyasu, Naoki

AU - Ohashi, Hideo

AU - Suzuki, Fumie

AU - Okuda, Tomoaki

AU - Ikemori, Fumikazu

AU - Akata, Naofumi

AU - Kogure, Toshihiro

PY - 2017/6/1

Y1 - 2017/6/1

N2 - Most studies of the properties of airborne radionuclides emitted from the Fukushima Daiichi Nuclear Power Plant have focused on the relatively early stages of the accident, and little is known about the characteristics of radiocesium in the long-term. In this study, we analyzed activity size distributions of airborne radiocesium collected over 5 months in Tsukuba, Japan. Radiocesium in the accumulation mode size range (0.1–2 μm in aerodynamic diameter) was overwhelming in the early aerosol samples and decreased with time, while that associated with coarse aerosols remained airborne. We examined the radiocesium adsorbed onto airborne soil particles, and found that the size dependence of 137Cs surface density adsorbed on soil particles was weak. That is, radiocesium was distributed homogeneously throughout the aerodynamic diameter range of 2.1–11 μm. This characteristic may be related to the reported structure of radiocesium-bearing soil particles collected from the ground, which consisted of an aggregate of specific clay minerals and other non-cesium adsorbing particles. The resuspension factors for the first two aerosol samples collected during late April and May 2011 were close to those in European cities in the months following the Chernobyl accident, despite different soil and weather conditions.

AB - Most studies of the properties of airborne radionuclides emitted from the Fukushima Daiichi Nuclear Power Plant have focused on the relatively early stages of the accident, and little is known about the characteristics of radiocesium in the long-term. In this study, we analyzed activity size distributions of airborne radiocesium collected over 5 months in Tsukuba, Japan. Radiocesium in the accumulation mode size range (0.1–2 μm in aerodynamic diameter) was overwhelming in the early aerosol samples and decreased with time, while that associated with coarse aerosols remained airborne. We examined the radiocesium adsorbed onto airborne soil particles, and found that the size dependence of 137Cs surface density adsorbed on soil particles was weak. That is, radiocesium was distributed homogeneously throughout the aerodynamic diameter range of 2.1–11 μm. This characteristic may be related to the reported structure of radiocesium-bearing soil particles collected from the ground, which consisted of an aggregate of specific clay minerals and other non-cesium adsorbing particles. The resuspension factors for the first two aerosol samples collected during late April and May 2011 were close to those in European cities in the months following the Chernobyl accident, despite different soil and weather conditions.

KW - Cs

KW - Fukushima nuclear accident

KW - Radionuclides

KW - Resuspension

KW - Soil dust particles

KW - Surface density

UR - http://www.scopus.com/inward/record.url?scp=85016158070&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85016158070&partnerID=8YFLogxK

U2 - 10.1016/j.jenvrad.2017.03.001

DO - 10.1016/j.jenvrad.2017.03.001

M3 - Article

C2 - 28346896

AN - SCOPUS:85016158070

VL - 172

SP - 122

EP - 129

JO - Journal of Environmental Radioactivity

JF - Journal of Environmental Radioactivity

SN - 0265-931X

ER -