DocumentCode :
2947160
Title :
Laser diagnostics of nanometric soot particles from diesel engines
Author :
Boutou, V. ; Favre, Cecile ; Thomasson, Andreas ; Botet, R. ; Boch, J.P. ; Wolf, J.P.
Author_Institution :
Lab. de Spectrometrie Ionique et Moleculaire, Univ. Claude Bernard, Villeurbanne, France
fYear :
2000
fDate :
10-15 Sept. 2000
Abstract :
Summary form only given. Soot particles from combustion processes are one of the major component of urban aerosols. These particles are highly polymorphous. The smaller, almost spherical particles, (typically 20 to 60 nm in radius) undertake aggregation processes occurring during combustion and possibly during transport in the atmosphere: numerous particles with a fractal structure are produced. The impact on health of these particles, especially the smaller, is important since these particles deposited in lungs are highly toxic: carcinogenic molecules (like polycyclic aromatics) are adsorbed on the soot surface. Unfortunately, because of their size, monomers are rarely taken into account in aerosol analysis and especially in gravimetric studies. Therefore, the development of optical methods to deduce the size distribution and composition of urban aerosols (especially soot particles) over the whole size range is an important challenge. This needs to develop new experimental schemes and models to deduce the scattering properties of fractal soot particles. For that purpose, we have undertaken multiwavelength and multi-angle scattering experiments on a distribution of soot particles.
Keywords :
Rayleigh scattering; aerosols; aggregation; air pollution measurement; atmospheric composition; atmospheric techniques; carbon; combustion; fractals; light scattering; particle size measurement; spectrochemical analysis; 20 to 60 nm; C; adsorbed molecules; aerosol analysis; aggregation processes; atmosphere; carcinogenic molecules; combustion; combustion processes; composition; diesel engines; fractal soot particles; fractal structure; gravimetric studies; health; highly toxic particles; laser diagnostics; lungs; monomers; multi-angle scattering experiments; multiwavelength scattering experiments; nanometric soot particles; numerous particles; optical methods; polycyclic aromatics; polymorphous particles; scattering properties; size distribution; size range; soot particle distribution; soot particles; soot surface; spherical particles; toxic; transport; urban aerosols; Combustion; Diesel engines; Fractals; Optical scattering; Optical surface waves; Particle scattering; Portable media players; Surface-mount technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on
Conference_Location :
Nice
Print_ISBN :
0-7803-6319-1
Type :
conf
DOI :
10.1109/CLEOE.2000.909780
Filename :
909780
Link To Document :
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