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Particulate pollution capture by urban trees: effect of species and windspeed

Particulate pollution capture by urban trees: effect of species and windspeed
Particulate pollution capture by urban trees: effect of species and windspeed
Particulate pollution is a serious health problem throughout the world, exacerbating a wide range of respiratory and vascular illnesses in urban areas. The use of trees to reduce the effects of these pollutants has been addressed in the literature, but has rarely been quantified. The aim of the present study was to quantify the effectiveness of five tree species ? pine (Pinus nigra var. maritima), cypress ( × Cupressocyparis leylandii), maple (Acer campestre), whitebeam (Sorbus intermedia), poplar (Populus deltoides × trichocarpa'Beaupré') ? in capturing pollutant particles. This was achieved by exposing them to NaCl droplets of approximately 1 ?m diameter at a range of windspeeds in two windtunnels. The deposition velocity (Vg) and particle trapping efficiency (Cp) were calculated from these exposures. In addition, a variable dependent on foliage structure [Stokes number (St)] was correlated with Cp to gauge the effect of tree morphology on particle capture. Maximum Cp values ranged from 2.8% for P. nigra, to 0.12% and 0.06% for P. trichocarpa×deltoides and A. campertre, respectively. The finer, more complex structure of the foliage of the two conifers (P. nigra and C. leylandii) explained their much greater effectiveness at capturing particles. The data presented here will be used to model the effectiveness of tree planting schemes in improving urban air quality by capturing pollutant particles.
deposition velocity, particulates, pm10, stokes number, trapping effciency, urban trees
1354-1013
995-1003
Beckett, K. Paul
450029b8-58e3-4a3c-a4ff-480d126acaaf
Freer Smith, P. H.
9713d9e9-3561-4ebe-950c-1fbe47ca20aa
Taylor, Gail
f3851db9-d37c-4c36-8663-e5c2cb03e171
Beckett, K. Paul
450029b8-58e3-4a3c-a4ff-480d126acaaf
Freer Smith, P. H.
9713d9e9-3561-4ebe-950c-1fbe47ca20aa
Taylor, Gail
f3851db9-d37c-4c36-8663-e5c2cb03e171

Beckett, K. Paul, Freer Smith, P. H. and Taylor, Gail (2000) Particulate pollution capture by urban trees: effect of species and windspeed. Global Change Biology, 6 (8), 995-1003. (doi:10.1046/j.1365-2486.2000.00376.x).

Record type: Article

Abstract

Particulate pollution is a serious health problem throughout the world, exacerbating a wide range of respiratory and vascular illnesses in urban areas. The use of trees to reduce the effects of these pollutants has been addressed in the literature, but has rarely been quantified. The aim of the present study was to quantify the effectiveness of five tree species ? pine (Pinus nigra var. maritima), cypress ( × Cupressocyparis leylandii), maple (Acer campestre), whitebeam (Sorbus intermedia), poplar (Populus deltoides × trichocarpa'Beaupré') ? in capturing pollutant particles. This was achieved by exposing them to NaCl droplets of approximately 1 ?m diameter at a range of windspeeds in two windtunnels. The deposition velocity (Vg) and particle trapping efficiency (Cp) were calculated from these exposures. In addition, a variable dependent on foliage structure [Stokes number (St)] was correlated with Cp to gauge the effect of tree morphology on particle capture. Maximum Cp values ranged from 2.8% for P. nigra, to 0.12% and 0.06% for P. trichocarpa×deltoides and A. campertre, respectively. The finer, more complex structure of the foliage of the two conifers (P. nigra and C. leylandii) explained their much greater effectiveness at capturing particles. The data presented here will be used to model the effectiveness of tree planting schemes in improving urban air quality by capturing pollutant particles.

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More information

Published date: 2000
Keywords: deposition velocity, particulates, pm10, stokes number, trapping effciency, urban trees

Identifiers

Local EPrints ID: 159957
URI: https://eprints.soton.ac.uk/id/eprint/159957
ISSN: 1354-1013
PURE UUID: 067fe51a-3245-4dd5-a39c-37a78014c275
ORCID for Gail Taylor: ORCID iD orcid.org/0000-0001-8470-6390

Catalogue record

Date deposited: 08 Jul 2010 12:06
Last modified: 08 Oct 2019 00:51

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