Contributions of Chinese-style cooking and incense burning to personal exposure and residential PM concentrations in Taiwan region.
We investigated the effect of indoor sources including Chinese-style cooking, incense burning, cleaning, and people's moving on indoor particle size distributions and concentrations and calculated the personal exposure dose rates in the human respiratory tract (HRT) using time-activity and indoor and outdoor particle size distribution data collected from a traditional Taiwanese residence in central Taiwan region. We applied a simple size-dependent indoor air quality model associated with a compartmental lung model to determine the source emission rates and exposure dose. Cooking and incense burning had size-integrated source emission rates of 0.042+/-0.024 (mean+/-S.D.) and 0.038+/-0.026 particles s(-1), respectively. Cooking and incense burning were significant contributors to indoor particle levels for particle sizes from 0.5 to 5 microm in that the percent contributions to indoor concentrations were 0.334+/-0.02 and 0.267+/-0.035, respectively. Our results demonstrated that extrathoracic (ET) region had higher average PM mass lung/indoor ratio (0.77) than that of bronchial (BB) (0.52), bronchiolar (bb) (0.27) and alveolar-interstitial (AI) (0.14) regions from both cooking and incense burning events. The average integrated deposition dose rates (particles cm(-2) h(-1)) of 24.11 in ET, 4.68 in BB, and 7.89 in bb were higher than that of 0.011 in AI for both cooking and incense burning events. This research illustrates that exposure assessment based on time-activity and real-time behavior of particle data can provide valuable information on the fate of indoor particles and hazard to human health.
Liao
Chung-Min
CM
Ecotoxicological Modeling Center, Department of Bioenvironmental Systems Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China. cmliao@ntu.edu.tw
Chen
Szu-Chieh
SC
Chen
Jein-Wei
JW
Liang
Huang-Min
HM
D000203:Activities of Daily Living; D016902:Air Pollution, Indoor / Q000032:analysis*; D003296:Cooking; D005390:Fires; D006801:Humans; D019570:Inhalation Exposure; D010316:Particle Size; D011650:Pulmonary Alveoli / Q000737:chemistry; D012067:Religion; D013624:Taiwan