Marine organic geochemistry of the Eastern Mediterranean: 1. Aliphatic and polyaromatic hydrocarbons in Cretan Sea surficial sediments

Sedimentary record of PAHs in the Barigui River and its relation to the socioeconomic development of Curitiba, Brazil

“…In addition, they are usually minor components in refined petroleum products (Gogou et al, 2000), although they are present in significant amounts in higher boiling point fractions including asphalt and, possibly bitumen or coal (Readman et al, 1987). A BaA/CHR ratio higher than 0.35 suggests typical combustion sources, whereas a BaA/CHR ratio between 0.20 and 0.35 indicates a mixture of combustion and petroleum sources; values lower than 0.20 indicate petroleum sources (Yunker et al, 2002).…”

“…At relatively low temperatures (catagenesis), the distribution of PAHs is governed by thermodynamic properties, while at elevated temperatures (pyrolysis) the distribution of these compounds is dominated by kinetic characteristics (Yunker et al, 2002(Yunker et al, , 1999Yunker and Macndonald, 1995). For example, high concentrations of PAHs with more than four aromatic rings are indicative of the formation of the compounds during the pyrolysis of fossil fuels (Gogou et al, 2000) while forest, grass and prairie fires have distinct isomeric PAH distributions (Yunker et al, 2002). PAHs can be degraded in the environment and under aerobic conditions of sedimentation, microbial degradation of PAHs has to be considered.…”

Application of multiple geochemical markers to investigate organic pollution in a dynamic coastal zone

“…Chem. 32,2013p-terphenyl-d 14 and dibenzo[a,h]anthracene-d 14 for PAHs) were added before instrumental analysis.…”

Polycyclic aromatic hydrocarbons (PAHs) in continental shelf sediment of China: Implications for anthropogenic influences on coastal marine environment

“…Mainly due to sedimentation, contributions from lateral transport may decrease with increasing distance (Chen et al, 2006). On the other hand, atmospheric deposition after long-range transport may become significant at distant areas (Gogou et al, 2000).…”