College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China.
Chengdu Environmental Monitoring Center Station of Sichuan Province, Chengdu 610066, China.
Int J Environ Res Public Health. 2022 Jul 23;19(15):8972. doi: 10.3390/ijerph19158972.
Microplastics are widely found in oceans and rivers. In China, the research on microplastic pollution in inland urban fresh waters of China is insufficient. We studied microplastics in the surface waters of urban rivers in Chengdu, which is the largest city in western China. The concentration of microplastics in the analysis environment ranged from 5.00 to 10.5 items/L, and the average quantity was 8.82 items/L. The majority of the microplastics were transparent and took the form of fragments, particles, and fibers. Polyethylene terephthalate (PET) and polyamide (PA) were the dominant polymer types of the microplastics analyzed. Plastic particles ≤ 500 μm accounted for 69.8% of the total. This large proportion of small transparent microplastics in urban rivers in Chengdu is a potential threat to the growth of aquatic organisms and birds foraging from the river and may pose hazards to human health. Additionally, the correlation of microplastic content with population quantity and economic level was calculated by the Pearson coefficient method (p < 0.05), and the results showed that both have an important effect on the number of microplastics in rivers. This research provides a reference for understanding the level of microplastics in urban rivers in Chengdu and pollution control.
微塑料广泛存在于海洋和河流中。在中国，对中国内陆城市淡水微塑料污染的研究还不够。我们研究了中国西部最大城市成都城市河流的地表水中的微塑料。分析环境中微塑料的浓度范围为 5.00 至 10.5 项/L，平均值为 8.82 项/L。微塑料主要为透明状，形态有碎片、颗粒和纤维。聚对苯二甲酸乙二醇酯（PET）和聚酰胺（PA）是分析的微塑料的主要聚合物类型。≤500μm 的塑料颗粒占总颗粒的 69.8%。成都城市河流中大量存在的小而透明的微塑料，对河流中水生生物的生长和以河流为食的鸟类构成潜在威胁，可能对人类健康造成危害。此外，采用皮尔逊系数法（p<0.05）计算微塑料含量与人口数量和经济水平的相关性，结果表明两者对河流中微塑料数量都有重要影响。本研究为了解成都城市河流中微塑料的水平和污染控制提供了参考。
