Petroleum hydrocarbon release behavior study in oil-sediment aggregates: turbulence intensity and chemical dispersion effect

This study investigated the effects of turbulence and oil dispersants on release of petroleum hydrocarbons in oil-sediment aggregates. A kinetic study showed that the static oil release process could be fitted to the first-order kinetics model. The oil concentration increased with increasing tempera...

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Bibliographic Details
Published in:RSC advances 2019-03, Vol.9 (14), p.7922-7931
Main Authors: Yan, Dong, Meng, Long, Li, Haoshuai, Song, Tianwen, Sun, Peiyan, Bao, Mutai, Li, Ximing
Format: Article
Language:English
Subjects:
Aggregates
Alkanes
Chemistry
Dispersants
Dispersion
Hydrocarbons
Marine environment
Oil spills
Organic chemistry
Sediments
Turbulence intensity
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Summary:This study investigated the effects of turbulence and oil dispersants on release of petroleum hydrocarbons in oil-sediment aggregates. A kinetic study showed that the static oil release process could be fitted to the first-order kinetics model. The oil concentration increased with increasing temperature and salinity, while remaining independent of pH. The dispersant desorption ability of petroleum hydrocarbons followed the sequence of: Tween 80 > Tween 85 > Span 80 > DOSS. In the presence of turbulence, the maximum release ratio was 40.28%. However, the combination of dispersants and turbulence had a smaller effect than turbulence alone. Furthermore, residual n -alkanes and PAHs in the sediments were analyzed. The results showed higher proportions of C 15 -C 35 and 2-3 ring PAHs in residual oil. These results can help assess the fate and distribution of oil spills in marine environments. This study investigated the effects of turbulence and oil dispersants on release of petroleum hydrocarbons in oil-sediment aggregates.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra08871c