Distribution characteristics and source tracing of petroleum hydrocarbons in the northeastern South China Sea |
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| Institution: | 1. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;2. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;3. Department of Atmospheric and Oceanic Sciences and Institute of Atmospheric Sciences, Fudan University, Shanghai 200433, China;4. Innovation Center of Ocean and Atmosphere System, Zhuhai Fudan Innovation Research Institute, Zhuhai 518057, China;1. Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. China ENFI Engineering Corporation, Beijing 100038, China;4. China Academy of Urban Planning and Design, Beijing 100037, China;1. MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;2. School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China;3. Department of Chemistry, Tianjin University, Tianjin 300072, China;1. State Key Laboratory of Petroleum Resources and Prospecting, College of Geosciences, China University of Petroleum, Beijing 102249, China;2. Research Institute of Petroleum Exploration and Development, Tarim Oilfield Company, PetroChina, Xinjiang, Korla 841000, China;1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China;2. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;3. Key Laboratory of Isotope Geochronology and Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;4. Key Laboratory of Natural Resource of the Changbai Mountain and Functional Molecular of Ministry of Education, Yanbian University, Yanji 133002, China |
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| Abstract: | In recent years, oil spills caused by human activities have occurred frequently, and the resultant oil pollution has received extensive attention worldwide. In this paper, a total of 50 water samples were collected from the northeastern part of the South China Sea, and total petroleum hydrocarbons (TPHs) and n-alkane content in the samples were analyzed by gas chromatography-flame ionization detector (GC-FID) technology. The petroleum hydrocarbon characteristic indices, such as carbon predominance index (CPI) and terrigenous/aquatic ratio (TAR), were calculated to trace the source of petroleum hydrocarbons. The measured value of TPHs ranged from 121.31–603.02 μg/L. For surface waters, the TPHs in the northern coastal waters and the central waters were higher than that in the far shore. For vertical waters, the TPHs sharply decreased at first, and then increased slowly and finally reached a steady state. The n-alkanes in the water samples were concentrated in C10-C38, and they were mainly from terrestrial higher plant. The waters in the near shore, mid-layer and deep sea showed a strong reducing terrestrial characteristic, while the surface waters in the open sea showed an obvious oxidizing endogenous characteristic. |
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| Keywords: | Petroleum hydrocarbons South China Sea Oil spill Source tracing |
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