Assessing Potential Nanoparticle Release During Nanocomposite Shredding Using Direct-Reading Instruments.
This study was conducted to determine if engineered nanoparticles are released into the air when nanocomposite parts are shredded for recycling. Test plaques made from polypropylene resin reinforced with either montmorillonite nanoclay or talc and from the same resin with no reinforcing material wer...
| Published in: | Journal of Occupational & Environmental Hygiene Vol. 9; no. 1; pp. 1 - 14 |
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| Main Authors: | , , , , , |
| Format: | pictorial research tables/charts Journal Article |
| Published: |
Taylor & Francis Ltd
Jan2012
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104561500&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104561500 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Jan2012 vid: 9 iid: 1 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 104561500 74688743 10.1080/15459624.2012.633061 NLM22168254 104561500 ppf: 1 ppct: 13 formats: fmt: @attributes: type: P tig: atl: Assessing Potential Nanoparticle Release During Nanocomposite Shredding Using Direct-Reading Instruments. aug: au: Raynor, Peter C. Cebula, Jessica Ingraham Spangenberger, Jeffrey S. Olson, Bernard A. Dasch, Jean M. D’Arcy, James B. affil: University of Minnesota, Division of Environmental Health Sciences sug: subj: Occupational Exposure Evaluation Particulate Matter Recycling Air Pollution, Indoor Evaluation Human Illinois Resins, Synthetic Classification Dust Analysis Data Analysis Software Microscopy, Electron Descriptive Statistics Funding Source ab: This study was conducted to determine if engineered nanoparticles are released into the air when nanocomposite parts are shredded for recycling. Test plaques made from polypropylene resin reinforced with either montmorillonite nanoclay or talc and from the same resin with no reinforcing material were shredded by a granulator inside a test apparatus. As the plaques were shredded, an ultrafine condensation particle counter; a diffusion charger; a photometer; an electrical mobility analyzer; and an optical particle counter measured number, lung-deposited surface area, and mass concentrations and size distributions by number in real-time. Overall, the particle levels produced were both stable and lower than found in some occupational environments. Although the lowest particle concentrations were observed when the talc-filled plaques were shredded, fewer nanoparticles were generated from the nanocomposite plaques than when the plain resin plaques were shredded. For example, the average particle number concentrations measured using the ultrafine condensation particle counter were 1300 particles/cm3 for the talc-reinforced resin, 4280 particles/cm3 for the nanoclay-reinforced resin, and 12,600 particles/cm3 for the plain resin. Similarly, the average alveolar-deposited particle surface area concentrations measured using the diffusion charger were 4.0 μm2/cm3 for the talc-reinforced resin, 8.5 μm2/cm3 for the nanoclay-reinforced resin, and 26 μm2/cm3 for the plain resin. For all three materials, count median diameters were near 10 nm during tests, which is smaller than should be found from the reinforcing materials. These findings suggest that recycling of nanoclay-reinforced plastics does not have a strong potential to generate more airborne nanoparticles than recycling of conventional plastics. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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