Environmental quality of petroleum hydrocarbons in the surface sediment of the oil and gas exploration zone in the central of Bohai Sea
LIU Ming1,2, ZHANG Ai-bin1, LIAO Yong-jie1,3, FAN De-jiang1
1. Key Laboratory of Submarine Geosciences and Technology of Ministry of Education, Ocean University of China, Qingdao 266100, China;
2. Key Laboratory of Marine Sedimentology & Environmental Geology, SOA, Qingdao 266061, China;
3. State Oceanic Administration Key Laboratory of Sea-area Management Technology, SOA, Dalian 116083, China
Abstract：The concentrations of petroleum hydrocarbons (PHs) from the surface and core sediments, which collected from oil and gas exploration area in central Bohai Sea, were analyzed, and their environmental quality was evaluated. The results showed that the PHs contents in surface sediments ranged from 10.15×106 to 151.72×106, with an average of 55.99×106 in the study area. Most stations are medium pollution, some stations appear higher and severe pollution. High PHs value areas locate in the Bohai Bay coast, indicating that PHs contamination is significantly affected by coastal human sewage and oil and gas extraction. Before the 1930s, the PHs concentrations were in a low background value, following by an increasing trend resulting from the impact of human activities. The PHs evolution in the area agrees with the development periods of oil and gas exploration in the Bohai Sea. The oil spill event of the Platform Penglai 19-3 in June 2011 has affected the adjcent sediments obviously, but the impact has significantly reduced after 1 year.
LIU Ming,ZHANG Ai-bin,LIAO Yong-jie et al. Environmental quality of petroleum hydrocarbons in the surface sediment of the oil and gas exploration zone in the central of Bohai Sea[J]. Marine Environmental Science, 2015, 34(1): 12-16.
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