광양만 동물플랑크톤 중 PAHs의 농도 및 축적 특성

Abstract

Samples of zooplanktons (n = 15) and seawater (n = 5) were collected between Jun 2001 and February 2002 in Gwangyang Bay to examine PAHs accumulated in zooplankton. Total PAHs concentration in zooplankton varied 18.9 - 143 ng/g wet weight and showed elevated levels in the east side of the bay. Total PAHs in seawater was in the range of 24.3 - 128 ng/L and showed similar spatial distribution with zooplankton. Petrogenic PAHs derived from ships' activity and domestic, industrial sewage was proposed as the dominant source of PAHs accumulated in zooplankton, while pyrogenic PAHs were also detected depending on the season. The relationship between bioconcentration factor (BCF) and octanol-water partition coefficient (Kow) observed for the zooplankton was linear (slope = 0.97). Concentrations of total PAHs in bivalves were two times higher than those of zooplankton when normalized by lipid contents. These results suggest that PAHs concentrations in zooplankton likely to reflect water concentrations and that PAHs may biomagnify in the lower trophic level.