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Occurrence characteristics and ecological risks of microplastic in sediments from an urban lake
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Bo LI1, 2, Jian-yun XIE1, Bin HONG3, Yan-peng CAI2, *, Jin-ping PENG4, Bo-wen LI2, Qun-po JIA5
China Environmental Science | 2025, 45(6) : 3289 - 3298
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China Environmental Science | 2025, 45(6): 3289-3298
• Environmental Ecology •
Occurrence characteristics and ecological risks of microplastic in sediments from an urban lake
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Bo LI1, 2, Jian-yun XIE1, Bin HONG3, Yan-peng CAI2, *, Jin-ping PENG4, Bo-wen LI2, Qun-po JIA5
Affiliations
  • 1.Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Chongqing 404020, China
  • 2.Guangdong Basic Research Center of Excellence for Ecological Security and Green Development, Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Guangzhou 510006, China
  • 3.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
  • 4.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
  • 5.Ecological and Environmental Monitoring and Scientific Research Center, Yellow River Basin Ecological and Environmental Administration Ministry of Ecology and Environment, Zhengzhou 450000, China
Published: 2025-06-20
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A typical urban lake (Xinghu Lake) in the Guangdong Hong Kong Macao Greater Bay Area was selected as the study area, and the density flotation method was used to extract microplastics from surface sediments. The spatiotemporal occurrence characteristics of microplastic were presented, and the potential ecological risks of microplastic were revealed, and the spatial autocorrelation of microplastic abundance was analyzed. The results showed that the average abundances of microplastic in surface sediments of Xinghu Lake were (637±392) and (1765±883) particles/kg during the wet and dry seasons, respectively. Here, the colors of microplastic were mainly blue and black, lines were the dominant microplastic shapes, and the size of microplastic was concentrated in the range of 100 to 2000µm. Rayon, polypropylene, and polyethylene terephthalate were the main polymer types of microplastic in surface sediments of Xinghu Lake during the wet and dry seasons. The abundances of microplastic in surface sediments of Xinghu Lake showed a strong spatial autocorrelation during different seasons, and the sampling interval for microplastic should be less than 435m here. Meanwhile, the average comprehensive potential ecological risk indexes of microplastic in surface sediments of Xinghu Lake were 53.0 9and 344.08 during the wet and dry seasons, which were the slight and very strong risk levels, respectively. Furthermore, the potential ecological risks of rayon microplastics were relatively high.

Xinghu Lake  /  sediment  /  microplastic  /  occurrence characteristic  /  spatial autocorrelation  /  ecological risk
Bo LI, Jian-yun XIE, Bin HONG, Yan-peng CAI, Jin-ping PENG, Bo-wen LI, Qun-po JIA. Occurrence characteristics and ecological risks of microplastic in sediments from an urban lake[J]. China Environmental Science, 2025 , 45 (6) : 3289 -3298 .
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  • Receive Date：2024-11-05
  • Online Date：2026-02-27
  • Published：2025-06-20
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  • Received：2024-11-05
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Affiliations
    1.Chongqing Key Laboratory of Water Environment Evolution and Pollution Control in Three Gorges Reservoir, Chongqing Three Gorges University, Chongqing 404020, China
    2.Guangdong Basic Research Center of Excellence for Ecological Security and Green Development, Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Guangzhou 510006, China
    3.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
    4.School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
    5.Ecological and Environmental Monitoring and Scientific Research Center, Yellow River Basin Ecological and Environmental Administration Ministry of Ecology and Environment, Zhengzhou 450000, China
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表12种不同金属材料的力学参数
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小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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