Determination of permeability of ultra-fine cupric oxide aerosol through military filters and protective filters

• Published in: Journal of physics. Conference series 2018-03, Vol.987 (1), p.12037
• Main Authors: Kellnerová, E, Večeřa, Z, Kellner, J, Zeman, T, Navrátil, J
• Format: Article
• Language: English
• Subjects: Aerosols; Copper oxides; Efficiency; Evaluation; Filtration; Nanoparticles; Nuclear safety; Permeability; Physics
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/987/1/012037

The paper evaluates the filtration and sorption efficiency of selected types of military combined filters and protective filters. The testing was carried out with the use of ultra-fine aerosol containing cupric oxide nanoparticles ranging in size from 7.6 nm to 299.6 nm. The measurements of nanoparticles were carried out using a scanning mobility particle sizer before and after the passage through the filter and a developed sampling device at the level of particle number concentration approximately 750000 particles·cm-3. The basic parameters of permeability of ultra-fine aerosol passing through the tested material were evaluated, in particular particle size, efficiency of nanoparticle capture by filter, permeability coefficient and overall filtration efficiency. Results indicate that the military filter and particle filters exhibited the highest aerosol permeability especially in the nanoparticle size range between 100-200 nm, while the MOF filters had the highest permeability in the range of 200 to 300 nm. The Filter Nuclear and the Health and Safety filter had 100% nanoparticle capture efficiency and were therefore the most effective. The obtained measurement results have shown that the filtration efficiency over the entire measured range of nanoparticles was sufficient; however, it was different for particular particle sizes.