Abstract
Surface samples were collected from the Jen-Gen River mouth, Taiwan and analyzed for polycyclic aromatic hydrocarbons (PAHs). Total PAHs concentrations varied from 283 to 1,277 ng/g, with a mean concentration of 671 ng/g. The spatial distribution of PAHs reveals that the PAHs concentration is relatively high in the river mouth region, and gradually diminishes toward the harbor region. Diagnostic ratios showed that the possible source of PAHs in the Jen-Gen River mouth could be petroleum combustion. The toxic equivalent concentrations (TEQcarc) of PAHs varied from 43 to 169 ng TEQ/g. Higher total TEQcarc values were found in the river mouth region. As compared with the US Sediment Quality Guidelines (SQGs), the observed levels of PAHs at Jen-Gen River mouth were lower than the effects range low (ERL), and would probably not exert adverse biological effects.
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