Source Characterization of Polycyclic Aromatic Hydrocarbons by Using Their Molecular Indices: An Overview of Possibilities - Reviews of Environmental Contamination and Toxicology - page 113

Fig. 24 The PI for different sources. PER was omitted for data estimations from Burns et al.
( 1997 ). Degradation arrow is assumed as inferred from EVC crude weathering data from Burns
et al. ( 1997 ). See Fig. 9 for the symbols and the text for explanation

6 Discussion and Conclusions

The various PAH distributions, which differ from refinery feedstocks, refinery frac-
tionation/processes, differential degradation/weathering, formation or combustion
temperatures, provide a basis for differentiating and identifying the sources of PAHs
in sediments. Below, we reproduce and answer the questions posed in the introduc-
tion section.