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Abstract
This study was carried out from the Gwangan Bridge in Busan, Korea in order to examine the characteristics and the amount of PAHs in runoff from Gwangan Bridge, and the consequential PAH burdens in the ocean. The runoff samples were collected in particulate and dissolved phase, and the ambient air samples were collected in particulate and gaseous phase. In this study, 20 samples were collected from 10 different sites. The concentrations of 16 PAHs, in particulate road surface samples, ranged from 76.71 to 170.98 ng/g, and the dissolved road surface runoff samples ranged from 23.31 to 72.9 ng/L. In ambient air, the PAHs concentration in gaseous phase was higher than the samples in particulate phase. From these results, the amount of annual release of PAHs through runoff into the coast was calculated, and the Toxic Potency Equivalency Factors and Dioxin Toxic Equivalency Factors were applied. The annual release of total PAHs and the carcinogenic PAHs via runoff from Gwangan Bridge to the coast were 14.1 g/yr and 3.13 g/yr, respectively. The PAHs-TPEQ was 0.85 g/yr and the PAH-dioxin TEQ was 0.69 mg/yr.