DOI: 10.1016/j.watres.2018.07.050
Scopus记录号: 2-s2.0-85053057592
论文题名: Preferential accumulation of small (<300 Μm) microplastics in the sediments of a coastal plain river network in eastern China
作者: Wang Z. ; Su B. ; Xu X. ; Di D. ; Huang H. ; Mei K. ; Dahlgren R.A. ; Zhang M. ; Shang X.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 393
结束页码: 401
语种: 英语
英文关键词: Coastal plain rivers
; Fate and transport
; Microplastics
; Sediment
; Size spectrum
Scopus关键词: Ecosystems
; Land use
; Landforms
; Rivers
; Coastal plain river
; Fate and transport
; Industrial land
; Microplastic particles
; Microplastics
; Possible mechanisms
; Riverine sediments
; Size spectrum
; Sediments
; concentration (composition)
; environmental fate
; fluvial deposit
; marine ecosystem
; plastic waste
; pollutant transport
; sediment pollution
; shore (nonmarine)
; watershed
; article
; China
; coastal plain
; foam
; industrial area
; sea
; sediment
; stream (river)
; watershed
; China
英文摘要: Microplastics are a global concern for their threat to marine ecosystems. Recent studies report a lack of smaller microplastics (<300 μm) in oceans attributed to a “loss in ocean”. Several hypotheses have been proposed to explain the absence of smaller microplastics, but their fate and transport remain an enigma. Our study recovered high concentrations of microplastics (32947 ± 15342 items kg−1 dry sediment) from sediments of a coastal plain river network in eastern China, with the <300 μm fraction accounting for ∼85% of total microplastic particles. Microplastic concentrations were generally higher in sediments from tributary streams and streams surrounded by industrial land use. The high variability of microplastics within the watershed indicates that the distribution of microplastics is regulated by several factors, such as distance to source(s), river flow characteristics, buoyancy behavior, degradation, etc. Fragment and foam forms dominated the small microplastics, while fibers were less prevalent in the <300 μm fraction and more abundant in downstream sites. The dominance of small microplastics in riverine sediments in this study provides a possible mechanism to explain the relative absence of small microplastics in the ocean, and advocates for quantification of the whole size spectrum of microplastics in future studies of riverine microplastic fluxes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112504
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Watershed Sciences and Health of Zhejiang Province, School of Public Health and Management, Wenzhou Medical University, Wenzhou, 325035, China; Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography SOA, Hangzhou, 310012, China; Department of Land, Air and Water Resources, University of California, Davis, CA 95616, United States
Recommended Citation:
Wang Z.,Su B.,Xu X.,et al. Preferential accumulation of small (<300 Μm) microplastics in the sediments of a coastal plain river network in eastern China[J]. Water Research,2018-01-01,144