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Microplastic pollution characteristic in surface water and freshwater fish of Gehu Lake, China
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Researchers found an average microplastic abundance of 6.33 particles per liter in surface water and 10.7 items per individual fish in Gehu Lake, China, with transparent fibers and polyethylene terephthalate being the dominant microplastic type and polymer respectively.
Abstract Much more attention has been poured into microplastic pollution in freshwater systems recently. In the present study, the pollution of microplastics (MPs) in surface water and freshwater fish (crucian carp, etc.) were investigated from Gehu Lake, which is the second largest lake in southern Jiangsu after Taihu Lake. The result manifested that the average abundance of MPs was respectively 6.33 ± 2.67 n/L for surface water and 10.7 items per individual for freshwater fish. The distribution of MPs in Gehu Lake varied from place to place, with the highest abundance of MPs was observed in the two estuaries of the eastern part of the lake. It was speculated that topographical factors and human factors were the main factors affecting the abundance and distribution of MPs. Transparent fibers were the main type of MPs in water samples, accounting for 69.70% of all detected particles. Meanwhile, most of the MPs ingested by freshwater fish were fibers, and the main colors were transparent and blue. In addition, the dominant size of the MPs was between 0.1 mm to 0.5 mm in water and fish samples. Moreover, PES, Man-made fiber, and PP were the dominant polymer types in the surface water and fish samples. The results of this investigation can provide basic data for the research and management of MPs in freshwater systems.
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Microplastic pollution characteristic in surface water and freshwater fish of Gehu Lake, China
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Researchers analyzed the horizontal and vertical distribution of microplastics at different water depths across Gehu Lake in China, finding microplastics present throughout all depth layers with surface water showing the highest abundance (3.13 plus or minus 0.32 items/L) and bottom water the lowest (1.03 plus or minus 0.14 items/L). They found that most microplastic particles ranged from 100 to 500 micrometers in size with fibrous shapes predominating, and identified polyethylene terephthalate and polypropylene as the main polymer types in the lake.
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