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.