Fate of polycyclic aromatic hydrocarbon(PAH)contamination in a mangrove swamp in Hong Kong following an oil spill

摘要

The fate of polycyclic aromatic hydrocarbon(PAH)contamination in a mangrove swamp(Yi O)in Hong Kong after an oil spill 10 m×10m)covering different degrees of oil contamination and the most contaminated mangrove leaves were examined in De- cember 2000(30 days after the accident)and March 2001(126 days later). The concentrations of total PAHs in surface sediments ranged from 138 to 2135 ng g~-1, and PAHs concentrations decreased with time. In the most contaminated sediments, total PAHs dropped from 2135(30 days)to 1196 ng g~-1(120 days), and the decrease was smaller in less contaminated sediments.