Roadside BTEX and other gaseous air pollutants in relation to emission sources

Roadside BTEX and other gaseous air pollutants in relation to emission sources

Hourly concentrations of benzene, toluene, ethylbenzene, m, p-xylenes, and o-xylene (BTEX) plus CO, NO x , SO 2 were monitored at roadsides simultaneously with the traffic volume during the dry season of 2004, in Hanoi, Vietnam. The selected three streets included Truong Chinh (TC) with high traffic...

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Bibliographic Details
Published in:Atmospheric environment (1994) Vol. 41; no. 36; pp. 7685 - 7697
Main Authors: Truc, Vo Thi Quynh, Kim Oanh, Nguyen Thi
Format: Journal Article
Language:English
Published: Oxford Elsevier Ltd 01-11-2007
Elsevier Science
Subjects:
Applied sciences
Atmospheric pollution
BTEX
Exact sciences and technology
Gaseous pollutants
Hanoi
Pollution
Pollution sources. Measurement results
Principal component analysis
Roadside
Traffic pattern
Transports
Asia
Vietnam
Vietnam, Hanoi
Traffic pattern
BTEX
Hanoi
Roadside
Gaseous pollutants
Principal component analysis
Daily variation
Motor vehicle
Urban area
Traffic load
Spatial variation
Sulfur dioxide
Road side
2004
Aromatic compound
Carbon monoxide
Day to day variation
Organic compounds
Nitrogen oxide
Hydrocarbon
Air quality
Volatile organic compound
Urban atmosphere
BTEX compound
Dry season
Air pollution
Road traffic
Concentration distribution
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Summary:Hourly concentrations of benzene, toluene, ethylbenzene, m, p-xylenes, and o-xylene (BTEX) plus CO, NO x , SO 2 were monitored at roadsides simultaneously with the traffic volume during the dry season of 2004, in Hanoi, Vietnam. The selected three streets included Truong Chinh (TC) with high traffic volume, Dien Bien Phu (DBP) with low traffic volume, and Nguyen Trai (NT) with high traffic volume running through an industrial estate. BTEX were sampled by SKC charcoal tubes and analyzed by GC–FID. Geometric means of hourly benzene, toluene, ethylbenzene, m, p-xylenes and o-xylene are, respectively, 65, 62, 15, 43, and 22 μg m −3 in TC street; 30, 38, 9, 26, and 13 μg m −3 in DBP street; and 123, 87, 24, 56, and 30 μg m −3 in NT street. Levels of other gaseous pollutants including CO, NO x , and SO 2, measured by automatic instruments, were low and not exceeding the Vietnam national ambient air quality standards. BTEX levels were comparatively analyzed for different downwind distances (3–50 m) from the street, between peak hours and off-peak hours, as well as between weekdays and weekend. Results of principal component analysis suggest that the gaseous pollutants are associated with different vehicle types.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2007.06.003