Retention and resuspension of atmospheric particles with two common urban greening trees

Ying yong sheng tai xue bao = The journal of applied ecology
Guan Hao QiaoPeng Li

Abstract

The purification mechanisms of plant leaves with atmospheric particles include adsorption, resuspension, rainwater leaching and absorption. However, few studies focused on the resuspension process of atmospheric particles suspending on the surface of leaves, and the correlation between content of adsorbed particles and content of elements in the leaves. Therefore, two common greening tree species, Platanus acerifolia and Magnolia grandiflora, were selected to analyze the atmospheric particles contents on the leaf surface, the leaf mineral element content, and the resuspension ratios. The results showed that the adsorption capacity of P. acerifolia (4.98 g·m-2) was higher than that of M. grandiflora (2.65 g·m-2), which might be connected with rough leaves and dense hairs. The selected 15 elements were all detected by ICP on the leaf surface and in the leaves of two species. In general, the elemental values of the leaf surface were positively related with those in the leaves. However, the two plants showed different selective absorption capacities because positive relation between element adsorption and absorption was only found for Cr, Fe and V for P. ace-rifolia, while such relation was only not found for K, Mn, Si, Ti and Zn f...Continue Reading

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