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- Title
亚热带常绿树种对不同粒径颗粒物的滞留能力.
- Authors
林鑫涛; 叶诺楠; 王 彬; 陈 健; 游诗雪; 张昕丽
- Abstract
Both inhalable particulate matter (PM10) and fine particulate matter (PM2.5) are the primary pollutants in most of the cities in China,which are known for the harmness to human health. Urban plants could be used as biological filters, playing an important role in reducing the concentrations of particulate matters in the air as result of adsorbing and arresting particulate matters on their foliage. Three typical types of subtropical evergreen plants (Cyclobalanopsis glauca,Ilex chinensis and Loropetalum chinense var. rubrum),always used as urban greening species,were selected to study their capacities in capturing particulate matter. The rinse and weight method were used to characterize PM in different particle size fractions (8-100,2.5-8,0.45-2.5 μm). The results showed that the particulate matters on leaves ranged from 30.4 μg·cm-2 to 63.7 μg·cm-2,while the particles deposited by the whole tree ranged from 1.36 g to 9.36 g. Loropetalum chinense var. rubrum was the most efficient species in capturing particulate matters (63.7±12.0 μg·cm-2) for its rough surfaces and large quantity of hairs on the foliage. All the tested species have the strongest (40.9%-57.5%) and the weakest (15.6%-20.6%) dust-capturing capability for the large size fraction (8-100 μm) and the fine size fraction (0.45-2.5 μm) respectively. As for the total amount of surface particulate matters accumulated by the whole tree, Cyclobalanopsis glauca is the most efficient species (9.36 g per tree) for its spacial characteristics. All the results showed that urban plants played important roles in mitigating urban airborn particulate matters.
- Publication
Guihaia, 2016, Vol 36, Issue 2, p170
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaia.gxzw201505024