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http://dx.doi.org/10.14249/eia.2020.29.4.286

Human Health Risk Assessment of Polycyclic Aromatic Hydrocarbons (PAHs) from Road Dust Sediments in Korea  

Lee, Gain (Department of Environmental Engineering, Chungnam National University)
Kim, Hongkyoung (Department of Environmental Engineering, Chungnam National University)
Ji, Seungmin (Department of Environmental Engineering, Chungnam National University)
Jang, Yong-Chul (Department of Environmental Engineering, Chungnam National University)
Publication Information
Journal of Environmental Impact Assessment / v.29, no.4, 2020 , pp. 286-297 More about this Journal
Abstract
This research studied human health risk assessment of PAHs (Polycyclic Aromatic Hydrocarbons) in road dust sediments collected from 6 sites in four different cities in Korea. PAHs are well known to be human carcinogens and toxic compounds that are commonly generated from incomplete combustion of fuels and energy products. Such compounds which is absorbed by atmospheric suspended dust can be emitted into air in gaseous form and often deposited on road dust sediments. The PAHs which is deposited on sediment particles can also be re-dispersed by vehicles or winds on the road surface. It can be harmful for humans when exposed via breathing, ingestion and dermal contact. This study examined human health risk assessment of PAHs in deposited road dust sediments. Results showed that the excess cancer risk estimates were above 1.0×10-6 at main traffic roads and resident area in Ulsan city. According to the result of deterministic risk assessment, dermal-contact was the major pathway, while the contribution of the risk from inhalation was less than 1%. The probabilistic risk assessment showed similar levels of cancer risk derived from the deterministic risk assessment. The result of sensitivity analysis reveal that exposure time is the most contributing factor (69%). Since the values of carcinogenic risk assessment were higher than 1.0 × 10-6, further detailed monitoring and refined risk assessment for PAHs may be required to identify more reliable and potential cancer risks for those who live in the study locations in Ulsan city.
Keywords
Polycyclic aromatic hydrocarbons; road dust sediments; probabilistic risk assessment; risk assessment;
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