| WANG Chuanyuan,HU Xiaoke,HE Shijie,LIU Xin,ZHAO Mingming. 2013. Source diagnostic and weathering indicators of oil spills utilizing bicyclic sesquiterpanes. Acta Oceanologica Sinica, 32(8):79－84 |
| Source diagnostic and weathering indicators of oil spills utilizing bicyclic sesquiterpanes |
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| Received:April 20, 2012 Revised:December 22, 2012 |
| DOI：10.1007/s13131-013-0344-y |
| Key words:bicyclic sesquiterpanes distribution diagnostic indices weathering oil spill source identification |
| 中文关键词: |
| 基金项目:Key Projects in the Yantai Science & Technology Pillar Programunder contract No. 2011060; the National Natural Science Foundation of China under contract Nos 40806048 and 41206089; Hundred Talents Programof Chinese Academy of Sciences. |
| Author Name | Affiliation | E-mail | | WANG Chuanyuan | Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China | cywang@yic.ac.cn | | HU Xiaoke | Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China | | | HE Shijie | College of Geography and Planning, Ludong University, Yantai 264025, China | | | LIU Xin | Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China | | | ZHAO Mingming | Key Laboratory of Coastal Zone Environmental Processes, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China | |
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| Abstract: |
| Bicyclic Sesquiterpanes (BSs) are ubiquitous components of crude oils and ancient sediments. BSs in crude oils and diesel oil were identified and characterized, the effects ofmoderate weathering on BS distributions were discussed, and amethodology using diagnostic indices of BSswas developed for oil correlationand differentiation. The results showed that crude oils and oil products had different abundances and distributions of BSs and, consequently, resulted in different diagnostic ratios. The selected diagnostic ratio indices of BSs, such as BS4/BS5 (ratio of 4,4,8,9,9-pentamethyl-decahydronaphthalene to 8β(H)-drimane), BS6/BS5 (ratio of 4,4,9,9,10-pentamethyl-decahydronaphthalene to 8β(H)-drimane), BS8/BS9 (ratio of the second peak to the third peak of C16 sequiterpane), and BS8/BS10 (ratio of C16 sequiterpane to 8β(H)-homodrimane), still maintained better stabilities (%RSD < 5%) after weathering for 30 d. The longer weathering process (150 d) had some effect on such ratios (5% < %RSD < 10%). The facts of the uniqueness, abundance in petroleum, and chemical stability of BSs enable them to be suitable as an effective diagnostic means for identifying spilled oil with moderate weathering, particularly for lighter refined product samples that are difficult to identify by current techniques. |
| 中文摘要: |
| Bicyclic Sesquiterpanes (BSs) are ubiquitous components of crude oils and ancient sediments. BSs in crude oils and diesel oil were identified and characterized, the effects ofmoderate weathering on BS distributions were discussed, and amethodology using diagnostic indices of BSswas developed for oil correlationand differentiation. The results showed that crude oils and oil products had different abundances and distributions of BSs and, consequently, resulted in different diagnostic ratios. The selected diagnostic ratio indices of BSs, such as BS4/BS5 (ratio of 4,4,8,9,9-pentamethyl-decahydronaphthalene to 8β(H)-drimane), BS6/BS5 (ratio of 4,4,9,9,10-pentamethyl-decahydronaphthalene to 8β(H)-drimane), BS8/BS9 (ratio of the second peak to the third peak of C16 sequiterpane), and BS8/BS10 (ratio of C16 sequiterpane to 8β(H)-homodrimane), still maintained better stabilities (%RSD < 5%) after weathering for 30 d. The longer weathering process (150 d) had some effect on such ratios (5% < %RSD < 10%). The facts of the uniqueness, abundance in petroleum, and chemical stability of BSs enable them to be suitable as an effective diagnostic means for identifying spilled oil with moderate weathering, particularly for lighter refined product samples that are difficult to identify by current techniques. |
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