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Received December 23, 2010
Accepted December 15, 2011
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Development of a PM2.5 sampler with inertial impaction for sampling airborne particulate matter
College of Integrated Science and Technology, Rajamangala University of Technology Lanna, Chiang Mai, 50300, Thailand 1Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, 50200, Thailand 2Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand
Korean Journal of Chemical Engineering, August 2012, 29(8), 1044-1049(6), 10.1007/s11814-011-0299-7
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Abstract
A simple and low cost PM2.5 impactor for sampling airborne particulate matter was developed, designed and evaluated. The design was an assembly of an acceleration nozzle and an impaction plate. Particles with sufficient inertia were unable to follow air streamlines and impacted on the plate. Smaller particles followed the streamlines, avoided being captured by the plate and could then be collected on a downstream filter. Analytical and numerical models were formulated to predict collection efficiency, flow fields and vectors, and particle trajectories in the impactor. The modeling suggested that an optimal operational domain exists for the PM2.5 impactor. A prototype was then built and tested. The collected particles on the impaction plate and downstream of the PM2.5 impactor were analyzed by using scanning electron microscopy. Experimental results agreed well with the theoretical predictions. Testing of the PM2.5 impactor prototype showed promising results for this airborne particulate matter sampler.
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References
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Lundgren DA, J. Air Pollut. Contr. Assoc., 17, 225 (1967)
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Winklmayr W, Wang HC, John W, Aerosol Sci. Technol., 13, 322 (1990)
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Rasband WS, ImageJ, National Institutes of Health, Bethesda, Maryland, USA (2004)
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