Effect of photochemical reactions on fates of petroleum hydrocarbons

The subproject includes chemical data of the fates of petroleum hydrocarbons after photochemical oxidation. Seawater was obtained from the Deepwater Horizon site and subjected to four types of treatment including seawater alone (S), seawater + crude oil (SO), seawater + crude oil + 13C-phenanthrene (SOP), and seawater + crude oil + 13C-phenanthrene + darkness (SOPD). Through analysis on a series of incubation samples under field conditions, four fractions of petroleum including saturate, aromatic, resin and asphaltene were quantified through weights, specific hydrocarbon compounds, and del-13C values. We also used 13C labeled phenanthrene and trace the 13C label in these four fractions.

本子课题包含石油烃类经光化学氧化后的环境归宿相关化学数据。实验所用海水采自深水地平线（Deepwater Horizon）事故现场，并设置四类处理方式：仅海水组（S）、海水+原油组（SO）、海水+原油+¹³C-菲（13C-phenanthrene）组（SOP），以及海水+原油+¹³C-菲+避光组（SOPD）。通过对现场条件下的一系列培养样本开展分析，采用重量法、特征烃类化合物检测以及碳稳定同位素δ¹³C值测定，对石油烃的四大组分——饱和烃、芳香烃、树脂与沥青质进行定量。本研究同时采用¹³C标记的菲，对上述四大组分中的¹³C标记信号进行追踪分析。