Regional Inhaled Deposited Dose of Urban Aerosols in an Eastern Mediterranean City

Atmosphere

Jakob Löndahl¹  Tareq Hussein²  Shatha Suleiman Ali Saleh²  Antti J. Koivisto³  Vanessa N. dos Santos³  Brandon E. Boor⁴ 

[1] Department of Design Sciences, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden;Department of Physics, The University of Jordan, Amman 11942, Jordan;Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, PL 64, FI-00014 UHEL Helsinki, Finland;Lyles School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA;

关键词: dose rate;    lung deposition;    particulate matter (PM);    particle number;    ultrafine particles;    exposure;    urban air quality;    Middle East and North Africa (MENA);   

DOI  :  10.3390/atmos10090530

来源: DOAJ

【 摘 要 】

We calculated the regional deposited dose of inhaled particulate matter based on number/mass concentrations in Amman, Jordan. The dose rate was the highest during exercising but was generally lower for females compared to males. The fine particles dose rate was 10¹⁰–10¹¹ particles/h (10¹–10² µg/h). The PM₁₀ dose rate was 49–439 µg/h for males and 36–381 µg/h for females. While resting, the PM₁₀ deposited in the head airways was 67–77% and 8–12% in the tracheobronchial region. When exercising, the head airways received 37–44% of the PM₁₀, whereas the tracheobronchial region received 31–35%. About 8% (exercise) and 14–16% (rest) of the PM_2.5 was received in the head airways, whereas the alveolar received 74–76% (exercise) and 54–62% (rest). Extending the results for common exposure scenarios in the city revealed alarming results for service workers and police officers; they might receive PM2.5 and 220 µg/h PM₁₀ while doing their duty on main roads adjacent to traffic. This is especially critical for a pregnant police officer. Outdoor athletic activities (e.g., jogging along main roads) are associated with high PM_2.5 and PM₁₀ dose rates (100 µg/h and ~425 µg/h, respectively).

【 授权许可】

Unknown