MASS SIZE DISTRIBUTIONS OF FINE PARTICULATE MATTER FROM COOKING AND ESTIMATION OF THE DEPOSITION IN THE HUMAN RESPIRATORY SYSTEM

摘要

Particulate mass size distributions during cooking and non-cooking periods in three Indian urban household kitchens were measured. Based on these mass size distributions, fraction of particulate deposition in the respiratory system were calculated for a healthy Indian female under light physical exertion condition by a deterministic lung deposition model. Cooking generated very high concentration of particles, 4 to 5 times more than the non-cooking periods. Cooking generated particles predominantly in accumulation mode (0.05-0.2μm) whereas during non-cooking periods particulates found in coarse mode. Also, during frying process, the particulates were found to have a predominant coarser/droplet mode with MMADs 0. 096±0.004μm and 0.64±0.11μm with GSDs 1.41±0.07 and 2.25±0.2 respectively. The deterministic model used in this study has been modified to incorporate respiratory physiological parameters. The highest deposition was observed in pulmonary region during cooking periods, regardless of variation in cooking conditions. The respiratory deposition has shown significant relationship with physiological parameters that varied between different geographical regions inside the country.