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| Occurrence characteristics and risk assessment of microplastics in Songhua River (Jilin City Section) |
| HE Hao-nan1**, LIU Hui1, ZOU Ji-ying1*, XIAO Qi-tian1**, QIU Ze-zu1**, HOU Zhe-sheng2
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| 1.Jilin Institute of Chemical Technology, School of Resource and Environmental Engineering, Jilin 132022, China;2.Jilin Province Straw Raw Material Engineering Research Center,Jilin 132022, China |
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Abstract As an emerging pollutant, microplastics have been shown to cover widely in the global marine and freshwater environments. In order to clarify the microplastic pollution in the Jilin section of the Songhua River, 17 sampling points from the Songhua Lake in the upstream to the Jiuzhan Bridge in the downstream of the Jilin section of the Songhua River were selected as the research objects, and the occurrence characteristics, correlation and ecological risks of microplastics in the Songhua River were studied. The results showed that the microplastic pollution in the Jilin section of Songhua River was serious, and the abundance of microplastics in the water body was 401.64 n·m-3~4242.02 n·m-3, and the average abundance of microplastics was 1011.86 n·m-3. It mainly includes five shapes: block, sheet, foam, filament and membrane, among which the lumpy is the most (40%), followed by filament (29.5%), foam (23.3%), flake (4.9%), and membrane (0.2%). A total of 11 colors of microplastics were found, and the white and colorless contents accounted for the majority, and the particle size of microplastics was mainly less than 0.5mm in the water body. There was no significant correlation between pH, ammonia nitrogen content, and total phosphorus content and microplastic abundance for environmental factors, and a strong correlation between lumpy and foamy microplastics for shape. The pollution load index (PLI) ranged from 0.24~0.80, and the Nemeiro index was 0.46, both of which belonged to the low pollution level. Studies have shown that human activities are a major reason for microplastics to enter the Songhua River, and most of the microplastics come from the degradation and rupture of large plastic products. It fills the gap in the understanding of the distribution of microplastics in Jilin City, Songhua River, and provides new data support and direction for the study of microplastic pollution in Songhua River and the control and treatment of microplastic pollution sources in Songhua River.
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Published: 20 December 2025
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