DOI: 10.1016/j.atmosenv.2014.02.014
Scopus记录号: 2-s2.0-84896837512
论文题名: Diurnal and seasonal trends of carbonyl compounds in roadside, urban, and suburban environment of Hong Kong
作者: Cheng Y ; , Lee S ; C ; , Huang Y ; , Ho K ; F ; , Ho S ; S ; H ; , Yau P ; S ; , Louie P ; K ; K ; , Zhang R ; J
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 89 起始页码: 43
结束页码: 51
语种: 英语
英文关键词: Carbonyls
; Diurnal variations
; Seasonal variations
Scopus关键词: Carbonyls
; Diurnal variation
; Good correlations
; Maximum concentrations
; Seasonal and diurnal variations
; Seasonal variation
; Surrounding environment
; Vehicular emission
; Carbon monoxide
; Carbonyl compounds
; Photochemical reactions
; Roadsides
; 2 butanone
; acetaldehyde
; acetone
; acrolein
; benzaldehyde
; carbon monoxide
; carbonyl derivative
; crotonaldehyde
; formaldehyde
; hexanal
; isovaleraldehyde
; nitric oxide
; ozone
; pentanal
; propionaldehyde
; unclassified drug
; atmospheric pollution
; carbon monoxide
; carbonyl compound
; correlation
; diurnal variation
; emission
; formaldehyde
; ozone
; pollutant source
; roadside environment
; seasonal variation
; suburban area
; article
; autumn
; circadian rhythm
; Hong Kong
; humidity
; photochemistry
; priority journal
; seasonal variation
; spring
; suburban area
; summer
; temperature
; urban area
; winter
; China
; Hong Kong
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Seasonal and diurnal variations of carbonyl compounds were investigated in roadside (MK), urban (TW), and suburban (UST) environments in Hong Kong. Thirteen carbonyls (C1-C6) were identified and quantified in the samples. The average total quantified carbonyl concentrations decreased in the order of roadside (12.16±3.52μgm-3), urban (10.45±4.82μgm-3), and suburban (5.14±3.35μgm-3). Formaldehyde was the most abundant species, accounting for ~52%, ~52%, and ~46% of total measured carbonyls at MK, TW, and UST, respectively. At MK, the summer/winter ratios of most carbonyls were below one. The diurnal variations were associated with traffic flows, with high concentrations in daytime but low in nighttime. Good correlations were found between most carbonyls and carbon monoxide (CO), showing primary vehicular emission was the major source at the roadside location. In contrast, the summer/winter ratios of most carbonyls were larger than one at the urban site of TW and their carbonyls correlated well with secondary pollutant of ozone (O3), indicating photochemical reactions contributed significantly in the formation of carbonyls, especially in summer. Distinct diurnal variations of carbonyls were observed at TW on a hazy winter day of 28 Jan 2012. Most carbonyl concentrations reached the first peak at noontime and had the second peak in the evening. The first peak was ascribed to be the products of photochemical reactions as maximum concentrations of nitrogen monoxide (NO) and O3 occurred just before and after the carbonyl peak, respectively. The correlations among the carbonyl species were strong in summer but fair in winter at UST. Natural sources (e.g. biogenic) were usually the major source at the suburban, as far as its surrounding environment is concerned. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/80676
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, No. 28 Xianning West Road, Xi'an, Shaanxi 710049, China; SKLLQG, Institute of Earth and Environment, CAS, Xi'an, Shaanxi 710075, China; Department of Civil and Environmental Engineering, Research Center for Environmental Technology and Management, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong; Division of Atmospheric Sciences, Desert Research Institute, 2215 Raggio Pathway, Reno, NV 89512, United States; Hong Kong Environmental Protection Department, 47/F, Revenue Tower, 5 Gloucester Road, Wan Chai, Hong Kong; Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Recommended Citation:
Cheng Y,, Lee S,C,et al. Diurnal and seasonal trends of carbonyl compounds in roadside, urban, and suburban environment of Hong Kong[J]. Atmospheric Environment,2014-01-01,89