Halogenated aromatic compounds in automotive emissions from leaded gasoline additives
Brominated/chlorinated aromatic compounds were identified in automotive emissions from leaded gasoline containing dibromo- and dichloroethane (DBE and DCE). The predominantly brominated aromatic compounds found were phenols, alkylphenols (ring brominated), and alkylbenzenes (side chain brominated). The major compounds were 2-mono-, 2,4-di-, 2,6-di, and 2,4,6-tribromophenol, monobromo- and dibromomethylphenol, ..cap alpha..-bromotoluene, ..cap alpha..-bromoxylenes, and (bromomethyl)dimethylbenzenes, and smaller amounts of mixed brominated/chlorinated analogues; the total concentration of these halogenated compounds was more than 25 ..mu..f/m/sup 3/ of exhaust. These compounds were not present in exhaust from unleaded gasoline and arise from the DBE and DCE scavenger additives in premium gasoline, presumably via radical halogenation during or after combustion of fuel in the engine. The preliminary results from these experiments under idling motor conditions indicate conversion of these additives to halogenated aromatic compounds at around 0.1-0.2%. With DCE and DBE both present in gasoline, the conversion to brominated aromatic compounds largely exceeds that to chlorinated compounds. 2,4,6-Tribromophenol and other halogenated compounds were also detected on snow collected near a motorway.
- Research Organization:
- Swiss Federal Research Station, Waedenswil
- OSTI ID:
- 6940281
- Journal Information:
- Environ. Sci. Technol.; (United States), Vol. 20:11
- Country of Publication:
- United States
- Language:
- English
Similar Records
Behavior of partially miscible organic compounds in simulated ground water systems
Production of ethane, ethylene, and acetylene from halogenated hydrocarbons by methanogenic bacteria
Related Subjects
02 PETROLEUM
AUTOMOBILES
EXHAUST GASES
CHEMICAL COMPOSITION
HALOGENATED AROMATIC HYDROCARBONS
CHEMICAL ANALYSIS
POLLUTION SOURCES
ADDITIVES
AIR POLLUTION
EXPERIMENTAL DATA
GASOLINE
AROMATICS
DATA
FLUIDS
FUELS
GASEOUS WASTES
GASES
INFORMATION
LIQUID FUELS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION
VEHICLES
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
020900 - Petroleum- Environmental Aspects