DOI: 10.1016/j.watres.2018.02.063
Scopus记录号: 2-s2.0-85042860463
论文题名: The role of autochthonous organic matter in radioactive cesium accumulation to riverine fine sediments
作者: Fujii M. ; Ono K. ; Yoshimura C. ; Miyamoto M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 137 起始页码: 18
结束页码: 27
语种: 英语
英文关键词: Allochthonous organic matters
; Fukushima Daiichi Nuclear Power Plant
; Radioactive cesium
; Riverine fine sediments
Scopus关键词: Amorphous materials
; Biogeochemistry
; Biological materials
; Cesium
; Nuclear energy
; Nuclear fuels
; Nuclear power plants
; Nuclear reactor accidents
; Organic compounds
; Radioactivity
; Sedimentology
; Allochthonous organic matter
; Environmental concerns
; Fine sediments
; Fukushima dai-ichi nuclear power plants
; High specific surface area
; Intermediate densities
; Radioactive cesiums
; Sedimentary environment
; Sediments
; autochthonous organic matter
; cesium
; hydrogen peroxide
; organic matter
; unclassified drug
; carbon
; cesium
; nitrogen
; allochthon
; anthropogenic effect
; cesium
; fine grained sediment
; fluvial deposit
; nuclear power plant
; organic matter
; radionuclide
; adsorption
; Article
; dissolution
; environmental radioactivity
; Fukushima nuclear accident
; nuclear power plant
; particle resuspension
; priority journal
; river
; sediment
; surface area
; water quality
; X ray diffraction
; analysis
; chemistry
; nuclear power plant
; river
; sediment
; water pollutant
; Abukuma River
; Honshu
; Japan
; Tohoku
; Carbon
; Cesium Radioisotopes
; Fukushima Nuclear Accident
; Geologic Sediments
; Hydrogen Peroxide
; Nitrogen
; Nuclear Power Plants
; Rivers
; Water Pollutants, Radioactive
英文摘要: Anthropogenically released radioactive cesium (RCs) poses serious ecological and environmental concerns given its persistency in the environment. Although accumulation of RCs in aqueous and sedimentary environments is often reported to associate with organic matter (OM), the mechanisms responsible remain unclear. Here, we investigated RCs in fine sediments along the Abukuma River, the largest river near the Fukushima Daiichi Nuclear Power Plant, 1.5–4 years after the accident. Measuring the density-separated sediment fractions with a broad range of OM content (%) indicated that the RCs concentration (Bq·kg−1) is positively correlated with OM content for intermediate-density fractions in which OM is primarily characterized by autochthonous origin. This relationship, however, did not hold for light-density fractions containing a high proportion of large-size allochthonous OM. Furthermore, H2O2-assisted OM digestion and amorphous material dissolution treatments resulted in only a minor reduction in sedimentary RCs. These results along with the fact that sediments with high autochthonous OM content showed high specific surface area indicated that RCs is tightly associated with finer-grained and chemically non-labile inorganic fractions concurrently resident with autochthonous OM. Overall, our findings highlight that autochthonous OM exerts a significant control on the accumulation, transport, and fate of RCs in aqueous and sedimentary environments. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112829
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, Tokyo Institute of Technology, 2-12-1-M1-4 Ookayama, Tokyo, 152-8552, Japan
Recommended Citation:
Fujii M.,Ono K.,Yoshimura C.,et al. The role of autochthonous organic matter in radioactive cesium accumulation to riverine fine sediments[J]. Water Research,2018-01-01,137