Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing.

Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Research Abstract Details 

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Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Abstract Text:

Lei Wang,Lian-you Liu,Shang-yu Gao,Eerdun Hasi,Zhi Wang,

Particulate pollution is a serious health problem throughout the world, exacerbating a wide range of respiratory and vascular illnesses in urban areas. Urban plants play an important role in reducing particulate pollution. Physicochemical characteristics of ambient particles settling upon leaf surfaces of eleven roadside plants at four sites of Beijing were studies. Results showed that density of particles on the leaf surfaces greatly varied with plant species and traffic condition. Fraxinus chinensis, Sophora japonica, A ilanthus altissima, Syringa oblata and Prunus persica had larger densities of particles among the tall species. Due to resuspension of road dust, the densities of particles of Euonymus japonicus and Parthenocissus quinquefolia with low sampling height were 2-35 times to other taller tree species. For test plant species, micro-roughness of leaf surfaces and density of particles showed a close correlation. In general, the larger micro-roughness of leaf surfaces is, the larger density of particles is. Particles settling upon leaf surfaces were dominantly PM, (particulate matter less than 10 microm in aerodynamic diameter; 98.4%) and PM25 (particulate matter less than 2.5 microm in aerodynamic diameter; 64.2%) which were closely relative to human health. Constant elements of particles were C, O, K, Ca, Si, Al, Mg, Na, Fe, S, Cl and minerals with higher content were SiO2, CaCO3, CaMg(CO3)2, NaCI and 2CaSO4 x H20, SiO2. CaCO3 and CaMg(CO3)2 mainly came from resuspension of road dust. 2CaSO4 x H20 was produced by the reaction between CaCO3 derived from earth dust or industrial emission and SO2, H2SO4 or sulfate. NaCl was derived from sea salt.

Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Publishing Authors By Initials

L Wang,LY Liu,SY Gao,E Hasi,Z Wang,

For similar plants: plant components: plant components, aerial: plant leaves research abstracts see: plants: plant components: plant components, aerial: plant leaves research

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Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of environmental sciences (China)

VOLUME: 18

Page Numbers: 921-6

Journal Abbreviation: J Environ Sci (China)

ISSN: 1001-0742

DAY: 8

MONTH: 02

YEAR: 2006

Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 100967627

Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Keywords Mesh Terms:

KEYWORDS: Plant Leaves

MESH TERMS: ultrastructure

Chemical & Substance for Abstract: Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing. Information

Substance Name: Air Pollutants

Registry Number: 0

Grant and Affiliation Information for Physicochemical characteristics of ambient particles settling upon leaf surfaces of urban plants in Beijing.

AFFILIATION: College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China.

Country: Netherlands

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MEDLINETA: J Environ Sci (China)

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