Details:

Alternative Title:
Aerosol Sci Technol
Publisher's site:
http://dx.doi.org/10.1080/02786826.2016.1164828
Personal Author:
Mines, Levi W. D. ; Park, Jae Hong ; Mudunkotuwa, Imali A. ; Anthony, T. Renée ; Grassian, Vicki H. ; ... More +
Mines, Levi W. D. ; Park, Jae Hong ; Mudunkotuwa, Imali A. ; Anthony, T. Renée ; Grassian, Vicki H. ; Peters, Thomas M. Less -
Description:
Porous polyurethane foam was evaluated to replace the eight nylon meshes used as a substrate to collect nanoparticles in the Nanoparticle Respiratory Deposition (NRD) sampler. Cylindrical (25-mm diameter by 40-mm deep) foam with 110 pores per inch was housed in a 25-mm-diameter conductive polypropylene cassette cowl compatible with the NRD sampler. Pristine foam and nylon meshes were evaluated for metals content via elemental analysis. The size-selective collection efficiency of the foam was evaluated using salt (NaCl) and metal fume aerosols in independent tests. Collection efficiencies were compared to the nanoparticulate matter (NPM) criterion and a semi-empirical model for foam. Changes in collection efficiency and pressure drop of the foam and nylon meshes were measured after loading with metal fume particles as measures of substrate performance. Substantially less titanium was found in the foam (0.173 μg sampler(-1)) compared to the nylon mesh (125 μg sampler(-1)), improving the detection capabilities of the NRD sampler for titanium dioxide particles. The foam collection efficiency was similar to that of the nylon meshes and the NPM criterion (R(2) = 0.98, for NaCl), although the semi-empirical model underestimated the experimental efficiency (R(2) = 0.38). The pressure drop across the foam was 8% that of the nylon meshes when pristine and changed minimally with metal fume loading (~ 19 mg). In contrast, the pores of the nylon meshes clogged after loading with ~ 1 mg metal fume. These results indicate that foam is a suitable substrate to collect metal (except for cadmium) nanoparticles in the NRD sampler.
Subjects:
[+]
Article Nanoparticle Sampler Particle Loading Polyurethane Foam Salt Particles Titanium Welding Particles
Source:
Aerosol Sci Technol. 50(5):497-506.
Pubmed ID:
28867869
Pubmed Central ID:
PMC5580938
Document Type:
Journal Article
Funding:
R01 OH010238/OH/NIOSH CDC HHS/United States ; T42 OH008491/OH/NIOSH CDC HHS/United States
R01 OH010238/OH/NIOSH CDC HHS/United States ; T42 OH008491/OH/NIOSH CDC HHS/United States Less -
Collection(s):
CDC Public Access
Main Document Checksum:
[+]
urn:sha256:a2da681e4c549b035f4ca1577fc31cea28e6b543a1a87914a78fa50d54e06214
Download URL:
https://stacks.cdc.gov/view/cdc/47998/cdc_47998_DS1.pdf
File Type:

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