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Estimating Human Exposure to Benzo(a)pyrene through Multimedia/Multiroute Exposure Scenario  

Moon Ji Young (연세대학교 보건대학원 환경보건학과)
Yang Ji Yeon (연세대학교 환경공해연구소)
Lim Young Wook (서남대학교 환경보건학과)
Park Seong Eun (㈜엔바이오니아)
Shin Dong Chun (연세대학교 환경공해연구소)
Publication Information
Environmental Analysis Health and Toxicology / v.18, no.4, 2003 , pp. 255-269 More about this Journal
Abstract
The objective of this study was to estimate human exposure to benzo (a)pyrene through multimedia/multi-pathway exposure scenario. The human exposure scenario for benzo(a)pyrene was consisted of 12 multiple exposure pathways, and the multipathway human exposure model based on this scenario constituted. In this study, the multipathway human exposure model was used to estimate the concentrations in the exposure contact media, human intake factors and lifetime average daily dose (LAD $D_{model}$) of benzo(a)pyrene in the environment. Sensitivity analysis was performed to identify the important parameters and Monte-Carlo simulation was undertaken to examine the uncertainty of the model. The total LAD $D_{model}$ was estimated to be 5.52${\times}$10$^{-7}$ mg/kg-day (2.06${\times}$10$^{-7}$ -8.65${\times}$10$^{-7}$ mg/kg-day) using the multipathway human exposure model. The inhalation dose accounted for 78% of the total LADD, whereas ingestion and dermal contact intake accounted for 20.2% and 1.8% of the total exposure, respectively. Based on the sensitivity analysis, the most significant contributing input parameter was benzo (a)pyrene concentration of ambient air. Consequently, exposure via inhalation in outdoor/indoor air was the highest compared with the exposure via other medium/pathways.
Keywords
benzo(a)pyrene; PAHs; lifetime average daily dose (LADD); multimedia/multipathway human exposure;
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