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Physicochemical characteristics of airborne microplastics of a typical coastal city in the Yangtze River Delta Region,China

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Journal of Environmental Sciences 2025年第2期148卷 602-613页

作者： Pengju Liu Longyi Shao Ziyu Guo Yaxing Zhang Yaxin Cao Xuying Ma Lidia Morawska State Key Laboratory of Coal Resources and Safe Mining&College of Geoscience and Surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China College of Geomatics Xi’an University of Science and TechnologyXi’an 710054China International Laboratory for Air Quality and Health(ILAQH) Queensland University of TechnologyBrisbaneQLD 4000Australia

Airborne microplastics(MPs)are important pollutants that have been present in the environment for many years and are characterized by their universality,persistence,and potential *** study investigated the effects of terrestrial and marine transport of MPs in the atmosphere of a coastal city and compared the difference between daytime and *** direct infrared imaging(LDIR)and polarized light microscopy were used to characterize the physical and chemical properties of MPs,including number concentration,chemical types,shape,and *** trajectories were used to distinguish the air masses from marine and terrestrial *** chemical types were detected by LDIR,with rubber(16.7%)and phenol-formaldehyde resin(PFR;14.8%)being major *** main morphological types of MPs were identified,and fragments(78.1%)are the dominant *** in the atmosphere were concentrated in the small particle size segment(20-50μm).The concentration of MPs in the air mass from marine transport was 14.7 items/m^(3)-lower than that from terrestrial transport(32.0 items/m^(3)).The number concentration of airborne MPs was negatively correlated with relative *** from terrestrial transport were mainly rubber(20.2%),while those from marine transport were mainly PFR(18%).MPs in the marine transport air mass were more aged and had a lower number concentration than those in the terrestrial transport air *** number concentration of airborne MPs is higher during the day than at *** findings could contribute to the development of targeted control measures and methods to reduce MP pollution.

关键词： Airborne microplastics(MPs) Laser direct infrared imaging(LDIR) Polarized light microscopy terrestrial transport Marine transport Relative humidity

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