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关键词： Lakes  

摘要： Rivers and lakes are important channels for the migration，transformation，and transportation of microplastics（MPs）pollution from land sources into the sea. A large number of studies have investigated the pollution characteristics of MPs in different watersheds，but little to none have considered the driving factors for spatial distribution based on network analysis. In this study，Taihu Lake，Taipu River，and Huangpu River in the Yangtze River Delta were selected as the target area. Microplastics were analyzed based on field sampling，stereomicroscopy，and Fourier transform infrared spectroscopy. According to the results，MPs were 100% detected at all sampling sites. The abundance of MPs in the surface water of Taihu Lake［（7 076±1 886）n·m-3］was significantly higher than that of the Taipu River［（4 400±2 839）n·m-3］and the Huangpu River［（2 800±1 315）n·m-3］，indicating a significant spatial distribution difference. The particle size of MPs was mainly distributed in the range of 0.1-0.5 mm，with transparent，black color，and fibers as the main MPs. Polyethylene terephthalate（PET），polystyrene（PS），and polyamide（PA）were the major contributors of polymers，accounting for 59.5%，10.4%，and 8.67%，respectively. Correlation analysis showed that the MPs abundance was significantly positively correlated with total nitrogen（TN），Co（R=0.436，PZONE © 2025 Science Press. All rights reserved.