Electrostatic effects in asbestos sampling. II: Comparison of theory and experiment.
Am Ind Hyg Assoc J
; 51(2): 63-9, 1990 Feb.
Article
en En
| MEDLINE
| ID: mdl-2305675
ABSTRACT
A series of calculations was conducted to estimate the degree and type of electrostatic interactions that might occur with electrically charged asbestos samplers collecting charged particles. Relatively simple theoretical models were constructed assuming only charge-charge electrostatic interactions between a charged particle and a charged sampler. The results of these calculations were compared with some experimental measurements and the agreement between the two allowed some confidence in predicting behavior trends. Under conditions where both the particles and the sampler are charged, the nonconductive sampler exhibits increased particle loss, especially near the filter edge, and increased variability of the particle deposit. The variability of the deposit also tends to be greatest near the filter edge. Under similar conditions, conductive cowled samplers also can be expected to exhibit losses in particle deposit, especially near the filter edge. The variability over the filter surface, however, is less than for the nonconductive cowl. Particle collection onto the sampler filter generally is expected to be greatest for isokinetic, isoaxial sampling conditions. Particle collection on the filter decreases with lower sampling flow rates, lower air velocities near the sampler inlet, and increased turbulence near the inlet.
Buscar en Google
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Amianto
/
Monitoreo del Ambiente
/
Contaminantes Atmosféricos
/
Electricidad
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Am Ind Hyg Assoc J
Año:
1990
Tipo del documento:
Article