TY - JOUR
T1 - Sources of Fine Organic Aerosol. 3. Road Dust, Tire Debris, and Organometallic Brake Lining Dust
T2 - Roads as Sources and Sinks
AU - Rogge, Wolfgang F.
AU - Hildemann, Lynn M.
AU - Mazurek, Monica A.
AU - Cass, Glen R.
AU - Simoneit, Bernd R.T.
PY - 1993
Y1 - 1993
N2 - Particulate matter emitted to the atmosphere due to motor vehicles arises from several sources in addition to tailpipe exhaust. In this study, the organic constituents present in fine particulate (dp ≤ 2.0 µm) road dust, brake lining wear particles, and tire tread debris (not size segregated) are analyzed using gas chromatography/mass spectrometry. The objective is to characterize such traffic-related sources on an organic compound basis and to search for molecular markers that will assist the identification of traffic-associated dusts in the urban atmosphere. More than 100 organic compounds are quantified in these samples, including n-alkanes, n-alkanoic acids, n-alkenoic acids, n-alkanals, n-alkanols, benzoic acids, benzaldehydes, polyalkylene glycol ethers, PAH, oxy-PAH, steranes, hopanes, natural resins and other compound classes. Paved road dust acts as a repository for vehicle-related particles, which can then be resuspended by the passing traffic. To evaluate the contributions from major urban sources to the road dust complex, source profiles representing different types of vehicle exhaust, brake dust, tire debris, and vegetative detritus are compared, and their fractional contributions are estimated using several groups of organic tracer compounds. Likewise, the close relationship between airborne fine particulate organic constituents and road dust organic matter is discussed.
AB - Particulate matter emitted to the atmosphere due to motor vehicles arises from several sources in addition to tailpipe exhaust. In this study, the organic constituents present in fine particulate (dp ≤ 2.0 µm) road dust, brake lining wear particles, and tire tread debris (not size segregated) are analyzed using gas chromatography/mass spectrometry. The objective is to characterize such traffic-related sources on an organic compound basis and to search for molecular markers that will assist the identification of traffic-associated dusts in the urban atmosphere. More than 100 organic compounds are quantified in these samples, including n-alkanes, n-alkanoic acids, n-alkenoic acids, n-alkanals, n-alkanols, benzoic acids, benzaldehydes, polyalkylene glycol ethers, PAH, oxy-PAH, steranes, hopanes, natural resins and other compound classes. Paved road dust acts as a repository for vehicle-related particles, which can then be resuspended by the passing traffic. To evaluate the contributions from major urban sources to the road dust complex, source profiles representing different types of vehicle exhaust, brake dust, tire debris, and vegetative detritus are compared, and their fractional contributions are estimated using several groups of organic tracer compounds. Likewise, the close relationship between airborne fine particulate organic constituents and road dust organic matter is discussed.
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U2 - 10.1021/es00046a019
DO - 10.1021/es00046a019
M3 - Article
AN - SCOPUS:0027338234
SN - 0013-936X
VL - 27
SP - 1892
EP - 1904
JO - Environmental Science & Technology
JF - Environmental Science & Technology
IS - 9
ER -