Abstract
The air change rates of motor vehicles are relevant to the sheltering effect from air pollutants entering from outside a vehicle and also to the interior concentrations from any sources inside its passenger compartment. We made more than 100 air change rate measurements on four motor vehicles under moving and stationary conditions; we also measured the carbon monoxide (CO) and fine particle (PM2.5) decay rates from 14 cigarettes smoked inside the vehicle. With the vehicle stationary and the fan off, the ventilation rate in air changes per hour (ACH) was less than 1 h−1 with the windows closed and increased to 6.5 h−1 with one window fully opened. The vehicle speed, window position, ventilation system, and air conditioner setting was found to affect the ACH. For closed windows and passive ventilation (fan off and no recirculation), the ACH was linearly related to the vehicle speed over the range from 15 to 72 mph (25 to 116 km h−1). With a vehicle moving, windows closed, and the ventilation system off (or the air conditioner set to AC Max), the ACH was less than 6.6 h−1 for speeds ranging from 20 to 72 mph (32 to 116 km h−1). Opening a single window by 3″ (7.6 cm) increased the ACH by 8–16 times. For the 14 cigarettes smoked in vehicles, the deposition rate k and the air change rate a were correlated, following the equation k=1.3a (R2=82%; n=14). With recirculation on (or AC Max) and closed windows, the interior PM2.5 concentration exceeded 2000 μg m−3 momentarily for all cigarettes tested, regardless of speed. The concentration time series measured inside the vehicle followed the mathematical solutions of the indoor mass balance model, and the 24-h average personal exposure to PM2.5 could exceed 35 μg m−3 for just two cigarettes smoked inside the vehicle.
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References
Daisey J.M., Mahanama K.R.R., and Hodgson A.T. Toxic volatile organic compounds in simulated environmental tobacco smoke: emission factors for exposure assessment. J Expo Anal Environ Epidemiol 1998: 8(3): 313–334.
Engelmann R.J., Pendergrass W.R., White J.R., and Hall M.E. The effectiveness of stationary automobiles as shelters in accidental releases of toxic materials. Atmos Environ 1992: 26A(17): 3119–3125.
Fletcher B., and Saunders C.J. Air change rates in stationary and moving motor vehicles. J Hazard Mater 1994: 38: 243–256.
Klepeis N.K., Nelson W.C., Ott W.R., Robinson J.P., Tsang A.M., Switzer P., Behar J.V., Hern S.C., and Engelmann W.H. “The National Human Activity Pattern Survey (NHAPS): a resource for assessing exposure to environmental pollutants”. J Expo Anal Environ Epidemiol 2001: 11: 231–252.
Klepeis N.K., Ott W.R., and Switzer P. A multiple-smoker model for predicting indoor air quality in public lounges. Environ Sci Technol 1996: 30(9): 2813–2820.
Mage D.T., and Ott W.R. Accounting for nonuniform mixing and human exposure in indoor environments. In: Tichenor, B.A., (ed.). Characterizing Sources of Indoor Air Pollution and Related Sink Effects, ASTM publication code number (PCN): 04-12870-17, American Society for Testing and Materials, West Conshohocken, PA, 1996, pp. 263–278.
Offermann F.J., Colfer R., Radzinski P., and Robertson J. Exposure to environmental tobacco smoke in an automobile. Proceedings of the 9th International Conference on Indoor Air Quality and Climate, Monterey, CA, June 30-July 5, 2002. Paper No. 2C3p1, pp. 2002, 506.
Ott W. Mathematical modeling of indoor air quality. In: Ott, W., Steinemann, A., and Wallace, L., (eds.). Exposure Analysis, Chapter 18 CRC-Press, Taylor & Francis, Boca Raton, FL, 2006.
Ott W., Langan L., and Switzer P. A time series model for cigarette smoking activity patterns: model validation for carbon monoxide and respirable particles in a chamber and an automobile. J Expo Anal Environ Epidemiol 1992: 2(Suppl. 2): 175–200.
Ott W.R., Switzer P., and Willits N. Carbon monoxide exposures inside an automobile traveling on an urban arterial highway. J Air Waste Manag Assoc 1994: 44: 1010–1018.
Park J., Spengler J.D., Yoon D., Dumyahn T., Lee K., and Özkayak H. Measurement of air exchange rate of stationary vehicles and estimation of in-vehicle exposure. J Expo Anal Environ Epidemiol 1998: 8(1): 65–78.
Rees V.W., and Connolly G.N. Measuring air quality to protect children from secondhand smoke in cars. Am J Prev Med 2006: 31(5): 363–368.
Rodes C., Sheldon L., Whitaker D., Clayton A., Fitzgerald K., Flanagan J., DiGenova F., Hering S., and Frazier C. Measuring concentrations of selected air pollutants inside California vehicles. Final Report, Califonria Air Resources Board Contract No. 95-339, Research Triangle Institute, Research Triangle Park, NC, 1998.
TSI. Model AM510 SidePak™ personal aerosol monitor user guide. 1980456, Revision B, May 2003, Appendix, B pp. 2003, 53–56.
Wallace L.A., and Smith K. Exposure to particles. In: Ott, W., Steinemann, A., Wallace, L., (eds.). Exposure Analysis, Chapter 8 CRC-Press, Taylor and Francis: Boca Raton, FL, 2006.
Acknowledgements
We are grateful to the Flight Attendant Medical Research Institute (FAMRI) for funding this research. Grateful appreciation also is extended to Pamela Shreve, Gloria Duenas, and Johnny Fonda for their personal help conducting this research.
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Ott, W., Klepeis, N. & Switzer, P. Air change rates of motor vehicles and in-vehicle pollutant concentrations from secondhand smoke. J Expo Sci Environ Epidemiol 18, 312–325 (2008). https://doi.org/10.1038/sj.jes.7500601
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DOI: https://doi.org/10.1038/sj.jes.7500601
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