Evaluation of air-cleaning efficiency and Emissior rate of bioge
「Evaluation of air-cleaning efficiency and Emissior rate of bioge」於資料集「EPQSummary_ChemicalSubstanceManagement」由單位「行政院環境保護署」的陳先生所提供，聯繫電話是02-2311-7722#2386，最近更新時間為：2023-07-30 01:01:48。 欄位Project Title的內容是Evaluation of air-cleaning efficiency and Emissior rate of biogenic volatile organic compounds by trees ， 欄位Project Subject的內容是This project is to evaluate the air-cleaning efficiency of common tree species in Taiwan and to measure the isoprene emission rates of them. Since isoprene may react actively with nitrogen oxides to produce ozone in urban atmosphere, the urban trees with high isoprene emission rate have recently obtained great concerns in Taiwan. A branch enclosure method was used to measure the ozone and nitrogen dioxide absorption rates of 10 tree species in urban parks. Results showed that there was a cleaning efficiency of 2-15% for most of the trees. However this method showed a disadvantage of large variation in wind speed and ambient polluatnt concentration, causing the difficulty in explaining of the results. A PP plastic bag enclosure method was then developed to measure the ozone absorption rates of 20 tree species. Results showed that Taiwan acacia, pudding-pipe tree, camphor tree, Taiwan Zelkova and Chinese pistache have higher ozone absorption rates. A PP plastic bag enclosure method in combination with a GC-FID instrument installed with a Se-30 packing column was used to quickly detect the isoprene emission rates. Totally 33 popular tree species were screened in the first stage in 2003. Among them eight species were found to be isoprene emitters. They are mango, Formosan sweet gum (Liquidambar formosana), sisso tree (Dalbergia sissoo), white bark fig (Ficus benjamina), rubber plant (Ficus elastica), poongaoil (Pongamia pinnata), Ceylon olive (Elaeocarpus serratus), and Hong kong Orhid tree (Bauhinia blakeana). The results suggest that these species should be avoided or limited in urban reforestation, although there is no direct evidence showing that the emitted isoprene is the principal precursor responsible for the raised ozone level in four urban areas in Taiwan. ， 欄位Project Year的內容是2003 ， 欄位Organizer的內容是Department of Air Quality Protection ＆amp; Noise Control ， 欄位Executive Unit的內容是國立台灣大學植物病理與微生物學系 ， 欄位Reporting download URL的內容是https://epq.epa.gov.tw/ProjectDoc/FileDownload?fid=2738&proj_id=A000000334948&doc_kind=1 ， 欄位Publish Date的內容是20040901 。
Project Title
Evaluation of air-cleaning efficiency and Emissior rate of biogenic volatile organic compounds by trees
Project Subject
This project is to evaluate the air-cleaning efficiency of common tree species in Taiwan and to measure the isoprene emission rates of them. Since isoprene may react actively with nitrogen oxides to produce ozone in urban atmosphere, the urban trees with high isoprene emission rate have recently obtained great concerns in Taiwan. A branch enclosure method was used to measure the ozone and nitrogen dioxide absorption rates of 10 tree species in urban parks. Results showed that there was a cleaning efficiency of 2-15% for most of the trees. However this method showed a disadvantage of large variation in wind speed and ambient polluatnt concentration, causing the difficulty in explaining of the results. A PP plastic bag enclosure method was then developed to measure the ozone absorption rates of 20 tree species. Results showed that Taiwan acacia, pudding-pipe tree, camphor tree, Taiwan Zelkova and Chinese pistache have higher ozone absorption rates. A PP plastic bag enclosure method in combination with a GC-FID instrument installed with a Se-30 packing column was used to quickly detect the isoprene emission rates. Totally 33 popular tree species were screened in the first stage in 2003. Among them eight species were found to be isoprene emitters. They are mango, Formosan sweet gum (Liquidambar formosana), sisso tree (Dalbergia sissoo), white bark fig (Ficus benjamina), rubber plant (Ficus elastica), poongaoil (Pongamia pinnata), Ceylon olive (Elaeocarpus serratus), and Hong kong Orhid tree (Bauhinia blakeana). The results suggest that these species should be avoided or limited in urban reforestation, although there is no direct evidence showing that the emitted isoprene is the principal precursor responsible for the raised ozone level in four urban areas in Taiwan.
Project Year
2003
Organizer
Department of Air Quality Protection ＆amp; Noise Control
Executive Unit
國立台灣大學植物病理與微生物學系
Reporting download URL
https://epq.epa.gov.tw/ProjectDoc/FileDownload?fid=2738&proj_id=A000000334948&doc_kind=1
Publish Date
20040901
「Evaluation of air-cleaning efficiency and Emissior rate of bioge」所屬的資料集：「EPQSummary_ChemicalSubstanceManagement」的其他資料
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