Indoor Outdoor Aerosol Measurements for Two Residential Buildings in New Jersey
Titel:
Indoor Outdoor Aerosol Measurements for Two Residential Buildings in New Jersey
Auteur:
Tu, Keng-Wu Knutson, Earl O.
Verschenen in:
Aerosol science and technology
Paginering:
Jaargang 9 (1988) nr. 1 pagina's 71-82
Jaar:
1988
Inhoud:
Indoor /outdoor aerosols were studied in two residential homes in New Jersey by making hourly measurements of the concentration and particle size for 2 week intervals in the wintertime. Indoor particle concentrations ranged from 104 to 107 cm-3 and were highly dependent on household activities, including cooking, cigarette smoking, and use of a fireplace and a kerosene space heater. Besides producing large amounts of particles, the kerosene space heater also produced concentrations of carbon dioxide, up to 3000 ppm, and carbon monoxide, up to 9 ppm. The ratio of indoor/outdoor aerosol concentrations varied from 0.2 to 41 (correlation coefficients < 0.3), consistent with the low air infiltration rate measured (0.3-0.5 air changes/h). The results indicate that indoor particles were mainly from indoor origins. In addition, radon progeny particle-size distributions were calculated by applying the attachment theory to the measured aerosol size distribution. This mode was found to range from 0.04 to 0.1 μm, a range that is broader than the conventional results, which show the mode at around 0.1 μm.
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