Search

Your search keyword '"Simoneit, Bernd R. T."' showing total 50 results
Start Over Author "Simoneit, Bernd R. T." Journal environmental science & technology
50 results on '"Simoneit, Bernd R. T."'

1. Chemical characterization of fine particle emissions from fireplace combustion of woods grown in the northeastern United States

Author

Fine, Philip M., Cass, Glen R., and Simoneit, Bernd R. T.

Subjects
Northeastern United States -- Environmental aspects, Forest products industry -- Research, Air pollution -- Research, Environmental issues, Science and technology
Abstract

Six species of trees grown in the northeastern United States, including northern red oak, eastern white pine, paper birch, eastern hemlock, red maple, and balsalm fir are burned to study the particle-phase organic compounds emitted from different types of wood. Detailed speciation of the compounds emitted from the trees is charted.

Published
2001

2. Bioassay-directed chemical analysis of Los Angeles airborne particulate matter using a human cell mutagenicity assay

Author

Hannigan, Michael P., Cass, Glen R., Penman, Bruce W., Crespi, Charles L., Lafleur, Arthur L., Busby, William F., Jr., Thilly, William G., and Simoneit, Bernd R. T.

Subjects
Environmental issues, Science and technology
Abstract

Unsubstituted polycyclic aromatic compounds (PAC) are the main sources of human cell mutagenicity within airborne fine particulate matter found in Los Angeles, CA. The main types of PACs found in the airborne matter are benzo[a]pyrene, benzo[b]fluoranthene, benzo[ghi]perylene, indeno[1,2,3-cd]pyrene, cyclopental[cd]pyrene, and benzo[k]flouranthene. Other mutagens present in the airborne particulate matter include 6H-benzo[cd]pyren-6-one and 2-nitrofluoranthene.

Published
1998

3. Gas-phase and particle phase organic compounds emitted from motor vehicle traffic in a Los Angeles roadway tunnel

Author

Fraser, Matthew P., Cass, Glen R., and Simoneit, Bernd R. T.

Subjects
Los Angeles, California -- Research, Tunnels -- Research, Air pollution -- Research, Carbon monoxide -- Research, Environmental issues, Science and technology
Abstract

A Los Angeles roadway tunnel yielded carbon monoxide emissions rates of 130 g L-1 of gasoline-equivalent fuel burned and volatile organic compound (VOC) emissions of 9.1 gL-1. The concentration of organic compounds in the tunnel is consistent with a linear combination of the pollutants over a fairly wide range of about 74-97% vehicle exhaust when VOC emissions composition in the tunnel compared to that of tailpipe emissions source test date and to the composition of additional unburned whole gasoline. The fine particulate emissions within the tunnel are made up mostly of carbonaceous material and ammonium nitrate.

Published
1998

4. Sources of fine organic aerosol. 9. pine, oak, and synthetic log combustion in residential fireplaces

Author

Rogge, Wolfgang F., Hildemann, Lynn M., Mazurek, Monica A., Cass, Glen R., and Simoneit, Bernd R. T.

Subjects
Air pollution -- Research, Combustion gases -- Environmental aspects, Fireplaces -- Environmental aspects, Environmental issues, Science and technology
Abstract

The fine particle organic carbon (OC) emmisions to the Los Angeles urban atmosphere appear to have come mostly from the combustion of wood. The fine organic aerosol from wood combustion accounts for 14% of the total OC emissions annually and 30% on winter days. Pine and oak logs are found to produce smoke rich with lignin decomposition products. Resin acids and their thermal alteration products mostly constitute pine smoke. Synthetic log combustion, meanwhile, yields major components of petroleum products combined with traces of sawdust components from which it is made.

Published
1998

5. Air quality model evaluation data for organics. 4. C2-C36 non-aromatic hydrocarbons

Author

Fraser, Matthew P., Cass, Glen R., Simoneit, Bernd R. T., and Rasmussen, R. A.

Subjects
Los Angeles, California -- Research, Photochemical smog -- Research, Alkanes -- Research, Hydrocarbon research -- Evaluation, Environmental issues, Science and technology
Abstract

N-alkanes appear to be the most abundant among the 143 non-aromatic hydrocarbons measured in 36 samples collected during a severe photochemical smog occurrence in Los Angeles, CA. The concentrations of individual low moleculer weight alkenes is reduced during transport across the city in the expected order as they react with the hydroxyl radicals. A substantial decrease in the concentration of petroleum biomarkers, which serve as tracers for particulate organics emitted from vehicle exhaust, was observed between 1982 and 1993.

Published
1997

41. Sugars -- Dominant Water-Soluble Organic Compounds in Soils and Characterization as Tracers in Atmospheric Particulate Matter.

Author

Simoneit, Bernd R. T., Elias, Vladimir O., Kobayashi, Minoru, Kawamura, Kimitaka, Rushdi, Ahmed I., Medeiros, Patricia M., Rogge, Wolfgang F., and Didyk, Borys M.

Subjects
*AEROSOLS, *ORGANIC compounds, *SACCHARIDES, *POLYOLS, *SORBITOL, *MONOSACCHARIDES
Abstract

The presence of saccharides is being reported for aerosols taken in urban, rural, and marine locales. The commonly found primary saccharides area α and β-glucose, α- and β-fructose, sucrose, and mycose with lesser amounts of other monosaccharides. Saccharide polyols are also found in some airsheds and consist mainly of sorbitol, xylitol, mannitol, erythritol, and glycerol. In temperate climate areas these compounds increase from negligible concentrations in winter aerosols (usually dominated by levoglucosan and related anhydrosaccharides from biomass burning) to a maximum in late spring-summer, followed by a decrease to winter. The composition of the saccharide mixtures suggests soil and associated micro- biota as the source. Saccharide analyses of soils confirmed these compositions. Therefore, we propose resuspension of soil (also unpaved road dust) from agricultural activities as a major component of aerosol particles and the saccharides are the source specific tracers. In addition, the saccharides as well as the anhydrosaccharide derivatives from biomass burning are completely water soluble and thus contribute significantly to the total water-soluble mass of aerosols. [ABSTRACT FROM AUTHOR]

Published
2004
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results