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3. Alternatives to filtering media
Filtration using fibrous media is still the most widely used means of protection in industry today. However, these filters, which are initially highly effective regardless of particle size, have certain drawbacks when it comes to nanoparticles. On the one hand, the kinetics of pressure drop evolution are extremely rapid compared with micron or submicron particles, due to the very high specific surface area of nanoparticles. To limit clogging, it is therefore necessary to regenerate the media periodically, which is not without other drawbacks (media wear, potential plant stoppage, etc.). In addition, the size of nanoparticles greatly increases their adhesion forces with the filter surface, compared with micron-sized particles, thus limiting the effectiveness of filter cleaning techniques.
To overcome these problems, the potential offered by alternative or complementary...
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Alternatives to filtering media
Bibliography
Standards and norms
- Appareils de protection respiratoire ; Demi-masques filtrants contre les particules : Exigences, essais, marquage - NF EN 149+A1 - 2009
- Respiratory protection devices – Recommendations for selection, use, care and maintenance – Guide. - NF EN 529 - 2006
- Respiratory protection devices – Compressed gases for self-contained breathing apparatus. - NF EN 12021 - 2014
- Filtres à air à haute efficacité...
Regulations
Nanomaterials – Definitions, toxicological risks, characterization of occupational exposure and prevention measures, ED 6050, INRS, Paris, September 2012, 48 p.
INRS website
Directory
Organizations – Federations – Associations (non-exhaustive list)
French Society for Fluid-Particle Separations (SF2P)
French Aerosol Research and Study Association (ASFERA)
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