長江口潮灘表層沉積物中微塑料的分佈及沉降特點

朱曉桐, 衣俊, 強麗媛, 程金平

Research output: Contribution to journalArticlespeer-review

30 Citations (Scopus)

Abstract

河口區域是污染物的源頭與交匯的區域。為探索微塑膠在長江口潮灘的污染現狀,本文選取長江口6個採樣點、4個季度的潮灘沉積物進行採樣分析,長江口潮灘沉積物中微塑膠檢測結果顯示的平均豐度為(3.42±1.31)items·g⁻¹,有纖維狀和碎片狀兩種存在形式,其中纖維狀占主要部分。微塑膠在潮灘沉積物中的分佈與沉降和長江口沖淤情況有著高度一致性,在沉積物沖刷地段位點微塑膠豐度較低,在沉積物淤積位點微塑膠豐度較高。長江口潮灘沉積物中微塑膠豐度在1月達到最高值,且在1月和4月各位點差異較大,在7月和11月差異較小。再懸浮實驗表明,微塑膠主要在表層沉積物和水中積聚。本文結果表明,長江口潮灘沉積物受到一定程度的微塑膠污染,微塑膠在潮灘的積聚與長江口沖淤、降水和潮汐等因素密切相關。本文的結果可以為長江口潮灘表層沉積物中微塑膠的污染研究提供一定的基礎資料。
This study is designed to understand the microplastic contamination in the coastal area of Yangtze estuary. The abundance and distribution profiles of microplastics in the surface sediment of six sampling sites along the Yangtze estuary were examined throughout one year. The detected average concentration of microplastic, including fibers and fragments, in the surface sediment of Yangtze estuary was (3.42±1.31) items•g⁻¹ (DW). Sampling during four seasons, in the months of January, April, July, and November, indicated that the highest abundance of microplastics in Yangtze estuary surface sediment occurred in January. A re-suspension experiment showed that microplastics tend to settle in the surface sediment after re-suspension. The distribution and settlement of microplastics along the coastal area has a high concordance with the dynamic erosion-accretion process of the Yangtze estuary. Microplastics tend to settle in accretion sites rather than in erosion sites. Copyright © 2018 中國科學院生態環境研究中心.
Original languageChinese (Simplified)
Pages (from-to)2067-2074
Journal環境科學
Volume39
Issue number5
DOIs
Publication statusPublished - 15 May 2018

Citation

朱曉桐、衣俊、強麗媛和程金平(2018):長江口潮灘表層沉積物中微塑料的分佈及沉降特點,《環境科學》,39(5),頁2067-2074。

Keywords

  • 微塑膠
  • 潮灘沉積物
  • 季度特徵
  • 沉降特點
  • 長江口
  • Distribution
  • Microplastics
  • Seasonal patterns
  • Surface sediment
  • Yangtze estuary
  • Alt. title: Distribution and settlement of microplastics in the surface sediment of Yangtze Estuary