IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air
Lui, K. H.1; Ho, Steven Sai Hang2,3; Louie, Peter K. K.4; Chan, C. S.1; Lee, S. C.5; Hu, Di6; Chan, P. W.7; Lee, Jeffrey Chi Wai7; Ho, K. F.1
2017-03-01
Source PublicationATMOSPHERIC ENVIRONMENT
Volume152Issue:2017Pages:51-60
SubtypeArticle
AbstractGas-phase formaldehyde (HCHO) is an intermediate and a sensitive indicator for volatile organic compounds (VOCs) oxidation, which drives tropospheric ozone production. Effective photochemical pollution control strategies demand a thorough understanding of photochemical oxidation precursors, making differentiation between sources of primary and secondary generated HCHO inevitable. Spatial and seasonal variations of airborne carbonyls based on two years of measurements (2012-2013), coupled with a correlation-based HCHO source apportionment analysis, were determined for three sampling locations in Hong Kong (denoted HT, TC, and YL). Formaldehyde and acetaldehyde were the two most abundant compounds of the total quantified carbonyls. Pearson's correlation analysis (r > 0.7) implies that formaldehyde and acetaldehyde possibly share similar sources. The total carbonyl concentration trends (HT < TC < YL) reflect location characteristics (urban > rural). A regression analysis further quantifies the relative primary HCHO source contributions at HT (similar to 13%), TC (similar to 21%), and YL (similar to 40%), showing more direct vehicular emissions in urban than rural areas. Relative secondary source contributions at YL (similar to 36%) and TC (similar to 31%) resemble each other, implying similar urban source contributions. Relative background source contributions at TC could be due to a closed structure microenvironment that favors the trapping of HCHO. Comparable seasonal differences are observed at all stations. The results of this study will aid in the development of a new regional ozone (O-3) control policy, as ambient HCHO can enhance O-3 production and also be produced from atmospheric VOCs oxidation (secondary HCHO). (C) 2016 Elsevier Ltd. All rights reserved.
KeywordCarbonyl Seasonal Variation Source Apportionment Analysis Ambient Air Correlation Analysis
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2016.12.004
WOS KeywordHONG-KONG ; STATISTICAL-ANALYSIS ; VEHICLE EMISSIONS ; URBAN ; ENVIRONMENT ; ROADSIDE ; HOUSTON ; ACETALDEHYDE ; TROPOSPHERE ; ATMOSPHERE
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS SubjectEnvironmental Sciences ; Meteorology & Atmospheric Sciences
WOS IDWOS:000394400000006
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5505
Collection黄土与第四纪地质国家重点实验室(2010~)
Affiliation1.Chinese Univ Hong Kong, Jockey Club Sch Publ Hlth & Primary Care, Hong Kong, Hong Kong, Peoples R China
2.Chinese Acad Sci, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710075, Peoples R China
3.Desert Res Inst, Div Atmospher Sci, Reno, NV 89512 USA
4.Hong Kong Environm Protect Dept, 33-F,Revenue Tower,5 Gloucester Rd, Wan Chai, Hong Kong, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Struct Engn, Res Ctr Urban Environm Technol & Management, Hong Kong, Hong Kong, Peoples R China
6.Hong Kong Baptist Univ, Dept Chem, Kowloon, Hong Kong, Peoples R China
7.Hong Kong Observ, 134A Nathan Rd, Kowloon, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Lui, K. H.,Ho, Steven Sai Hang,Louie, Peter K. K.,et al. Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air[J]. ATMOSPHERIC ENVIRONMENT,2017,152(2017):51-60.
APA Lui, K. H..,Ho, Steven Sai Hang.,Louie, Peter K. K..,Chan, C. S..,Lee, S. C..,...&Ho, K. F..(2017).Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air.ATMOSPHERIC ENVIRONMENT,152(2017),51-60.
MLA Lui, K. H.,et al."Seasonal behavior of carbonyls and source characterization of formaldehyde (HCHO) in ambient air".ATMOSPHERIC ENVIRONMENT 152.2017(2017):51-60.
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