Aerosolization of fine particles increases due to microbial contamination of metalworking fluids.
Wang-HX; Reponen-T; Li-W; Martuzevicius-D; Grinshpun-SA; Willeke-K
J Aerosol Sci 2005 Mar; 36(3):1-14
Aerosolization of microorganisms from metalworking fluids (MWFs) was studied using a laboratory-scale set-up simulating grinding operations. An optical particle counter (OPC), a condensation nucleus counter (CNC), an electrical low pressure impactor (ELPI), and a photometric aerosol mass monitor were used to measure the airborne particles and microorganisms aerosolized from MWFs. The tests were performed using a semi-synthetic MWF with and without bacterial contamination (Pseudomonas fluorescens). Microbial contamination of the MWF increased the number and mass concentrations of aerosolized particles by a factor of 2 (as measured by the OPC and the photometric aerosol mass monitor, respectively). At the same time, there was an up to 50-fold increase in the concentration of fine particles , as measured by the CNC. The data collected with the ELPI showed that the peak of the fine particle number concentration was at . The results indicate that MWF mist may contain high concentrations of microbial fragments, which may not be detected by traditional microbial analysis methods, such as cultivation or microscopic counting.
Metalworking-fluids; Aerosols; Aerosol-particles; Microorganisms; Analytical-processes; Analytical-methods
Department of Environmental Health, University of Cincinnati, P.O. Box 670056, 3223 Eden Ave, Cincinnati, OH 45267
Work Environment and Workforce: Mixed Exposures
Journal of Aerosol Science
University of Cincinnati