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Eficiencia de los pavimentos permeables para la retención de microplásticos de la escorrentía urbana
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Researchers evaluated the effectiveness of permeable pavements as sustainable urban drainage systems for retaining microplastics from urban stormwater runoff, testing their performance under controlled laboratory conditions calibrated to average rainfall patterns in Valencia, Spain. Results showed a significant reduction in microplastic particle counts in water passing through the permeable pavement layers.
[SPA] Durante eventos de precipitación, la escorrentía lava la superficie urbana transportando microplásticos hacia el medio receptor. El impacto negativo que provoca este contaminante en el medio ambiente plantea la necesidad de controlarlo. El uso potencial de los Sistemas Urbanos de Drenaje Sostenible (SUDS), y en particular de los pavimentos permeables, logran reducir significativamente las partículas en suspensión arrastradas por la escorrentía. El estudio tiene como objetivo investigar la efectividad de los pavimentos permeables para la retención de microplásticos, ensayando su respuesta en condiciones de laboratorio y bajo el régimen de precipitaciones medias de Valencia (España). Los resultados mostraron una reducción significativa en el número de microplásticos infiltrados a través del pavimento permeable (94%). Los fragmentos de polipropileno de tamaño superior a 0.1 mm fueron las partículas más retenidas. Aunque todavía es necesario mejorar la eficiencia de retención de microplásticos en forma de fibras, la implementación de pavimentos permeables en las ciudades puede ayudar a reducir el contenido de microplásticos en las descargas de escorrentías pluviales. [ENG] Stormwater runoff washes off urban surfaces and drives microplastics to receiving water bodies. The negative impact caused by this pollutant in the environment, raises the need to control it. The potential use of Sustainable Urban Drainage Systems, and permeable pavements in particular, manage to significantly reduce suspended particles washed-off by runoff. The study aims to investigate how effective are permeable pavements at microplastic retention. The response of a permeable pavement was tested under the average rainfall regime of Valencia (Spain). The results showed a significant reduction in the number of infiltrated microplastics through the permeable pavement (94%). Polypropylene fragments were the most retained particles. Although it is still necessary to improve fibre retention efficiency, the implementation of permeable pavements in the urban environment may help to reduce microplastic content in stormwater runoff discharges.
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