期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 790, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2021.148200
关键词
Microplastics; Reed; Plant; Sediment; Pollution
资金
- Program for the National Natural Science Foundation of China [51879101, 51579098, 51779090, 51709101, 51521006, 51809090]
- National Program for Support of Top-Notch Young Professionals of China (2014)
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13R17]
- Hunan Provincial Science and Technology Plan Project [2018SK20410]
- Science and Technology Innovation Program of Hunan Province [2020RC4014]
This study reveals the accumulation of microplastics in freshwater reeds, with varying levels of abundance in different areas. Lake water and fisheries are identified as significant sources of microplastics.
Microplastic pollution has recently gained increasing attention. The accumulation of microplastics in plants has been confirmed in the marine environment. However, the extent of the microplastic retention in freshwater plants is still unknown. In this study, sediment and plant samples from six reed farms in the wetland of East Dongting Lake were collected and analyzed. The abundance of microplastics in the sediment of reed farms varied from 125.7 to 1219.5 items/kg dry weight (dw), with an average of 511.2 +/- 295.0 items/kg. Moreover, different levels of microplastic abundance were found in reeds from 0 to 14 items/individual. The abundance of microplastics in sediment samples was moderate compared to that worldwide and higher than that in other regions of Dongting Lake. The microplastic pollution level was significantly higher in the reed vegetation belt than that in other sampling positions. On the basis of the distribution and characteristics of the collected microplastics, lake water and fishery are suggested as important sources of microplastics. Furthermore, the factors influencing microplastic retention in the reeds are discussed. This study, as the first direct evidence demonstrating that freshwater reeds tend to accumulate microplastics, constitutes valuable reference for future research. (c) 2021 Elsevier B.V. All rights reserved.
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