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KMID : 1039220160260030367
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Journal of Korean Society of Occupational and Environmental Hygiene
2016 Volume.26 No. 3 p.367 ~ p.376
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Filtration efficiency and Manikin-based Total Inward Leakage Study of Particle Filtering Mask Challenged with Silver Nanoparticles
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Kim Jong-Kyu
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Abstract
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Objectives: The production and use of nanoparticles have been increased. In 2014 Workplace Survey Results, 335 companies produce and treat nanoparticls. However, lack of data on nano-toxicity and a method for risk management and regulation on nanoparticles and the standard test method are not sufficient. Protective equipment selection guidelines for nanoparticles are not established. It is required to carry out respirator efficiency test against nanoparticles. This study was performed to evaluate filtration efficiency and manikin-based total inward leakage of particle filtering mask using in Korean country challenged with silver nanoparticles.
Methods: We investigated filtration efficiency and total inward leakage of 7 respirator with silver nanoparticle.
Results: The geometric mean diameters of Silver nanoparticles were 30 ㎚ and number concentration were about 106 #/㎤. Filtration efficiency of six of the seven particle filtering masks was more than 98% and one particle filtering masks filtration efficiency was 94.9%. The filtration efficiency of particle filtering masks to 20 ㎚ silver nanoparticels was highest. Artificial breathing machine with manikin based total inward leakage were 7.6% ~ 42.3%.
Conclusions: The results of this study nano-silver filter efficiency was high but the total inward leakage was higher than filter penetration. Therefore, education on how to wear a respirator should be demanded. Especially for workers andling nanoparticles and toxic material, user seal checking and fit test must be performed.
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KEYWORD
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artificial breathing machine, filtration efficiency, silver-nanoparticles, total inward leakage
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