自然风化条件下原油中金刚烷的风化规律
Change of diamondoid compounds in crude oils under natural weathering conditions
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摘要: 以渤海2个原油作为研究对象进行自然风化实验,探讨了原油中金刚烷化合物的分布情况及其风化规律.结果表明,经过100 d的室外自然风化,原油中金刚烷的分布已经发生了较大的改变:风化损失程度与金刚烷化合物的沸点有关,风化初期单金刚烷损失严重,风化45 d,单金刚烷完全消失;双金刚烷浓度变化较小,有较好的抗风化稳定性;通过t检验分析,所选取诊断比值中,单金刚烷指标A6、A8、A12和双金刚烷指标A16、A17、A18较为稳定,能很好地指示自然风化20 d内油样的来源;双金刚烷指标A17、A18风化100 d非常稳定,可用于长期自然风化油样来源鉴别,金刚烷化合物诊断比值对于溢油鉴别具有重要的意义.Abstract: This paper describes the changes of some diamondoid compounds in two crude oils from Bohai Sea during natural long-term weathering. The results show that the distribution patterns of diamondoid compounds in the crude oils changed greatly after 100 day natural weathering. The loss of the diamondoids during natural weathering was largely determined by their boiling points. The adamantane concentrations decreased significantly at the begining of weathering. Adamantanes were not found after 45 day natural weathering. The concentrations of diamantanes decreased slightly with weathering time, and the diamantanes had stronger weathering-resistant capabilities. According to the "Student's t" statistics,the ratios of A6,A8,A12,A16,A17 and A18 had no apparent changes, and can be used as an indicator for the source of the samples during the first 20 day weathering. Diamantanes ratios of A17,A18 were essentially constant after 100 days natural weathering, and can therefore be used as an indicate for the source of the samples during long-term weathering.Our results suggest that the diamondoid group can provide useful diagnostic means for oil spill source identification.
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Key words:
- crude oil /
- diamondoid /
- natural weathering /
- diagnostic ratio
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[1] Wang Z D,Fingas M. Study of the effects of weathering on the chemical composition of a light crude oil using GC/MS and GC/FID[J]. Microcolumn Sep, 1995, 7:617-639 [2] Weise A M, Nalewajko C, Lee K. Oil-mineral fine interactions facilitate oil biodegradation in seawater[J]. Environmental Technology,1999, 20: 811-824 [3] 赵云英,杨庆霄.溢油在海洋环境中的风化过程[J]. 海洋环境科学,1997,16(1):45-52 [4] 倪张林,马启敏,富丽锟,等.利用GC和GC／MS对溢油风化的鉴定[J]. 环境化学,2008,27(2):256-259 [5] 杨佰娟,徐晓琴,李庆玲,等.气相色谱质谱联用技术在海面溢油事故鉴别中的应用——案例分析[J]. 海洋环境科学,2008,27(6):661-665 [6] Grice K, Alexander R, Kagi R. Diamondoid hydrocarbon ratios as indicators of biodegradation in Australian crude oils [J].Org Geochem, 2000,31(1):67-73 [7] Alimi H, Ertel T, Schug B. Fingerprinting of hydrocarbon fuel contaminants: literature review[J]. Environmental Forensics,2003, 4 (1):25-38 [8] Wang Z D, Yang C, Hollebone B P, et al. Forensic fingerprinting of diamondoids for correlation and differentiation of spilled oil and petroleum products[J].Environ Sci Technol,2006,40(18):5636-5646 [9] Yang C, Wang Z D, Hollebone B P.GC/MS quantitation of diamondoid compounds in crude oils and petroleum products[J].Environmental Forensics,2006,7(4):377-390 [10] Wei Z B, Moldowan J M, Peters K E, et al.The abundance and distribution of diamondoids in biodegraded oils from the San Joaquin Valley: Implications for biodegradation of diamondoids in petroleum reservoirs [J]. Org Geochem,2007,38:1910-1926 [11] 张魁英,杨佰娟,郑立,等.基于原油中金刚烷指纹半定量分析进行原油鉴别[J]. 分析化学,2011,39(4):496-500 [12] 孙培艳,高振会,崔文林,等.油指纹鉴别技术发展及应用[M]. 北京:海洋出版社,2007:116 [13] 徐晓琴.海洋环境中有机污染物的分析与示踪技术研究. 厦门:厦门大学博士学位论文,2007:163 -
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