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| Distribution and source identification of polycyclic aromatic hydrocarbon of surface sediments from the center part of South Yellow Sea, China |
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Abstract The 49 surface samples collected from the center part of South Yellow Sea were analyzed for total organic carbon (TOC), particle size, polycyclic aromatic hydrocarbons (PAHs) and methyl phenanthrene. The concentrations of all of 14 PAHs (ΣPAHs) were 81.63 to 6567.31 ng/g dry weight, and the concentrations of anthropogenic PAHs (ΣEPA PAHs) were 29.2 to 1029.1 ng/g, with an average of 255.1 ng/g, suggesting medium-low level pollution in studying area. The less correlations among ΣEPA PAHs, TOC and medium diameter (MD) indicates that atmospheric deposition or leakage of ship-borne petroleum may be main enrichment methods of pollution, comparing with fluvial transport. The concentrations of perylene relative to the penta-aromatic isomers are dominant, with 6.40%~88.85% of ΣPAHs, and the low concentrations of perylene were related by anthropogenic activity, while the high concentrations indicating diagenetic terrestrial origin. The characteristics of high weight compounds, isomers analysis and methyl phenanthrene revealed that the anthropogenic PAHs were mainly derived from combustion or incomplete combustion of coal and higher plants, however, some samples showed obvious petroleum features also confirm the existence of PAHs derived from leakage of petroleum fuel and crude oil.
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Received: 17 October 2012
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ZHANG Li, ZHANG Yuan, QI Shi-Hua, LI Hui, XING Xin-Li, ZHANG Ze-Zhou, ZHENG Huang, SUN Yan, MIN Yang. Characteristics of atmospheric PM2.5 and the variation of PAHs in PM2.5 during spring in Hongshan district, Wuhan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2319-2325. |
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