School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China.
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China.
Sci Total Environ. 2021 Feb 10;755(Pt 2):142606. doi: 10.1016/j.scitotenv.2020.142606. Epub 2020 Oct 3.
Urban rainwater runoff is considered to be an important way to transport microplastics into the freshwater. By analyzing the microplastics in rainwater pipelines in different land function areas in Hongshan District (Wuhan, China), the preliminary results of microplastics abundance and characteristics in rainwater pipelines and rainwater pipeline sediments were obtained. The microplastics abundance in water samples was 2.75 ± 0.76 to 19.04 ± 2.96 items/L, the abundance of microplastics in the sediment was 6.00 ± 1.63 to 27.33 ± 4.64 items/100 g. The highest abundance among the samples was in the business district and the lowest in the campus. The microplastics in water samples and sediment samples were mainly fragments, accounting for 44.7% and 57.1%, respectively. The proportion of particle size <1 mm was 75.0% and above. The color of microplastics was diversified, and colored particles occupied over 60.0%. The types of polymers detected were mainly polyethylene, polypropylene and polyester, which were related to the types of polymers widely used in life. This study shows that urban rainwater pipelines is one of the ways for land-based microplastics to migrate to freshwater, and the accumulation of microplastics in stormwater pipe sediments might be an important contributor to microplastics in freshwater area.
城市雨水径流被认为是将微塑料输送到淡水中的重要途径。通过分析武汉市洪山区不同土地功能区雨水管道中的微塑料，初步获得了雨水管道和雨水管道沉积物中微塑料丰度和特征的初步结果。水样中微塑料丰度为 2.75±0.76 至 19.04±2.96 项/L，沉积物中微塑料丰度为 6.00±1.63 至 27.33±4.64 项/100g。在所有样本中，商业区的微塑料丰度最高，而校园的微塑料丰度最低。水样和沉积物样品中的微塑料主要为碎片，分别占 44.7%和 57.1%。粒径<1mm 的比例均在 75.0%以上。微塑料的颜色多样化，有色颗粒占比超过 60.0%。检测到的聚合物类型主要为聚乙烯、聚丙烯和聚酯，这与生活中广泛使用的聚合物类型有关。本研究表明，城市雨水管道是陆基微塑料向淡水迁移的途径之一，雨水管道沉积物中微塑料的积累可能是淡水微塑料的重要来源。
