X-Ray Techniques for Aerosol Sulfur Baseline Assessment Along an Urban Freeway
(1976) In Advances in X-Ray Analysis 19. p.415-425- Abstract
- Atmospheric aerosol particles have been sampled near a Los Angeles freeway and analyzed by proton-induced X-ray emission, PIXE, as a sulfur baseline study in September 1974 before 1975-model automobiles, equipped with catalytic emission control devices, appeared in large numbers. The sampling plan was optimized according to the requirements of X-ray analysis techniques, fluctuations in air flow across the freeway, and the time and particle size resolution of the aerosol sampling equipment. During five selected two-hour intervals with cross wind conditions, particles were collected as a function of size by six cascade impactors operating simultaneously on three towers at 2 and 7 meters above road level 35 meters upwind and 35 meters... (More)
- Atmospheric aerosol particles have been sampled near a Los Angeles freeway and analyzed by proton-induced X-ray emission, PIXE, as a sulfur baseline study in September 1974 before 1975-model automobiles, equipped with catalytic emission control devices, appeared in large numbers. The sampling plan was optimized according to the requirements of X-ray analysis techniques, fluctuations in air flow across the freeway, and the time and particle size resolution of the aerosol sampling equipment. During five selected two-hour intervals with cross wind conditions, particles were collected as a function of size by six cascade impactors operating simultaneously on three towers at 2 and 7 meters above road level 35 meters upwind and 35 meters downwind of the traffic lanes. Particles as a function of time were sampled continuously, for the 100-hour duration of the experiment, from the tree 7-meter heights using time series streaker filter samplers with two-hour time resolution. Precise analysis of S, Cl, K, Ca, Fe, Br, and Pb established relationships which permit estimates to be made of future increases in particulate sulfur as a consequence of increased sulfate emissions from catalytic automobiles (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2154178
- author
- Akselsson, Roland LU ; Hardy, Ken A ; Desaedeler, Georges G ; Winchester, John W ; Berg, Walter W ; Vandeer Wood, Timothy B ; Nelson, J William ; Spiller, L L and Wilson, W E
- organization
- publishing date
- 1976
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- urban aerosol, PIXE, particle size fraction, elemental composition, time resolution
- in
- Advances in X-Ray Analysis
- volume
- 19
- pages
- 415 - 425
- publisher
- International Centre for Diffraction Data
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Nuclear Physics (Faculty of Technology) (011013007), Ergonomics and Aerosol Technology (011025002)
- id
- 15c7da2a-2cb3-43e5-97df-0aecd206e64b (old id 2154178)
- date added to LUP
- 2016-04-04 09:57:24
- date last changed
- 2018-11-21 20:55:52
@article{15c7da2a-2cb3-43e5-97df-0aecd206e64b, abstract = {{Atmospheric aerosol particles have been sampled near a Los Angeles freeway and analyzed by proton-induced X-ray emission, PIXE, as a sulfur baseline study in September 1974 before 1975-model automobiles, equipped with catalytic emission control devices, appeared in large numbers. The sampling plan was optimized according to the requirements of X-ray analysis techniques, fluctuations in air flow across the freeway, and the time and particle size resolution of the aerosol sampling equipment. During five selected two-hour intervals with cross wind conditions, particles were collected as a function of size by six cascade impactors operating simultaneously on three towers at 2 and 7 meters above road level 35 meters upwind and 35 meters downwind of the traffic lanes. Particles as a function of time were sampled continuously, for the 100-hour duration of the experiment, from the tree 7-meter heights using time series streaker filter samplers with two-hour time resolution. Precise analysis of S, Cl, K, Ca, Fe, Br, and Pb established relationships which permit estimates to be made of future increases in particulate sulfur as a consequence of increased sulfate emissions from catalytic automobiles}}, author = {{Akselsson, Roland and Hardy, Ken A and Desaedeler, Georges G and Winchester, John W and Berg, Walter W and Vandeer Wood, Timothy B and Nelson, J William and Spiller, L L and Wilson, W E}}, keywords = {{urban aerosol; PIXE; particle size fraction; elemental composition; time resolution}}, language = {{eng}}, pages = {{415--425}}, publisher = {{International Centre for Diffraction Data}}, series = {{Advances in X-Ray Analysis}}, title = {{X-Ray Techniques for Aerosol Sulfur Baseline Assessment Along an Urban Freeway}}, volume = {{19}}, year = {{1976}}, }