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	植物叶片吸滞PM_(2.5)等大气颗粒物定量研究方法初探——以毛白杨为例
	张志丹 ; 席本野 ; 曹治国 ; 贾黎明 ; ZHANG Zhi-dan ; XI Ben-ye ; CAO Zhi-guo ; JIA Li-ming
	2016-03-30 ; 2016-03-30
关键词	PM2.5 大气颗粒物 激光粒度仪 毛白杨 洗脱称量粒度分析法 PM2.5 atmospheric particulate matter laser particle size analyzer Populus tomento-sa elution-weighing-particle size-analysis(EWPA). S792.117
其他题名	Exploration of a quantitative methodology to characterize the retention of PM_(2. 5) and other atmospheric particulate matter by plant leaves: Taking Populus tomentosa as an example
中文摘要	以毛白杨为例,提出一种利用激光粒度仪和天平定量评估植物叶片吸滞细颗粒物(PM2.5,直径d≤2.5μm)等大气颗粒物能力的方法——洗脱称量粒度分析法(EWPA),实现了对植物叶片吸滞大气颗粒物质量和粒径分布的直接、准确测定,可操作性强.首先,进行预试验对试验方法的稳定性进行检验;其次,通过对叶片进行清洗、离心洗液、烘干等步骤收集其吸滞的颗粒物,然后对颗粒物称量,并采用激光粒度仪测定颗粒物的粒径分布;最后,利用叶面积和林分叶面积指数数据换算得到单位面积叶片和林分的各径级颗粒物吸滞量.在北京市奥林匹克森林公园内一片毛白杨林分(27 d未经历降雨)中应用该法,测得毛白杨叶片吸滞大气颗粒物的粒径均值为17.8μm,吸滞PM2.5、可吸入颗粒物(PM10,d≤10μm)和总悬浮颗粒物(TSP,d≤100μm)的体积百分比分别为13.7%、47.2%和99.9%;叶片的PM2.5、PM10、TSP和总颗粒物吸滞量分别为8.88×10-6、30.6×10-6、64.7×10-6和64.8×10-6g·cm-2;林分的PM2.5、PM10、TSP和总颗粒物吸滞量分别为0.963、3.32、7.01和7.02 kg·hm-2.; Taking Populus tomentosa as an example,a methodology called elution-weighing-particle size-analysis(EWPA) was proposed to evaluate quantitatively the ability of retaining fine particulate matter(PM2. 5,diameter d≤2.5 μm) and atmospheric particulate matter by plant leaves using laser particle size analyzer and balance. This method achieved a direct,accurate measurement with superior operability about the quality and particle size distribution of atmospheric particulate matter retained by plant leaves. First,a pre-experiment was taken to test the stability of the method. After cleaning,centrifugation and drying,the particulate matter was collected and weighed,and then its particle size distribution was analyzed by laser particle size analyzer. Finally,the mass of particulate matter retained by unit area of leaf and stand was translated from the leaf area and leaf area index. This method was applied to a P. tomentosa stand which had not experienced rain for 27 days in Beijing Olympic Forest Park. The results showed that the average particle size of the atmospheric particulate matter retained by P. tomentosa was 17. 8 μm,and the volume percentages of the retained PM2. 5,inhalable particulate matter(PM10,d≤10 μm) and total suspended particle(TSP,d≤100 μm) were 13. 7%,47. 2%,and 99. 9%,respectively. The masses of PM2. 5,PM10,TSP and total particulate matter were 8. 88 × 10- 6,30. 6 × 10- 6,64. 7 × 10- 6and 64. 8 × 10- 6g·cm- 2,respectively. The retention quantities of PM2. 5,PM10,TSP and total particulate matter by the P. tomentosa stand were 0. 963,3. 32,7. 01 and 7. 02 kg·hm- 2,respectively.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144248]
专题	清华大学
推荐引用方式 GB/T 7714	张志丹,席本野,曹治国,等. 植物叶片吸滞PM_(2.5)等大气颗粒物定量研究方法初探——以毛白杨为例[J],2016, 2016.
APA	张志丹.,席本野.,曹治国.,贾黎明.,ZHANG Zhi-dan.,...&JIA Li-ming.(2016).植物叶片吸滞PM_(2.5)等大气颗粒物定量研究方法初探——以毛白杨为例..
MLA	张志丹,et al."植物叶片吸滞PM_(2.5)等大气颗粒物定量研究方法初探——以毛白杨为例".(2016).

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