Experimental investigation of submicron and ultrafine soot particle removal by tree leaves
Soot particles emitted from vehicles are one of the major sources of air pollution in urban areas. In this study, five kinds of trees were selected as Pinus densiflora, Taxus cuspidata, Platanus occidentalis, Zelkova serrata, and Ginkgo biloba, and the removal of submicron (<1 μm) and ultrafine (...
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Published in | Atmospheric environment (1994) Vol. 45; no. 38; pp. 6987 - 6994 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier Ltd
01.12.2011
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | Soot particles emitted from vehicles are one of the major sources of air pollution in urban areas. In this study, five kinds of trees were selected as
Pinus densiflora,
Taxus cuspidata,
Platanus occidentalis,
Zelkova serrata, and
Ginkgo biloba, and the removal of submicron (<1 μm) and ultrafine (<0.1 μm) soot particles by tree leaves was quantitatively compared in terms of deposition velocity. Soot particles were produced by a diffusion flame burner using acetylene as the fuel. The sizes of monodisperse soot particles classified with the Differential Mobility Analyzers (DMA) were 30, 55, 90, 150, 250, 400, and 600 nm. A deposition chamber was designed to simulate the omni-directional flow condition around the tree leaves. Deposition velocities onto the needle-leaf trees were higher than those onto the broadleaf trees.
P. densiflora showed the greatest deposition velocity, followed by
T. cuspidata,
Platanus occidentalis,
Zelkova serrata, and
Ginkgo biloba. In addition, from the comparison of deposition velocity between two groups of
Platanus occidentalis leaves, i.e. one group of leaves with front sides only and the other with back sides only, it was supposed in case of the broadleaf trees that the removal of airborne soot particles of submicron and ultrafine sizes could be affected by the surface roughness of tree leaves, i.e. the veins and other structures on the leaves.
► Submicron and ultrafine soot particle removal by tree leaves was investigated. ► Deposition velocity was used for the quantitative comparison of particle removal. ►
Pinus densiflora showed the greatest deposition velocity, followed by. ►
Taxus cuspidata,
Platanus occidentalis,
Zelkova serrata, and
Ginkgo biloba. ► Airborne soot particle removal can be affected by surface roughness of tree leaves. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1352-2310 1873-2844 |
DOI: | 10.1016/j.atmosenv.2011.09.019 |