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Mining Publication: A Handheld Electrostatic Precipitator for Sampling Airborne Particles and Nanoparticles
Keywords: Aerosols Electrostatic precipitators Microscopy Sampling
Original creation date: June 2010
Authors: AL Miller, G Frey, GW King, CB Sunderman
Peer Reviewed Journal Article - June 2010
Download PDF Document (0.29 MB)
NIOSHTIC2 Number: 20036794
Aerosol Sci Tech 2010 Jun; 44(6):417-427
Researchers at NIOSH are developing methods for characterizing ultrafine aerosols in workplaces. One method includes the detailed analysis of collected particles using electron microscopy (EM). In order to collect samples for EM at remote workplaces including mining and manufacturing facilities, researchers have developed a handheld electrostatic precipitator (ESP) particle sampler capable of collecting airborne particles including nanoscale materials, for subsequent EM analysis. The handheld ESP has been tested in the laboratory and is currently undergoing beta testing in the field. Gross collection efficiencies were measured with a CPC and net efficiencies by EM analysis of collected samples. Using laboratory-generated NaCl aerosols in the 30-400 nm size range at a flow rate of 55 cc/min and ESP operating voltages between 5.6- 6.8 kV, both gross and net efficiencies were measured and showed a similar correlation with voltage, with maximum efficiency of approximately 86% at 6.4 kV. EM images from samples were also used to estimate particle size distributions of the original aerosols and the size-dependent deposition was evaluated for upstream versus downstream locations on the sample media. Results suggest that the number concentration and particle size distribution of sampled aerosols may potentially be estimated from a single ESP sample, but that the accuracy and repeatability of such quantification need to be investigated and refined. NIOSH is planning to license the ESP sampler for commercial manufacturing.
Image of publication A Handheld Electrostatic Precipitator for Sampling Airborne Particles and NanoparticlesPeer Reviewed Journal Article - June 2010
Download PDF Document (0.29 MB)
NIOSHTIC2 Number: 20036794
Aerosol Sci Tech 2010 Jun; 44(6):417-427
See Also
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Characterizing Exposures to Airborne Metals and Nanoparticle Emissions in a Refinery
Comparing Measurements of Carbon in Diesel Exhaust Aerosols Using the Aethalometer, NIOSH Method 5040, and SMPS
Determining the Spatial Variability of Personal Sampler Inlet Locations
In-depth Survey Report: Control Technology for Environmental Enclosures - The Effect of Wind Speed Upon Aerosol Penetration Into an Enclosure at Clean Air Filter, Defiance, IA
Morphological and Elemental Classification of Freshly Emitted Soot Particles and Atmospheric Ultrafine Particles using the TEM/EDS
Observations of Post-Explosion Dust Samples From an Experimental Mine
Portable XRF Analysis of Occupational Air Filter Samples from Different Workplaces Using Different Samplers: Final Results, Summary and Conclusions
Rock Dusting Considerations in Underground Coal Mines
Workplace Aerosol Measurement
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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