Temporal variation of carbonyl compound concentrations at a semi-rural site in Denmark

Christensen, C. S.; Skov, Henrik; Nielsen, Torben; Lohse, Christian

doi:10.1016/s1352-2310(99)00297-6

Cited by 68 publications

(46 citation statements)

References 32 publications

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“…[31][32][33] Recent studies conducted in urban areas of Rome, Italy, and at a semirural site in Denmark showed similar seasonal variations in ambient carbonyl concentrations for most of the carbonyl compounds measured in this study, with highest concentrations observed during summer times. 27,34 The exception was formaldehyde in the current study.…”

Section: Resultsmentioning

confidence: 62%

Concentrations and Source Characteristics of Airborne Carbonyl Compounds Measured Outside Urban Residences

Liu

Zhang

Kwon

et al. 2006

Journal of the Air & Waste Management Association

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This paper presents the analysis of ambient air concentrations of 10 carbonyl compounds (aldehydes and ketones) measured in the yards of 87 residences in the city of Elizabeth, NJ, throughout 1999NJ, throughout -2001. Most of these residences were measured twice in different seasons; the sampling duration was 48 hr each time. The authors observed higher concentrations for most of the measured carbonyl compounds on warmer days, reflecting larger contributions of photochemical reactions on warmer days. The estimated contributions of photochemical production varied substantially across the measured carbonyl compounds and could be as high as 60%. Photochemical activity, however, resulted in a net loss for formaldehyde. The authors used stepwise multiple linear regression models to evaluate the impact of traffic sources and meteorological conditions on carbonyl concentrations using the data collected on colder days (with lower photochemical activities). They found that the concentrations of formaldehyde, acetaldehyde, acrolein, propionaldehyde, crotonaldehyde, benzaldehyde, glyoxal, and methylglyoxal significantly decreased with increasing distance between a measured residence and one or more major roadways. They also found significant negative associations between concentrations for most of the measured carbonyl compounds and each of the following meteorological parameters: mixing height, wind speed, and precipitation.

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Section: Resultsmentioning

confidence: 62%

Concentrations and Source Characteristics of Airborne Carbonyl Compounds Measured Outside Urban Residences

Liu

Zhang

Kwon

et al. 2006

Journal of the Air & Waste Management Association

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“…The air inlet was located 5 m above ground level. The atmospheric air samplings at the Center site were collected during summer (January 29-February 14) and winter (July [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]2002). The sampling system was placed 3.0 meters above ground level and 2.5 meters far from the nearest street.…”

Section: Sampling Of Aldehydesmentioning

confidence: 99%

“…These levels are common FA and AA mixing ratios for unpolluted areas, and this is in accordance with published background values. 5,[25][26][27][28] In Table 3 the results are compared with data from other areas.…”

Section: Aldehyde Mixing Ratios At the Farm Site-winter Samplingmentioning

confidence: 99%

Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Pinto¹,

Solci²

2007

J. Braz. Chem. Soc.

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Os níveis ambientais de formaldeído e acetaldeído foram medidos em três locais na cidade de Londrina: na estação central de ônibus urbano, no centro (perfis diurno e noturno) e em área rural, no verão e inverno de 2002. Os aldeídos foram coletados em cartuchos Sep-Pak revestidos com 2,4-DNPH e analisados por CLAE/AFD. Na estação central as razões de mistura de formaldeído e acetaldeído, estiveram, respectivamente, na faixa de 6,17 a 10,43 ppbv e 0,49 a 2,12 ppbv. No centro, durante o verão, os níveis do formaldeído variaram de 2,07 a 5,65 ppbv e do acetaldeído variaram de 1,05 a 5,06 ppbv. Durante o inverno, as concentrações diurnas de formaldeído e acetaldeído foram mais elevadas do que as noturnas. As razões de mistura do formaldeído e acetaldeído variaram de 3,24 a 9,46 ppbv e 2,81 a 10,83 ppbv, respectivamente. Na área rural as razões de mistura de formaldeído e acetaldeído variaram de 0,64 a 1,41 ppbv e 0,10 a 0,87 ppbv, respectivamente. As razões de acetaldeído/formaldeído foram comparadas com valores obtidos em outras cidades brasileiras.Ambiental levels of formaldehyde and acetaldehyde were measured at three sites in the city of Londrina: at the central bus station, downtown (night and day profiles) and in a rural area, during the summer and winter seasons of 2002. Atmospheric aldehydes were collected using C18 Sep-Pak cartridges coated with 2,4-DNPH and analyzed by HPLC-DAD. At the central bus station, the measured mixing atios for formaldehyde and acetaldehyde ranged, respectively, from 6.17 to 10.43 ppbv and from 0.49 to 2.12 ppbv. Downtown, during the summer, formaldehyde levels ranged from 2.07 to 5.65 ppbv, and acetaldehyde levels ranged from 1.05 to 5.06 ppbv. During the winter, the daytime concentrations for formaldehyde and acetaldehyde were higher than nighttime levels. Formaldehyde and acetaldehyde mixing ratios ranged from 3.24 to 9.46 ppbv and from 2.81 to 10.83 ppbv, respectively. At the rural site, formaldehyde and acetaldehyde mixing ratios ranged from 0.64 to 1.41 ppbv and from 0.10 to 0.87 ppbv, respectively. The acetaldehyde/formaldehyde ratios were compared with values from other Brazilian cities.

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“…It is well documented that atmospheric carbonyls derive from both biogenic (vegetation) and anthropogenic sources (incomplete combustion of biomass and fossil fuels), including direct emission and secondary formation via photochemical conversion of volatile organic compounds (VOCs) emitted from both sources (Bakeas et al 2003;Christensen et al 2000;Ho et al 2002;Nguyen et al 2001;Possanzini et al 2002). Some carbonyls are associated with adverse health impacts and most of them are precursors for radical and photooxidant formation in the atmosphere (Seinfeld and Pandis 1997;Possanzini et al 2002).…”

Section: Introductionmentioning

confidence: 99%

Seasonal, diurnal and nocturnal variations of carbonyl compounds in the semi-urban environment of Orléans, France

Jiang

Grosselin

Daële

et al. 2016

Journal of Environmental Sciences

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Temporal variation of carbonyl compound concentrations at a semi-rural site in Denmark

Cited by 68 publications

References 32 publications

Concentrations and Source Characteristics of Airborne Carbonyl Compounds Measured Outside Urban Residences

Concentrations and Source Characteristics of Airborne Carbonyl Compounds Measured Outside Urban Residences

Comparison of rural and urban atmospheric aldehydes in Londrina, Brazil

Seasonal, diurnal and nocturnal variations of carbonyl compounds in the semi-urban environment of Orléans, France

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