| Summary: | 碩士 === 中原大學 === 土木工程研究所 === 100 === This study aims to assess lifetime health risk associated with concentrations of heavy metal lead that emitted from stationary pollution sources in ambient air in Taoyuan County using air dispersion model - American Meteorology Society / Environmental Protection Agency Regulatory Model (AERMOD) and Hotspots Analysis and Reporting Program (HARP). Lifetime cancer risks in inhalation pathway were conducted for various age (0-18 years and 19-70 years old) and sex stratifications. Exposure scenarios of heavy metal lead was also evaluated for their measurements at 5, 50 and 95 percentiles.
The AERMOD simulated concentrations of heavy metal lead in Taoyuan County in 2007 and found the first high annual average concentration in Luzhu. After comparing simulated concentrations and monitoring records of Taoyuan environmental protection agency, the present study found the ratio of simulation and observed is lower in Taoyuan, Neiding and Luzhu that indicated their accurateness were better than other areas.
The HARP estimated lifetime cancer risk for lead in inhalation pathway were ranged from 5×10-9 to 5×10-5 in Taoyuan County, and ranged 1×10-6 to 5×10-5 in Taoyuan, Luzhu and Jungli. This study suggested that the dispersion concentrations of heavy metal lead was higher in some study areas because the limited weather monitoring station and effects of regional convection cannot be estimated in AERMOD, therefore, lead to the higher health risk in inhalation pathway.
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