The role of the diesel aerosol in the air pollution of Vienna

Horváth, H.; Kreiner, I.; Norek, C.; Georgi, B.

doi:10.1016/0021-8502(87)90130-3

Cited by 6 publications

(2 citation statements)

References 2 publications

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“…For Berner-type impactors with multiorifice stage geometry, there are only a few calibrations available (Reineking et al, 1986;Wang and John, 1988), although these impactors are extensively used in size classification of aerosols (Berner and Lurzer, 1980;Hitzenberger and Husar, 1984;Puxbaum and Wopenka, 1984;Berner, 1985;Georgi et al, 1986;Burki et al, 1987;Horvath et al;1987). The impactor model studied in this work ) is not calibrated.…”

Section: Introductionmentioning

confidence: 99%

On the Performance of the Berner Low Pressure Impactor

Hillamo

Kauppinen

1991

Aerosol Science and Technology

251

118

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Particle collection characteristics of the compressible flow stages 1-6 of the Berner low-pressure impactor (BLPI, Hauke Aeras 25-4/0.015) have been studied. A new, real-time impactor stage efficiency measurement system has been developed. It is based on the use of two electrometers, one connected to the collection plate of the impactor, and the other to the backup filter. This method is used with singly charged, monodisperse dioctyl phthalate (DOP) particles to determine the shape of the collection efficiency curves of the BLPI. In addition, particle collection characteristics have been studied using fluorometric analysis. A new method for substrate film greasing is also introduced. Experimental cut diameters of stages 1-6, as determined with DOP particles using electrical measurement method, are 0.034, 0.066, 0.094, 0.17, 0.33, and 0.55 pm. They are clearly larger than corresponding values given by the manufacturer. The average of the square root of the Stokes number at 50% collection efficiency, based on experimental cut diameters and evaluated at stage conditions, is 0.465. For solid ammonium fluorescein particles the collection efficiency of high-velocity stages (1-6) was poor, although the substrates (Mylar film) were greased with Apiezon L vacuum grease. Using experimentally determined stage pressures and calculated cut diameters it was established that the compressible flow stages of different units of the same BLPI model may have significantly different cut diameters. The effect of temperature and pressure on cutoff diameters at atmospheric conditions near ground level is also discussed.

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Section: Introductionmentioning

confidence: 99%

On the Performance of the Berner Low Pressure Impactor

Hillamo

Kauppinen

1991

Aerosol Science and Technology

251

118

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“…Another approach has been to perform retrograde irradiation either by neutrons or by accelerated ions in order to cause a nuclear reaction of selected chemical elements of interest resulting in radionuclides which were subsequently quantitated by radiation spectroscopy. For example, in an environmental study of diesel soot in the mid-1980s (Horvath et al, 1987), the total amount of diesel fuel sold at all fueling stations in Vienna and the surrounding vicinity over a four-week period was labeled using an organic complex of the nonradioactive metal dysprosium. Air samples were then collected throughout the city and the airborne mass of soot NP was estimated by neutron activation of the dysprosium.…”

Section: A1 Use Of Radionuclides To Characterize and Quantitate Nanomentioning

confidence: 99%

Radiation Safety Aspects of Nanotechnology

Hoover¹,

Myers²,

Cash³

et al. 2017

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