Aerosol research and development related to health hazard analysis. Progress report July 1, 1974--June 30, 1975

Technical Report · Mon Mar 01 04:00:00 EST 1976

DOI:https://doi.org/10.2172/7279594· OSTI ID:7279594

Fairchild, C I; Ortiz, L W; Ettinger, H J; Tillery, M I

Preliminary tests of particulate collection by charcoal-filled gas-vapor sampler tubes (organic vapor samplers) indicate that collection efficiencies for 0.8- to 2.0-..mu..m monodisperse polystyrene latex spheres range from 50 to 80 percent. Operation of the 10-mm nylon cyclone coal mine personal sampler at a flow rate of 2.0 liters/min with FWS-B or VM-1 second-stage membrane filters underestimates the respirable dust concentration by as much as 19 to 23 percent when sampling coal dust having an aerodynamic mass median diameter (mmad) of approximately equal to 3.7 ..mu..m. Tests with the same dust indicated no significant difference in respirable dust estimates for electrically charged and uncharged coal dust aerosols. Evaluation of the 10-mm nylon cyclone for estimating respirable mass of airborne fibrous glass was completed. Results indicate that a fixed sampling flow rate of 1.7 liters/min provides an adequate measure of ''respirable'' mass fraction. Mass median aerodynamic diameters of the seven aerosols used in this evaluation ranged from 2.9 to 6.1 ..mu..m with a geometric standard deviation (sigma/sub g/) of approximately 1.8. Fiber sizing data further indicates that the cyclone provides aerodynamic size separation of fibrous glass aerosols when operated at 1.7 liters/min. A new, modified fibrous aerosol generator has been built and evaluated for use under long-term, unattended operations.

• Research Organization: Los Alamos Scientific Lab., N.Mex. (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7279594
• Report Number(s): LA-6277-PR
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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54 ENVIRONMENTAL SCIENCES
AERODYNAMICS
AEROSOL GENERATORS
AEROSOLS
AIR POLLUTION
COAL MINERS
COAL MINES
COLLOIDS
CONCENTRATORS
CYCLONE SEPARATORS
DISPERSIONS
DUSTS
ELASTOMERS
EQUIPMENT
FLUID MECHANICS
HAZARDS
HEALTH HAZARDS
INERTIAL SEPARATORS
LABORATORY EQUIPMENT
LATEX
MECHANICS
MINERS
MINES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE SIZE
PERSONNEL
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLLUTION
POLLUTION CONTROL EQUIPMENT
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RUBBERS
SAMPLERS
SAMPLING
SIZE
SOLS