Concentrations and possible sources of PAHs in sediments from Bohai Bay and adjacent shelf |
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| Authors: | Ningjing Hu Xuefa Shi Jihua Liu Peng Huang Yanguang Liu Ying Liu |
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| Affiliation: | (1) Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, 266061 Qingdao, China;(2) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China;(3) Suzhou Institute for Advanced Study, University of Science and Technology of China, 215000 Suzhou, China |
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| Abstract: | Concentrations, spatial distribution and sources of 16 polycyclic aromatic hydrocarbons (PAHs) listed by the United States Environmental Protection Agency as priority pollutants were investigated in surface sediments of Bohai Bay, North China. Total concentrations of PAHs were in the range of 140.6–300.7 ng/g (dry wt), with an average of 188.0 ng/g. The three predominant PAHs were phenanthrene, acenaphthene and naphthalene. Sedimentary PAH concentrations of the north and central Bohai Bay were higher than those of the southern side of this bay. PAHs source analysis suggested that PAHs in most of the sediments were mainly from grass, wood and coal incomplete combustion. At other stations near the estuaries (Luanhe River Estuary and Chaohe River Estuary) or the oil drilling platform, both petrogenic and pyrogenic inputs were significant. The pyrogenic PAHs close to the oil drilling platform were mainly from petroleum combustion. |
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