Record Display for the EPA National Library Catalog


Main Title Study of Laser Backscatter by Particulates in Stack Emissions.
Author Uth, Edward E. ; Lappl, Charles E. ;
CORP Author Stanford Research Inst., Menlo Park, Calif.
Year Published 1972
Report Number CPA-70-173; SRI-8730; R2-72-089;
Stock Number PB-212 530
Additional Subjects ( Air pollution ; Optical radar) ; ( Detectors ; Particles) ; ( Smoke ; Detectors) ; Chimneys ; Plume detection ; Fly ash ; Optimization ; Backscattering ; Tests ; Design criteria ; Light scattering ; Remote sensing ; Particle size ; Opacity ; Reflectance ; Concentration(Composition) ; Air pollution detection ; Mie scattering
Library Call Number Additional Info Location Last
NTIS  PB-212 530 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 158p
The validity of determining smoke plume opacity or particulate content from measurements of the backscatter of laser radiation from plume particulates was investigated. The backscatter experiments were conducted with the use of a specially designed aerosol chamber that allowed the experimental geometry to simulate that associated with actual remote plume probing. Raw fly ash collected from a bituminous coal-burning power plant was classified into various size fractions and pneumatically injected into the chamber at controlled concentrations. The aerosol was continuously monitored by a white light transmissometer along the axis of the chamber. Lidar measurements were made to determine the backscatter and transmission of the generated aerosols. These results for fly ash indicate that plume opacity may be determined from lidar backscatter measurements at 0.7 microns wavelength, but that mass concentration is better inferred from 1.06 microns lidar backscatter measurements. (Author)