On-road emissions of carbonyls from light-duty and heavy-duty vehicles

Article Abstract:

Airborne carbonyl emissions of light-duty and heavy-duty vehicles are measured using silica gel cartridges at the Tuscarora Mountain Tunnel in Pennsylvania. Accompanying graphs and charts provide additional statistical data.

United States, Motor vehicles and car bodies, Science & research, Automobiles, Automobile Manufacturing, Ecological Sciences, Pennsylvania, Statistical Data Included, Testing, Environmental sciences

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C1-C14 carbonyls in Los Angeles air

Article Abstract:

Ambient concentrations of carbonyls in the range C1-C14 were measured at different locations in Los Angeles, CA, during the 1993 smog season. A total of 23 carbonyls were positively identified and 19 were tentatively identified. The average ambient carbonyl concentration was 22 ppb, with the highest concentration at Azusa, CA, at 29 ppb. The most abundant carbonyls were formaldehyde, acetaldehyde and acetone, which accounted for 24%, 18% and 7% of total carbonyl concentrations, respectively.

Measurement, Environmental aspects, Pollution, Los Angeles, California, Organic compounds, Air quality

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Ambient concentrations, sources, emission rates, and photochemical reactivity of C2-C10 hydrocarbons in porto Alegre, Brazil

Article Abstract:

The ambient concentrations of 66 C2-C10 hydrocarbons were investigated for one whole year in Porto Alegre, Brazil. The ten most abundant hydrocarbons detected on a mass concentrations basis were acetylene, ethylene, propane, toluene, isopentane, (M+p)-zylene, propene, n-butane, benzene and n-pentane. The contribution of gasoline and methyl tert-butyl ether (MTBE)-fueled vehicles to photochemical air pollution in Porto Alegre could prove more significant than indicated by OH reaction and O3 production rankings of MTBE.

Industrial Organic Chemicals, Air Pollution Control R&D, Cyclic Crude and Intermediate Manufacturing, Aromatic Hydrocarbons, Brazil, Air pollution research, Pollution control research, Hydrocarbon research

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