Ubiquitous occurrence of semi-volatile carbonyl compounds in tropospheric samples and their possible sources |
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| Institution: | 1. Institute of Chemical Methodologies of CNR (IMC), Research Area of Rome 1, Via Salaria Km 29,300, 00015 Monterotondo, Rome, Italy;2. Institute of Agro-Environmental and Forest Biology of CNR (IBAF), Research Area of Rome 1, Via Salaria Km 29,300, 00015 Monterotondo, Rome, Italy;1. Molecular Science and Nano-Materials Lab, Institute for Computational Science and Technology, SBI Building, Quang Trung Software City, Tan Chanh Hiep Ward, District 12, Ho Chi Minh City, Viet Nam;2. University of Science, Vietnam National University – HCMC, 227 Nguyen Van Cu, Ward 4, District 5, Ho Chi Minh City, Viet Nam;3. International University, Vietnam National University – HCMC, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam;1. College of Horticulture and Landscape, Hunan Agricultural University, 410128 Changsha, China;2. Institute of Horticulture, Hunan Academy of Agricultural Science, 410125 Changsha, China;3. Dipartamento di Scienzedelle Produzioni Agrariee Alimentari, University of Catania, 95123 Catania, Italy;4. Institute of Citrus Science, Xiangxi Autonomous Prefecture, 416000 Jishou, China;5. Institute of Citrus Science, Luxi County, 416100 Luxi, China |
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| Abstract: | The levels of semi-volatile aldehydes with 4–10 carbon atoms and a ketone identified as 6-methyl-5-hepten-2-one by mass spectrometry have been measured in some urban, suburban and forest areas together with important hydrocarbons emitted by man-made (benzene, toluene) and biogenic sources (α-pinene). The results obtained show the ubiquitous occurrence of these carbonyl compounds in the atmospheric environment. Diurnal profiles obtained at various sites and a vertical gradient measured in a pine forest seem to be consistent with their natural origin. Direct emission from plants seems to be a major source for these components in the atmospheric boundary layer. The levels measured indicate that they are among the most abundant gaseous organic components present in natural environments. |
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