Aerosol carbon in the denver area in November 1973

Abstract Aerosol samples collected at the Rocky Mountain Arsenal during the Brown Cloud month of November 1973 showed an amount of unextractable carbon compatible with the Waggoner-Charlson hypothesis that the Denver Brown Cloud is caused by sub-0.1-μm elemental carbon particles. The unextractable carbon was only a small fraction of the total suspended participates and the extent to which it actually causes the perception of the Brown Cloud is not presently quantifiable. Correlation of carbon with lead showed that at these sites the carbon and lead came from the same source or from sources that were somehow strongly linked. The C/Pb mass ratio was 5.5, which is higher than is ordinarily observed from gasoline-powered vehicles operating on leaded gasoline; the possibility that this unexpected observation may result from the operation of engines at Denver elevation merits further investigation.

[1]  Haar G L Ter.  Composition, size and control of automotive exhaust particulates. , 1972 .

[2]  L. Richards,et al.  Tinting strength of carbon black , 1972 .

[3]  K Habibi,et al.  Characterization of particulate matter in vehicle exhaust. , 1973, Environmental science & technology.

[4]  H. W. Edwards,et al.  Seasonal trends in Denver atmospheric lead concentrations , 1978 .

[5]  R I Larsen,et al.  AIR POLLUTION FROM MOTOR VEHICLES * , 1966, Annals of the New York Academy of Sciences.

[6]  W. Pierson,et al.  Sources and elemental composition of aerosol in Pasadena, California, by energy-dispersive x-ray fluorescence , 1975 .

[7]  Robert Henry Hammerle,et al.  Sulfate formed by interaction of sulfur dioxide with filters and aerosol deposits , 1976 .

[8]  Virgil J. Konopinski,et al.  Sumner Tunnel Air Quality. , 1962 .

[9]  William R. Pierson,et al.  Note on In-Traffic Measurement of Airborne Tire-Wear Participate Debris , 1975 .

[10]  P. Mueller.  Characterization of particulate lead in vehicle exhaust-experimental techniques. Comments , 1970 .

[11]  W. Pierson,et al.  Analytical Method for Measuring SBR Tire Debris in the Environment , 1974 .

[12]  K. Habibi.  Characterization of particulate lead in vehicle exhaust-experimental techniques , 1970 .

[13]  David M. Roessler,et al.  Carbon aerosol visibility vs particle size distribution. , 1978, Applied optics.

[14]  Hirschler Da,et al.  NATURE OF LEAD IN AUTOMOBILE EXHAUST GAS. , 1964 .

[15]  L. F. Gilbert,et al.  Particulate Lead Compounds in Exhaust Gas , 1957 .