College of Architecture & Environment, Sichuan University, Chengdu 610065, China.
College of Architecture & Environment, Sichuan University, Chengdu 610065, China.
Sci Total Environ. 2022 Nov 10;846:157411. doi: 10.1016/j.scitotenv.2022.157411. Epub 2022 Jul 16.
In this study, microplastics (MPs) in urban rivers in the Chengdu eco-zone were systematically studied. Microscopic observations and Fourier-transform infrared spectroscopy were used to determine the microplastic (MP) types. The MPs abundance ranged from 20.92 items/L to 762.95 items/L in water and from 20.92 items/100 g dry weight to 58.57 items/100 g dry weight in sediment. In both the water sample and sediment samples, the dominant MPs morphologies were fibres, lumps, and fragments, and the size of MPs was predominantly distributed in the 50-500 μm rage. The primary polymers were polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET). Locations with large populations and large areas of woodland and construction land tended to exhibit higher concentrations of MPs. Additionally, compared to water samples, sediment exhibited a more reliable correlation fitting data, thus indicating that sediment was more stable in reflecting the presence of MPs in rivers. This study supplemented the gap in MPs pollution in urban rivers in Chengdu city and discussed the impact of land use and population on the distribution of MPs. Suggestions were provided to alleviate MPs pollution in urban rivers from the perspective of urban planning.
本研究系统地研究了成都生态区城市河流中的微塑料（MPs）。采用微观观察和傅里叶变换红外光谱法确定微塑料（MP）类型。水中微塑料的丰度范围为 20.92 项/L 至 762.95 项/L，沉积物中微塑料的丰度范围为 20.92 项/100g 干重至 58.57 项/100g 干重。在水样和沉积物样品中，主要的 MPs 形态是纤维、块状物和碎片，MPs 的大小主要分布在 50-500μm 范围内。主要聚合物为聚乙烯（PE）、聚丙烯（PP）、聚苯乙烯（PS）和聚对苯二甲酸乙二醇酯（PET）。人口多、林地和建设用地面积大的地方，MPs 浓度往往较高。此外，与水样相比，沉积物的拟合数据更可靠，这表明沉积物在反映河流中 MPs 的存在方面更稳定。本研究补充了成都市城市河流中 MPs 污染的空白，并讨论了土地利用和人口对 MPs 分布的影响。从城市规划的角度出发，为缓解城市河流中的 MPs 污染提出了建议。
