【摘要】 植物叶片作为空气中颗粒物的天然受体，可以将大气颗粒物滞纳在其表面，从而达到净化大气的目的。针对测定野外条件下植物叶片上颗粒污染物(PM_2.5)的干沉降速率问题，研制一台人工气溶胶烟雾箱，并建立一个简单有效的方法评价不同植物滞纳PM_2.5的能力。以此设备测定龙柏、水杉、樟树、悬铃木4种植物叶片在生长季PM_2.5干沉降速率。结果表明：4种植物叶片的PM_2.5沉降速率由大到小的顺序为：龙柏>悬铃木>水杉>樟树。更多还原

【Abstract】 Plant leaves, as natural receptors of airborne particles, can retain particles onto their surfaces to purify the air. Dry deposition is considered the main process for particle removal from the atmosphere, and its velocity（v_d） is a crucial parameter for describing the process. In view of the problem that the current method cannot accurately measure the dry deposition rate of PM_2.5 on plant leaves under actual field conditions, an artificial aerosol climate box is developed and a simpler and more effective method is designed to evaluate the adsorption capacity of PM_2.5 capability in different plants. Sabina chinensis, metasequoia glyptostroboides, cinnamomum camphora, platanus acerifolia are measured by this equipment. The results has shown that sabina chinensis is significantly higher than that of other trees, PM_2.5 dry deposition velocity of 4 species from high to low are sabina chinensis, cinnamomum camphora, metasequoia glyptostroboides, platanus acerifolia.更多还原