2026-02-01 PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 2026 207(卷), null(期), (null页)
Because of automobiles and human activity, urban runoff is a major source of microplastics (MPs) pollution in the water environment. In this study, we selected collapsible loess bioretention facilities located on the underlying surfaces of roads in Qingyang City as the subject of the research. The removal of runoff MPs and the degree of ecological risk reduction by the facilities in different rainfall periods were obtained. The findings indicated that MPs removal rates ranged from 43.15 % to 72.42 %. Polyethylene terephthalate (PET), fiber and particle size (20-50 mu m) had the highest removal rates of 72.85 %, 69.96 % and 62.14 %. Facilities can reduce the ecological risk of MPs. In the future, enhancing the collapsible loess filler will be essential for increasing both its stability and purification performance. It provides a theoretical foundation for efficient removal and ecological risk control of Northwest Loess Plateau urban runoff MPs.