Sang Hoon Yoon1*·Woo Jin Lee1·Min Hwa Lim1·Yeon Jae Jeong1·Mi Ae Park1· Hong Dae Jeon1·Byoung Hoon Park1·Gwang Yeob Seo1·Seok Jin Bae1·Jeong Hun Park2
1Health and Environment Research Institute of Gwangju, Gwangju, Korea
2Department of Environment and energy Engineering, Chonnam National University
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The concentration levels and distribution characteristics of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated and evaluated for total 100 soil samples as a part of the survey on soil contamination in Gwangju. The results (median and range) of T-PAHs (sum of 16 PAH concentrations), C-PAHs (sum of carcinogenic PAH concentrations) and T-TEQs (sum of 16 TEQ concentrations) were 20.8 (7.6~1158.1), 2.2 (N.D~509.6), and 0.3 (N.D~424.6) mg/kg, respectively. There was a positive correlation between C-PAHs/T-PAHs and T-TEQs/T-PAHs except one point where the concentration of benzo(a)pyrene was high. The ratios of the C-PAHs/T-PAHs were 31.7% for low molecular weight-PAHs and 68.3% for high molecular weight-PAHs, suggesting that PAHs generation mainly arose from combustion sources. The ratio of isomers of individual PAHs, Phe/Ant, Flu/Pyr, Ant/(Ant+Phe), Flu/(Flu+Pyr), and BaA/(BaA+Chr), also confirmed the predominance of PAHs from combustion activities. Statistical tracing of the source of PAHs through principal component analysis indicated that the main sources of combustion were automobile fuel and coal. The overall results of this study suggested HMW-PAHs, T-PAHs, C-PAHs and T-TEQs should be separately evaluated to better assess the toxicity and environmental behavior of individual PAHs.
Keywords: PAHs, Soil, Combustion, Generation, Statistical tracing
2022; 27(2): 50-60
Published on Apr 30, 2022
Health and Environment Research Institute of Gwangju, Gwangju, Korea