摘要
为了研究静风、恒温恒湿条件下常绿景观植被对空气中PM_(10)、PM_(2.5)的阻滞作用,在全封闭的1m3室内模拟箱内放入植被,设置对照并监测其中颗粒物质量浓度变化,分析静风条件下8种常绿植被对大气可吸入颗粒物和细颗粒物附着作用差异性和常绿景观植被的空气净化率。结果表明,不同种类常绿景观植被对可吸入颗粒物和细颗粒物阻滞能力存在差异性,8种植被中叶表面附着PM_(10)、PM_(2.5)密度最大的是雪松,分别为0.813μg/cm2和0.689μg/cm2,最小的是大叶黄杨,分别为0.327μg/cm2和0.214μg/cm2。8种常绿景观植被附着PM_(10)、PM_(2.5)能力大小为乔木>灌木,具体为松>杉>柏>青扦>黄杨。8种植被在静风条件下1m3空间中对PM_(10)、PM_(2.5)的阻滞作用存在时间极限,对PM_(10)阻滞作用的时间极限为7~12h,差异性较大,其中时间最短的是雪松和白皮松,最长的是大叶黄杨;对PM_(2.5)阻滞作用的时间极限为12~14h左右,植被间差异性不明显。8种植被对PM_(10)、PM_(2.5)的净化率范围从3%~15%不等,存在较大差异,其规律与植被附着颗粒物能力规律相似。
In order to study the blocking effect of evergreen landscape vegetation on PM_（10） and PM_（2.5）in the air under the condition of calm air,constant temperature and constant humidity,8plant types were placed in indoor simulation boxes（1cubic metre）and the control treatments were also established.Then,the changes of particulate mass concentration in simulation boxes were monitored,and the adhesion effects of 8evergreen plants on inhalable particulate matter and fine particulate matter,as well as the air purification rate of these plants,were analyzed under the condition of clam air.The results showed that different kinds of evergreen landscape vegetation had different abilities of blocking inhalable particulate matter and fine particulate matter.Among8 plants,Cedrus deodara had the largest adhesion densities of PM_（10） and PM_（2.5）on the leaf surface,which were 0.813μg/cm^2 and 0.689μg/cm^2,respectively,while Euonymus japonicas had the lowest adhesion densities,which were 0.327μg/cm^2 and 0.214μg/cm^2,respectively.The adhesion abilities of arbor to PM_（10） were greater than those of shrub.Particularly,the adhesion abilities of 8kinds of evergreen landscape vegetation to PM_（10） listed in the following order：pine〉Chinese fir〉cypress〉Picea wilsonii〉Euonymus japonicas.Under the condition of calm air,there were time limits for 8 plants＇ blocking effects on PM_（10） and PM_（2.5） within a cubic meter of space.The time limits for blocking PM_（10） ranged from 7hours to 12 hours,which were different for 8kinds of plants,with Cedrus deodara and Pinus bungeana having the shortest time limit and Euonymus japonicus having the longest one.The time limits for blocking PM_（2.5） ranged from 12 hours to 14 hours,which did not show obvious difference between vegetation types.The purification rates of 8plant types to PM_（10） and PM_（2.5）ranged from 3% to 15%,which greatly differed between vegetation types and showed similar trends across vegetation types with the adhesi
出处
《水土保持学报》
CSCD
北大核心
2015年第6期160-164,171,共6页
Journal of Soil and Water Conservation
基金
林业公益性行业科研专项(201304301-04)
关键词
可吸入颗粒物
细颗粒物
常绿植被
累计附着量
时间极限
净化率
inhalable particulate matter
fine particulate matter
evergreen vegetation
cumulative amount of adhesion
time limit
purification rate
