Abstract
Polycyclic aromatic hydrocarbons (PAHs) are one of many marine contaminants. Surface water samples were collected at 15 sites in the southeastern Japan Sea along the Japanese archipelago, and PAHs were found in the dissolved phase (DP) and particulate phase (PP). The mean total (DP + PP) PAH concentrations ranged from 6.83 to 13.81 ng/L. The mean PAH concentrations in the DP and PP were 5.99 and 3.38 ng/L, respectively. Three-ring PAHs predominated in the DP, while the proportion of four-ring PAHs was higher in the PP. The mean total PAH concentrations in the southeastern Japan Sea were higher than the concentrations in the northwestern Japan Sea. The Tsushima Current, which originates from the East China Sea, has higher PAH concentrations and is considered to be responsible for this higher concentration in the northwestern Japan Sea.
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