Potential of particle matter dry deposition on green roofs and living walls vegetation for mitigating urban atmospheric pollution in semiarid climates

Margareth Viecco, Sergio Vera, Héctor Jorquera, Waldo Bustamante, Jorge Gironás, Cynnamon Dobbs, Eduardo Leiva

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67 Citas (Scopus)

Resumen

In the last two decades, the incorporation of green roofs and living walls in buildings has increased significantly worldwide because of their benefits such as building energy savings, promoting biodiversity, controlling water run-off, mitigating urban heat island effect, improving indoor and urban air quality, and connecting people with nature. However, few studies have quantified the impact of green roofs (GRs) and living walls (LWs) on mitigating air pollution, especially in semiarid climates where airborne particle matter (PM) levels are high. Therefore, the aim of this paper is quantifying the dry deposition of PM10 and PM2.5 by several vegetation species commonly used in GRs and LWs in semiarid climates. Five species (Pitosporum tobira, Lavandula angustifolia, Lampranthus spectabillis, Sedum album, and Sedum reflexum) for GRs and four species (Aptenia cordiflora, Erigeron karvinskianus, Sedum palmeri, and Sedum spurium p.) for LWs were tested in an experimental facility—through washing, filtering, and weighing—to quantify the dry deposition of PM2.5 and PM10 on vegetation leaves as well as PM captured by the leaf wax. The main result is that a significant amount of PM is deposited on the typical vegetation used in GRs and LWs in semiarid climates. However, large differences in PM dry deposition were found among species, ranging from 0.09 μg/cm2∙h−1 to 1.32 μg/cm2∙h−1 for PM2.5, 0.48 μg/cm2∙h−1 to 4.7 μg/cm2∙h−1 for PM10 and 0.41 μg/cm2∙h−1 to 25.6 μg/cm2∙h−1 for leaf wax. The species that showed the highest potential to capture PM were S. album, S. reflexum, S. palmeri, and L. spectabillis. This study shows this green infrastructures can contribute to mitigate air pollution, thus GRs and LWs have the potential for being included in decontamination plans.
Idioma originalInglés
Número de artículo2431
PublicaciónSustainability (Switzerland)
Volumen10
N.º7
DOI
EstadoPublicada - 12 jul. 2018

Nota bibliográfica

Publisher Copyright:
© 2018 by the authors.

Palabras clave

  • particulate matter (PM)
  • air pollutants
  • green roofs
  • living walls
  • air quality
  • sustainable urban development
  • vegetation species
  • PM2.5
  • PM10
  • wax
  • dry deposition
  • PM capture

Tipos de Productos Minciencias

  • Artículos de investigación con calidad A2 / Q2

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