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在一定条件下,分别对添加消油剂的原油和重质燃料油进行了风化模拟实验,采用气相色谱质谱联用(GC-MS)对风化样品中的生物标志化合物进行了检测,通过生物标志化合物特征比值的变化趋势,对以往溢油鉴别过程中常规生物标志化合物特征比值进行筛选.结果表明,在溢油经消油剂处理后,以往经常选用的指纹信息(主峰碳数、CPI、(C21+C22)/(C28+C29)、C21前/C22后、Pr/Ph(姥鲛烷/植烷)、Pr/C17、Ph/C18)受到消油剂中相关组分的干扰,失去指示意义;消油剂加剧了某些多环芳烃及其烷基化系列生物标志化合物的风化作用,使与其相关的生物标志化合物比值(C2-D/C2-P、C3-D/C3-P、ΣP/ΣD、2-MP/1-MP、4-MD/1-MD)失去指示意义;绝大部分甾、萜烷类生物标志化合物的抗风化能力较强,相关比值仍具有较好的指示意义.
Under certain conditions, the weathering simulation experiments were carried out on the crude oil and heavy fuel oil added with the oil dispersant respectively. The biomarkers in the weathered samples were detected by gas chromatography-mass spectrometry (GC-MS) The results showed that the fingerprints (the carbon number of the main peak, CPI, ( Pr / Ph (Pristane / Phytanide), Pr / C17, Ph / C18) were disturbed by relevant components in the dispersant after C21 + C22 / C28 + C29, C21 / C22 Significance; oiling agent exacerbated the weathering of certain PAHs and their alkylated series of biomarkers, making the ratio of biomarkers associated with them (C2-D / C2-P, C3-D / C3-P, ΣP / ΣD, 2-MP / 1-MP, 4-MD / 1-MD); most of the steroid and terpane biomarkers have strong resistance to weathering, and the correlation ratios still have good indications significance.