College of Resources and Environment, Shanxi Agricultural University, Taigu, People's Republic of China.
Institute of Desert Meteorology, China Meteorological Administration, Urumqi, People's Republic of China.
Environ Technol. 2024 Jan;45(1):108-119. doi: 10.1080/09593330.2022.2100281. Epub 2022 Jul 20.
Plant leaves can retain atmospheric particulate matter (PM) and thus alleviate air pollution. Herein, four plant species (, , , and ) from the central part of Shanxi Province, China, were investigated to analyse the dynamic changes in their PM retention capacity and grain size over five periods. The relationship between leaf morphological characteristics (leaf size and leaf surface microstructure) and dynamic changes were discussed in PM retention, revealing the influence of leaf morphological characteristics on the amount of PM retention and its composition. The results showed that amount and grain sizes of the retained PM differed significantly among the various studied species; however, the trends in PM retention of different species in the time series were the same. The grain size distributions of PM from the four species displayed a bimodal distribution, in which the main peak distribution range was 5-60 μm and the secondary peak distribution range was 0.4-1 μm. Leaves of smaller sizes and those with rough surfaces had a high PM retention capacity. Leaves with deep grooves are conductive to retaining PM and PM, while leaves with hair are conductive to retaining PM. Therefore, the morphological characteristics of leaves should be considered when selecting the use of plant species to alleviate air pollution. Dynamics of PM retention capacity and grain size distributions of four plant species were analysed.Grain size distributions of PM retained on leaves had a bimodal distribution.Small leaves with grooves or hair are conductive to PM retention.Grooves are conductive to fine PM retention while hairs are conductive to coarse PM retention.
植物叶片可以截留大气颗粒物（PM），从而缓解空气污染。本研究选择了中国山西省中部的 4 种植物（、、、），分析了它们在 5 个时期内 PM 截留能力和粒径的动态变化。探讨了叶片形态特征（叶面积和叶片表面微观结构）与 PM 截留之间的关系，揭示了叶片形态特征对 PM 截留量及其组成的影响。结果表明，不同研究物种之间截留的 PM 量和粒径差异显著；然而，不同物种在时间序列中的 PM 截留趋势是相同的。4 种植物的 PM 粒径分布呈双峰分布，主要峰值分布范围为 5-60 μm，次峰值分布范围为 0.4-1 μm。叶片面积较小、表面粗糙的叶片具有较高的 PM 截留能力。叶片上的深槽有利于截留 PM 和 PM，而叶片上的绒毛有利于截留 PM。因此，在选择缓解空气污染的植物物种时，应考虑叶片的形态特征。分析了 4 种植物的 PM 截留能力和粒径分布动态。叶片截留 PM 的粒径分布呈双峰分布。具有凹槽或绒毛的小叶片有利于 PM 截留。凹槽有利于细 PM 的截留，而绒毛有利于粗 PM 的截留。
