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PM10 and PM2.5 Dust-Retention Capacity and Leaf Morphological Characteristics of Landscape Tree Species in the Northwest of Hebei Province

文献类型： 外文期刊

作者： Gao, Zewei 1 ; Qin, Yahang 1 ; Yang, Xinbing 1 ; Chen, Bo 2 ;

作者机构： 1.Hebei Agr Univ, Coll Forestry, Baoding 071001, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Forestry & Pomol, Beijing 100093, Peoples R China

关键词： landscape tree species; leaf dust retention; leaf morphology; PM10 and PM2 5; Zhangjiakou

期刊名称：ATMOSPHERE （ 影响因子：3.11； 五年影响因子：3.222 ）

ISSN：

年卷期： 2022 年 13 卷 10 期

页码：

收录情况： SCI

摘要： This study aimed to explain the reasons for the differences in the PM2.5 and PM10 dust-retention capacity of different tree species. Ten typical landscape tree species with a strong ability to adsorb particulate matter and improve the quality of the atmospheric environment were selected in Zhangjiakou, and the leaves of each tree species were collected from April to October. The PM2.5 and PM10 dust-retention capacity of different tree species were measured using an aerosol regenerator. The differences in the leaf structure of different tree species were analyzed using an electron microscope. The results showed that the PM10 and PM2.5 per unit leaf area of 10 tree species ranged from 1.31 +/- 0.68 to 2.64 +/- 1.29 mu g center dot cm(-2) and from 0.28 +/- 0.13 to 0.99 +/- 0.34 mu g center dot cm(-2), and the PM10 and PM2.5 dust-retention capacity per unit leaf area of coniferous trees was higher than that of broad-leaved trees. Further, the PM10 dust-retention capacity per unit leaf area of each tree species in different months was the highest in October (3.17 +/- 1.12 mu g center dot cm(-2)) and the lowest in August (0.79 +/- 0.56 mu g center dot cm(-2)). The PM2.5 dust-retention capacity per unit leaf area was the highest in October (0.99 +/- 0.34 mu g center dot cm(-2)) and the lowest in April (0.28 +/- 0.13 mu g center dot cm(-2)). The annual PM10 and PM2.5 dust-retention capacity per hectare of Pinus tabulaeformis was the highest and that of Ginkgo biloba was the lowest. The conifer trees have rough leaves, and broad-leaved trees have smooth leaves. The leaves of P. tabulaeformis and Picea asperata have a widespread stomata distribution, and the leaf surface is not smooth, with a large number of grooves and bulges. The number of stomata on the leaf surface of Salix babylonica and G. biloba is less than that of P. tabulaeformis and P. asperata. When the dust-retention capacity of PM2.5 per unit leaf area is high, the corresponding roughness is also significant, and a good logarithmic relationship exists between roughness and PM2.5 per unit leaf area (R-2 = 0.9504). The results of this study might have an important reference value in terms of the selection of tree species with strong PM10 and PM2.5 dust-retention capacity and the improvement in ambient air quality in the northwest of Hebei Province.

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