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Investigation of the aerosols produced by a high-speed, hand-held grinder using various substrates.

Authors
Zimmer-AT; Maynard-AD
Source
Ann Occup Hyg 2002 Nov; 46(8):663-672
NIOSHTIC No.
20022263
Abstract
Mechanical processes such as grinding are classically thought to form micrometer scale aerosols through abrasion and attrition. High-speed grinding has been used as the basis for testing the hypothesis that ultrafine particles do not form a substantial component of mechanically generated aerosols. A wide variety of grinding substrates were selected for evaluation to represent the broad spectrum of materials available. To characterize the particle size distribution over particle sizes ranging from 4.2 nm to 20.5 Ám, the aerosol-laden air collected from an enclosed chamber was split and directed to three aerosol instruments operated in parallel. Transmission electron microscope samples of the various grinding substrates were also collected. The results demonstrate that ultrafine particles do have the potential to form a significant component of a grinding aerosol for a number of substrates. It appears that the ultrafine aerosols were formed by the following processes: (i) from within the grinding motor, (ii) from the combustion of amenable grinding substrates and (iii) from volatilization of amenable grinding materials at the grinding wheel/substrate interface.
Keywords
Aerosols; Abrasion; Testing-equipment; Airborne-particles; Sampling; Particulate-dust; Particulates; Dusts; Dust-particles; Nanotechnology
Contact
National Institute for Occupational Safety and Health, Division of Applied Research and Technology, 4676 Columbia Parkway, Cincinnati, OH 45226, USA
CODEN
AOHYA3
Publication Date
20021101
Document Type
Journal Article
Email Address
azimmer@cdc.gov
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Issue of Publication
8
ISSN
0003-4878
NIOSH Division
DART
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Annals of Occupational Hygiene
State
OH
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