Primary and secondary sources of formaldehyde in urban atmospheres: Houston Texas region

被引：158

作者：

Parrish, D. D. ^{[1
]}

Ryerson, T. B. ^{[1
]}

Mellqvist, J. ^{[2
]}

Johansson, J. ^{[2
]}

Fried, A. ^{[3
]}

Richter, D. ^{[3
]}

Walega, J. G. ^{[3
]}

Washenfelder, R. A. ^{[1
,4
]}

de Gouw, J. A. ^{[1
,4
]}

Peischl, J. ^{[1
,4
]}

Aikin, K. C. ^{[1
,4
]}

McKeen, S. A. ^{[1
,4
]}

Frost, G. J. ^{[1
,4
]}

Fehsenfeld, F. C. ^{[1
,4
]}

Herndon, S. C. ^{[5
]}

机构：

[1] NOAA, ESRL, Div Chem Sci, Boulder, CO USA

[2] Chalmers Univ Technol, S-41296 Gothenburg, Sweden

[3] Natl Ctr Atmospher Res, Earth Observing Lab, Boulder, CO 80307 USA

[4] Univ Colorado, CIRES, Boulder, CO 80309 USA

[5] Aerodyne Res Inc, Billerica, MA USA

来源：

ATMOSPHERIC CHEMISTRY AND PHYSICS | 2012年 / 12卷 / 07期

关键词：

OZONE FORMATION; AIR-QUALITY; STATISTICAL-ANALYSIS; EMISSIONS; NOX; HYDROCARBONS; CARBONYLS; ANALYZER; VOC;

D O I：

10.5194/acp-12-3273-2012

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We evaluate the rates of secondary production and primary emission of formaldehyde (CH2O) from petrochemical industrial facilities and on-road vehicles in the Houston Texas region. This evaluation is based upon ambient measurements collected during field studies in 2000, 2006 and 2009. The predominant CH2O source (92 +/- 4% of total) is secondary production formed during the atmospheric oxidation of highly reactive volatile organic compounds (HRVOCs) emitted from the petrochemical facilities. Smaller contributions are primary emissions from these facilities (4 +/- 2%), and secondary production (similar to 3%) and primary emissions (similar to 1%) from vehicles. The primary emissions from both sectors are well quantified by current emission inventories. Since secondary production dominates, control efforts directed at primary CH2O emissions cannot address the large majority of CH2O sources in the Houston area, although there may still be a role for such efforts. Ongoing efforts to control alkene emissions from the petrochemical facilities, as well as volatile organic compound emissions from the motor vehicle fleet, will effectively reduce the CH2O concentrations in the Houston region. We do not address other emission sectors, such as off-road mobile sources or secondary formation from biogenic hydrocarbons. Previous analyses based on correlations between ambient concentrations of CH2O and various marker species have suggested much larger primary emissions of CH2O, but those results neglect confounding effects of dilution and loss processes, and do not demonstrate the causes of the observed correlations. Similar problems must be suspected in any source apportionment analysis of secondary species based upon correlations of ambient concentrations of pollutants.

引用

页码：3273 / 3288

页数：16

共 53 条

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