Experimental and Modeling Studies on the Filtration of SiO2 Nanoparticles Aerosolized from Different Solvents

Environmental Science & Technology
Youfeng WangGuanglu Ge

Abstract

The filtration performance of a fibrous filter in removing nano-SiO2 aerosols atomized using different solvents including methanol, ethanol, 1-propanol, water, and the ethanol/water mixture has been investigated. Through discrete element method (DEM) simulation and filtration experiments, the efficiency variation caused by the combinative interaction of the particle-filter adhesion and interparticle attraction has been analyzed and verified. The adhesion force between the solvent-coated nanoparticles and the filter is considered as the key factor to influence their initial filtration efficiency and can be balanced by their interparticle interaction. The stronger the adhesion, the higher the initial filtration efficiency. Primary aggregate is formed through the particle-fiber interaction, and further agglomerate is caused by particle migration on the fibers, i.e. secondary aggregate. Hydrogen bonding interaction is considered as the main factor causing interparticle secondary agglomeration, and plenty of OH groups existing in the nano-SiO2 aerosols yielded from alcohol promotes the particle secondary aggregation. As a result, the Brown diffusion capture of the filter is significantly abated, and the as-formed agglomerate is scra...Continue Reading

References

Aug 25, 2000·Applied Occupational and Environmental Hygiene·S B Martin, E S Moyer
Oct 9, 2002·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Zhaoli Guo, T S Zhao
Oct 24, 2002·Journal of the American Chemical Society·Masashi MizukamiKazue Kurihara
Oct 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Masashi MizukamiKazue Kurihara
Nov 24, 2006·Environmental Science & Technology·Anatol JaworekMarcin Lackowski
Mar 1, 2012·The Science of the Total Environment·Gi Byoung HwangGwi-Nam Bae
Sep 25, 2015·Environmental Science & Technology·James F MontgomeryAllan K Bertram

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Citations

Dec 3, 2020·Journal of Applied Toxicology : JAT·Mengya TianTing Wang

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