Screening Greening Tree Speciesfor Reducing the Combined Air Pollution by Ozone and Particulate Matters
With the accelerating process of industrialization and urbanization,the combined air pollution,such as volatile organic compounds(VOCs),ozone(O3)and particulate matter(PMs),has become the main environmental problem haunting major cities in China,which seriously threatens the services and functions of urban forest ecosystem including carbon sink and air purification.Screening the species with a strong absorption of O3 and PMs and a low release of BVOCs will be the guarantee for maintaining urban forest ecosystem function and human well-being.Based on the published literature,this paper comprehensively analyzes the absorption capacity of O3 and PMs,the release rate of BVOCs and combined effects of 386 common greening tree species using weight assignment and comprehensive factor analysis.The results show that the tree species of Platycladus orientalis,Sabina chinensis and Populus tomentosa have a strong absorption capacity of O3 and PMs and low release rate of BVOCs,which could be promoted in urban greening with strongest tolerance;Juglans regia,Ginkgo biloba and Paulownia fortunei are the tree species with medium absorption capacity of O3 and PMs and high release rate of BVOCs,which are not suitable for use in urban greening.In consideration of the principle of suitable trees for suitable places,more attention would be paid to the landscape layout with urban tree species and the composition and severity of air pollution at the underlying surface in urban greening.Thus,suitable greening species should be selected to maximize the ecological benefits of these species in urban construction.
BVOCsO3PMscombined pollutionurban foresttree species screening
NETL
NSTL
万方数据
