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DOI: https://doi.org/10.4491/eer.2022.043
Occurrence, distribution and risk Assessment of PAHs in road dust sediment in Daejeon metropolitan city, South Korea
Gain Lee1,2, Yong-Chul Jang1, Kyunghoon Choi1, Hongkyoung Kim1,2, Seungmin Ji1, Byeonghwan Kim1, Youngsun Kwon1, and Ho-Sang Shin3
1Department of Environmental & IT Engineering, Chungnam National University, Daejeon 34134, South Korea
2Risk Assessment Division, Environmental Health Research Department, National Institute of Environmental Research, Incheon 22689, South Korea
3Department of Environmental Education, Kongju National University, Chungnam 32588, South Korea
Corresponding Author: Yong-Chul Jang ,Tel: +82428216674, Email: gogator@cnu.ac.kr
Received: January 26, 2022;  Accepted: April 18, 2022.
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ABSTRACT
In this study, the occurrence and distribution of polycyclic aromatic hydrocarbons (PAHs) in road dust sediment (RDS) deposited from main traffic roads as well as residential and industrial areas were examined with a total of 144 samples in seasons. Based on the results, the concentrations of PAHs were found to be higher in winter and ranged between 0.15 and 1.94 mg/kg with an average of 0.65 mg/kg. The results indicate that pyrene, fluoranthene, phenanthrene, and benzo(ghi)perylene were commonly found in RDS, likely originated from vehicle exhaust emissions and fuel combustion by the diagnostic ratio study. Non-cancer risk from PAHs for humans exposed to RSD was found to be low (HI 1.2E-05). The estimated excess cancer risks by PAHs in RDS was also much less than the regulatory guideline for cancer risk (1 × 10-6). Thus, current concentrations of PAHs in RDS are expected to be pose no threat to humans under the assumed exposure scenarios with applied exposure factors. However, more extensive and long-term sample analysis for gaseous and particulate PAHs is still warranted to determine potential risks to humans and the fate in the environment, since their concentration and distribution can be influenced by micro-metrological conditions, traffic volumes, or road clean-up conditions.
Keywords: Distribution | PAHs | Risk assessment | Road dust sediment
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