胶州湾表层沉积物中烃类有机物特征参数研究

本文以胶州湾南部海域表层沉积物为研究对象，利用气质联用技术（GC-MS）研究了其正构烷烃、多环芳烃、甾烷和萜烷的参数特征，以及来源的解析指示。结果表明:胶州湾南部海域表层沉积物正构烷烃碳数范围为C₉~C₃₄，均呈双峰分布，主峰碳分别为C₁₇、C₂₇，且后峰丰度远高于前峰。沉积物中PAHs可能主要来源于石油及其衍生品的输入，近年来，其来源可能由化石燃料等燃烧为主转为石油产品输入影响为主。胶州湾南部海域Ts/Tm指示了石油输入的特征。C₃₁αβ（S/（S+R））、C₃₂αβ（S/（S+R））、C₃₃αβ（S/（S+R））等藿烷比值范围分别为0.61~0.63、0.42~0.58、0.64~0.71，C₂₉甾ααα（S/（S+R））比值为0.46~0.58，显示了较高成熟度的特征。

Characteristic parameters of organic hydrocarbons in the surface sediments of Jiaozhou bay

The surface sediments in the south of Jiaozhou bay are studied in this paper, by using the technique of Gas Chromatography-Mass Spectrometry (GC-MS), the parameter characteristics of the normal alkanes, polycyclic aromatic hydrocarbons, steranes and terpenes are studied.Results show:the carbon number of alkanes in the surface sediments of the South Sea area of Jiaozhou bay is from C₉ to C₃₄, all two peaks are distributed.The main peak carbons are C₁₇ and C₂₇, and the peak abundance is much higher than that of the previous peak.The PAHs in sediments may be mainly derived from the input of petroleum and its derivatives.In recent years, the source may be dominated by the burning of fossil fuels, and the oil products become to the main input.The Ts/Tm in the south of the Gulf of Jiaozhou indicates the characteristics of the oil input.C₃₁αβ(S/(S+R)), C₃₂αβ(S/(S+R)), C₃₃αβ(S/(S+R)), C₂₉ααα(S/(S+R)) are from 0.61 to 0.63, 0.42 to 0.58, 0.64 to 0.71, 0.46 to 0.58 respectively, which shows the characteristics of high maturity.