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Ultrafine Particles Emitted from Scented Markers



Details

  • Personal Author:
  • Description:
    Recent studies found an increase in ultrafine particles (UFPs diameter < 100 nm) concentration inside classrooms during art activities. Art products (e.g. scented markers) containing ozone reactive terpenes are possible sources. Experiments using scented markers were conducted inside a stainless steel chamber with air sample ports and fans to control air exchange rate and mixing. Ozone was supplied to the chamber from a UV lamp ozone generator. A scented marker was used to color an area of 24 cm by 18 cm on a sheet of A4 paper inside the chamber via a glove port while UFP number concentration, size distribution, and ozone concentrations were measured. Twelve different scents from three brands of markers were tested and only the lemon scent from one brand produced UFPs. Calculated emission rates ranged from 2.4×106 - 5.7×107 particles/second. Particle size measurements revealed unimodal distributions in the range of 20 - 30 nm. Experiments at decreasing ozone concentrations showed a critical point (50 ppb), below which no UFPs were detected above background. Model simulation revealed that drawing with the lemon-scented marker emitted ozone-reactive VOCs, most likely limonene, in the order of 10 - 100 microgram, which yielded in the same order of magnitude of secondary organic aerosols (SOA). These findings suggest that not all scented markers contain reactive terpenes, and substituting products can reduce children's exposure to UFPs. [Description provided by NIOSH]
  • Subjects:
  • Keywords:
  • Publisher:
    American Association for Aerosol Research
  • Document Type:
    Text
  • Funding:
    Grant
  • Genre:
    Abstract or Summary
  • Place as Subject:
  • CIO:
    National Institute for Occupational Safety and Health (NIOSH)
  • Topic:
    Workplace Safety & Health
  • Location:
    North America
  • NIOSHTIC Number:
    nn:20055858
  • Citation:
    Proceedings of the AAAR 32nd Annual Conference, September 30-October 4, 2013, Portland, Oregon. Mount Laurel, NJ: American Association for Aerosol Research, 2013 Sep-Oct; :1IA.1
  • CAS Registry Number:
  • Federal Fiscal Year:
    2013
  • Performing Organization:
    University of California Los Angeles
  • Peer Reviewed:
    False
  • Start Date:
    20050701
  • Source Full Name:
    Proceedings of the AAAR 32nd Annual Conference, September 30-October 4, 2013, Portland, Oregon
  • End Date:
    20270630
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:fdbb0048a58b00f13207c0fe6374f76b5ccbee991ab55dfb11dc4b5d3cc3b08ca82b10fa2fd4c5c583980636ddf50aa1d5234f39c774214eeeb7f81a69d41310
  • Download URL:
  • File Type:
    Filetype[PDF - 215.51 KB ]
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