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Sun R.-X.,CAS South China Sea Fisheries Research Institute | Sun R.-X.,Key Laboratory of Fishery Ecology and Environment of Guangdong Province | Sun R.-X.,Key Laboratory of Ministry of Agriculture for South China Sea Fishery Resources Exploitation and Utilization | Sun R.-X.,CAS Guangzhou Institute of Geochemistry | And 15 more authors.
Marine Pollution Bulletin | Year: 2015

Polycyclic aromatic hydrocarbons (PAHs) were investigated in the marine ecosystem of the Daya Bay, South China. The PAH concentrations ranged from 340 to 710ng/g dry weight in the sediments and from 110 to 520ng/g wet weight in marine organisms, respectively. The dominant compounds were three- and four-ring PAHs in the sediments (53%-89%) and two- and three-ring PAHs in the marine species (67%-94%), respectively. PAHs mainly originated from both pyrolytic and petrogenic sources. Comparison with the effects-based sediment quality guideline values suggested that the ecological risk caused by the total PAHs was relatively low (less than 25% incidence of adverse effects) in the sedimentary environment. The median cancer risk level via seafood consumption (1.6×10-5 for urban residents and 1.2×10-5 for rural residents, respectively) was slightly higher than the maximum admissible level (10-5) set by US EPA, but lower than the priority risk level (10-4). © 2016 Elsevier Ltd.

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