Forskning
Udskriv Udskriv
Switch language
Region Hovedstaden - en del af Københavns Universitetshospital
Udgivet

Experimentally determined human respiratory tract deposition of airborne particles at a busy street

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  1. Predicting Transdermal Uptake of Phthalates and a Paraben from Cosmetic Cream Using the Measured Fugacity

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  2. Dermal Uptake of Benzophenone-3 from Clothing

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  3. Predictors of polychlorinated biphenyl concentrations in adipose tissue in a general Danish population

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  1. Long-term exposure to air pollution and stroke incidence: A Danish Nurse cohort study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  2. Long-Term Exposure to Air Pollution and Incidence of Myocardial Infarction: A Danish Nurse Cohort Study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  3. Psychological stress, stressful life events, male factor infertility, and testicular function: a cross-sectional study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

  4. Male factor infertility and risk of death: a nationwide record-linkage study

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Vis graf over relationer

Traffic is one of the major sources of harmful airborne particles worldwide. To relate exposure to adverse health effects it is important to determine the deposition probability of the inhaled particles in the human respiratory tract. The size-dependent deposition of 12-580 nm particles was measured with a novel setup in 9 healthy subjects breathing by mouth on the windward side of a busy street in Copenhagen, Denmark. The aerosol was characterized both at the curbside and, to obtain the background concentration, at rooftop level. Particle hygroscopicity, a key parameter affecting respiratory tract deposition, was also measured at the same time of exposure. The total deposition fraction of the curbside particles in the range 12-580 nm was 0.60 by number, 0.29 by surface area, and 0.23 by mass. The deposition fractions of the "traffic exhaust" contribution, calculated as the hydrophobic fraction of the curbside particles, was 0.68, 0.35, and 0.28 by number, surface area, and mass, respectively. The deposited amount of traffic exhaust particles was 16 times higher by number and 3 times higher by surface area compared to the deposition of residential biofuel combustion particles investigated previously (equal inhaled mass concentrations). This was because the traffic exhaust particles had both a higher deposition probability and a higher number and surface area concentration per unit mass. To validate the results, the respiratory tract deposition was estimated by using the well-established ICRP model. Predictions were in agreement with experimental results when the effects of particle hygroscopicity were considered in the model.

OriginalsprogEngelsk
TidsskriftEnvironmental Science & Technology
Vol/bind43
Udgave nummer13
Sider (fra-til)4659-64
Antal sider6
ISSN0013-936X
StatusUdgivet - 1 jul. 2009

ID: 57257032