| 北京10个常绿树种颗粒物吸附能力研究 |
| 摘要点击 2378 全文点击 1465 投稿时间：2014-07-29 修订日期：2014-09-24 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 颗粒物 常绿树种 总悬浮颗粒物 PM10 PM2.5 吸附能力 北京 |
| 英文关键词 particulate matter evergreen tree species TSP PM10 PM2.5 adsorption capacity Beijing |
|
| 中文摘要 |
| 大气中颗粒物PM(particulate matter)不仅造成环境污染,还对人体造成严重的危害. 城市绿色植物作为大气过滤器,能够有效地提高城市空气质量,保护人体健康. 因此了解不同树种对空气颗粒物的吸附滞纳作用是必要的. 以北京植物园10种常绿植被为研究对象,应用空气气溶胶再发生器(QRJZFSQ-I)测定了北京市常见6种乔木和4种灌木叶片对空气总悬浮颗粒物(TSP)、PM10、PM2.5和PM1.0的吸附能力. 结果表明:1不同树种叶片表面附着颗粒物的能力差异明显,最高的是雪松(Cedrus deodara)和油松(Pinus tabuliformis),吸附量分别是(18.95±0.71) μg·cm-2和(14.61±0.78) μg·cm-2,冷杉(Abies fabri)最小,为(8.02±0.4) μg·cm-2; 2不同树种叶片单位面积对不同颗粒物的附着能力也存在差异,附着PM10能力最强的是油松和雪松,附着PM2.5能力最强的是雪松、铺地柏(Juniperus procumbens)、龙柏(Juniperus chinensis cv. kaizuka)和油松,附着PM1.0能力最强的是雪松、铺地柏、冷杉和油松; 3不同月份叶片上附着的各粒级颗粒物(PM10、PM2.5)占TSP的比例不同. 其中PM10在4~6月之间主要表现两种变化趋势,一是先上升后下降,主要为灌木树种; 二是逐渐上升,主要的树种是乔木树种. 而PM2.5则没有这种明显的变化趋势. |
| 英文摘要 |
| In the atmosphere, high concentrations of air particles PM (Particulate matter) cause not only environmental pollution, but also serious harm to human body. Green plants as an air filter, can effectively improve the air quality in urban and suburb, and protect human health. Therefore, it is necessary to understand the adsorption capacity of air particulate matter of different species. Based on aerosol generator (QRJZFSQ-I), the leaf surface of ten plants including six evergreen trees and four evergreen shrubs were measured to determine the atmosphere adsorption (TSP, PM10, PM2.5 and PM1.0) capacity in Beijing, the results showed that:① There was obvious difference in the PM adsorption capacity of the leaf surface of different species, the highest were Cedrus deodara and Pinus tabuliformis, which were (18.95±0.71) μg·cm-2 and (14.61±0.78) μg·cm-2 respectively, while Abies fabri was the minimum, which was (8.02±0.4) μg·cm-2; ② There was also difference in the per unit leaf area particulate adhesion ability among different tree species, the tree species with the strongest leaf PM10 adhesion ability were Pinus tabuliformis and Cedrus deodara, those with the strongest leaf PM2.5 adhesion ability were Cedrus deodara,Juniperus procumbens,Juniperus chinensis cv. kaizuka and Pinus tabuliformis, while those with the strongest leaf PM1.0 adhesion ability were Cedrus deodara, Juniperus procumbens, Abies fabri and Pinus tabuliformis; ③ The proportions of particulate matters (PM10 and PM2.5) in TSP were different. PM10 had mainly two kinds of trends in April-June, one was firstly decreasing and then increasing, with the main tree type of the shrub species; and the other was increasing, with the main tree type of the tree species. But this change trend was not obvious in PM2.5. |
|
|
|
