摘要
将胜利和塔西两种原油以不同比例混合后置于人工气候箱进行风化模拟实验,采用气相色谱质谱联用仪（GC-MS）检测风化样品中的生物标志化合物,探讨和揭示短期风化作用对混合溢油常用的甾萜类和多环芳烃诊断指标的影响。结果表明经过15d的短期风化,在混源比例大于10%时,各系列混合油样的甾萜类生物标志物诊断指标与单一油品的相关诊断比值的差异性和混源油品比例值呈明显正相关。各系列混合油样中的常用萘及烷基萘等指标不适宜作为短期溢油来源鉴别的指标,但可以作为溢油是否发生混合的间接判定指标。根据常用的多环芳烃相关诊断指标,可将各系列油样的短期风化模式依据混源油品中塔西油田原油所占比例大致分为3类（20%~50%、10%和0%）。多环芳烃系列诊断指标的相对标准偏差（RSD%）与混源油品比例有关,混源塔西油样的比例越高,PAHs系列指标的RSD%越大,稳定性越差。
Oil collected from Tarim oilfield was poured with different proportions into oil collected from Shengli oilfield.The mixed oil samples were placed in an artificial climate chamber to simulate a short term weathering process and reveal short-term weathering effects on conventional biomarker diagnostic indicators of terpenes,steroids and PAHs（polycyclic aromatic hydrocarbons）in these mixed oil samples.When the mixing ratio is more than10%,the diversity of terpenes and steroids diagnostic indicators between mixed oils samples and single samples is positively correlated with the pour weight ratios.The fact that substantial changes after weathering process have happened in conventional ratios of naphthalene and alkyl naphthalene in these series of mixed oil samples indicates that these ratios are unsuitable as short term indicators,but they can be used to determine indirectly whether an oil spill occurred are mixed or not.According to short-term weathering patterns of conventional PAHs ratios,these series of mixed oil samples can be broadly divided into three categories：0%,10% and 20%-50%.The stability of RSD% of PAHs ratios in these series of oil samples are negatively correlated to the pour weight ratios.
出处
《海洋学报》
CAS
CSCD
北大核心
2015年第2期1-10,共10页
基金
国家自然科学基金资助项目(41206089
40806048)
中国科学院(烟台台海岸带所)135课题培育项目-海岸带灾害风险与预警(Y455011031)
中国科协政策研究类课题资助:我国近海养殖水域环境污染问题研究(2010JYXC-8)
关键词
混合原油
甾萜烷
多环芳烃
短期风化
诊断比值
mixed oils
Biomarker of terpanes
steranes and PAHs
short-term weathering simulation experiment
diagnostic ratios
