摘要
为研究常见绿化植物吸附大气颗粒物的能力,在南京市城区、城郊区和远郊区选择红叶石楠(Photinia serrulata)、海桐(Pittosporum tobira)、桂花(Osmanthus fragrans)和二球悬铃木(Platanus orientalis)进行研究,测定4种植物叶片吸附大气中不同粒径颗粒物的质量及数量特征。结果表明:植物叶片对不同颗粒物的吸附量存在显著的区域差异和种间差异,区域差异表现为城区>城郊区>远郊区;种间差异表现为二球悬铃木吸附能力最强,红叶石楠和海桐吸附能力相近,桂花吸附能力最弱。植物叶片对不同粒径颗粒物吸附特征为大颗粒物(粒径>10.0μm)质量分数最大,细颗粒物(0.2μm<粒径≤2.5μm)在数量上占一定优势。植物叶片上下表面微结构分析表明,植物叶片上表面吸附颗粒物的能力明显强于下表面,细颗粒物或更小粒径颗粒物主要被吸附在绒毛和深浅不一的沟槽处。
The purpose of this study was to investigate the adsorption ability of greening plant on depositing particles.Photinia serrulata,Pittosporum tobira,Osmanthus fragrans and Platanus orientalis were selected from urban,suburban and rural areas in Nanjing.The mass and number of particulate matter(PM)that captured from atmosphere by four greening plants leaves were measured.The results showed these plants had remarkable spatial and species difference in adsorbing different size PM.The spatial variation of adsorption capacity was shown as urban areas>suburban areas>rural areas.The adsorption capacity of Platanus orientalis to PM was the strongest,followed by Photinia serrulataand Pittosporum tobira,and the adsorption capacity of Osmanthusf ragrans was the weakest.In addition,the large PM(particle size>10.0μm)adsorbed by plant leaves had the largest mass fraction.However,the fine PM(0.2μm<particle size≤2.5μm)had an advantage in quantity.The micromorphology of leaf surface indicated that the upper surface had significantly higher capacity to retain PM than the lower surface,fine or small PM was mainly adsorbed in the villi and irregular grooves.
作者
查燕
马华升
俞祥群
张银龙
ZHA Yan;MA Huasheng;YU Xiangqun;ZHANG Yinlong(Hangzhou Academy of Agricultural Sciences,Hangzhou Zhejiang 310024;Collaborative Innovation Center of Sustainable Forestry in Southern China of Jiangsu Province,Nanjing Forestry University,Nanjing Jiangsu 210037)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2020年第7期807-811,819,共6页
Environmental Pollution & Control
基金
江苏省高校自然科学研究重大项目(No.13KJA180002)
江苏省高校研究生科研创新计划项目(No.KYZZ15-0255)
江苏省高校优势学科建设工程资助项目
南京林业大学优博基金资助项目(No.2149025)。
关键词
植物
颗粒物
叶片微结构
吸附特征
plant
particles
leaf micromorphology
adsorbing characteristic
