10种灌木树种滞留大气颗粒物的能力  

Atmospheric particulates-retaining capacity of ten shrubs species

作　　者：孙晓丹[1] 李海梅[1] 郭霄[1] 孙丽[1] SUN Xiaodan LI Haimei GUO Xiao SUN Li(College of Landscape Architecture and Forestry, Qingdao Agriculture University, Qingdao 266109, Shandong)

机构地区：[1]青岛农业大学园林与林学院,青岛266109

出　　处：《环境工程学报》2017年第2期1047-1054,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(31100512);山东省青年基金资助项目(BS2012NY005);青岛市科技局项目(13-1-4-165-jch)

摘　　要：园林植物能阻滞大气颗粒物,对改善环境污染有重要作用。本研究对青岛市城阳区道路绿地中10种灌木进行了滞尘效益测定,分析了植物叶表面微观结构和叶表面不同粒径颗粒物数量,结果表明:大叶黄杨、火棘、金银木的单位叶面积平均滞尘量较高,紫荆较低;金银木、大叶黄杨的单位体积滞尘量较高,棣棠较低;对叶表面微形态观察表明:叶表粗糙、具蜡质层、气孔开口较大的植物能吸附较多的颗粒物,如大叶黄杨、金银木等;植物叶表面颗粒物大部分是PM_(10)(直径d≤10μm),其数量比例均在80%以上,其中PM_(2.5)(直径d≤2.5μm)达60%以上。Garden plants block atmospheric particles and are important for preventing environmental pollution.In this study,the dust-retention abilities of ten typical shrub varieties in the road greenbelt in the Chengyang district of Qingdao city were analyzed,and the morphological characteristics of the plant leaf surface and the size distributions of the particles on the leaf surface were measured. According to the results,the average contents of retained dust per unit of leaf area was highest for Euonymus japonicus,Pyracantha fortuneana,and Lonicera maackii and lowest for Cercis chinensis. Meanwhile,the average content of retained dust per unit volume was highest for Lonicera maackii and Euonymus japonicus and lowest for Kerria japonica. Observation of the micromorphology of the leaf surface revealed that the plants with rougher leaf surfaces and a wax layer or larger stomata,such as Euonymus japonicus and Lonicera maackii,adsorbed more particles. Finally,80% of the particulates on the leaf surface of the plants were PM_（10）（ diameter≤10 μm）,60% of which were PM_（2.5）（ diameter≤2. 5μm）.

关 键 词：灌木树种 滞尘 叶表面微形态 PM2.5 PM10 

分 类 号：X173[环境科学与工程—环境科学]