重庆市主城区常见乔木树种叶片滞纳空气颗粒物功能研究

Atmospheric Particle Retaining Function of Common Tree Species Leaves in Urban Areas of Chongqing

为了探求重庆市常见乔木树种滞纳空气颗粒物功能,利用空气气溶胶再发生器测定了11种乔木树种单位面积叶片对TSP、PM10和PM2.5的滞纳量。结果表明:11种乔木树种叶片滞纳TSP和PM10的能力都存在显著差异,二球悬铃木、红叶李对TSP和PM10的滞纳能力排在一二名,11种乔木对PM2.5滞纳水平较低,滞纳能力大小不明显;同一树种滞纳TSP量和PM10量在不同地区的大小排序都与环境空气质量呈正相关关系,而PM2.5无此规律;叶片细颗粒物附着量占比很低。

In order to explore the atmospheric particle-retaining function of common trees species in Chongqing, the aerosol generator （QRJZFSQ-I） was used to measure retaining amount of unit leaf area of TSP PM10 and PM2.5 in eleven kinds of tree species. The results showed that： There were significant differences in the TSP-retaining ability and PM10-retaining ability in the leaves of eleven kinds of trees. For TSP and PM10, retaining ability of trees leaf were higher in Platanus acerifolia and Prunus cerasifera than those of other nine species ; Eleven kinds of trees had a low level of retaining amount to PM2.5, and PM2.5-retaining ability was not significant among all tree species; The retaining amounts of TSP and PM10 of the same trees in different areas had a positive correlation with environmental air quality, while the retaining amounts of PM2.5 was not followed law. The proportion of fine particles attached to the leaves was very low.