This study is a continuation of analyses of the fluorometric index (FI), based on the fluorescence of substances of oil origin, as an indicator of oil in a seawater column. The effectiveness of the FI in the cold season (late autumn, winter and early spring) for the coastal water in the southern Baltic Sea was assessed. FI was tested for seawater polluted with a mixture of crude oils, lubricating oils and fuels. Laboratory analyses of oil-water systems for low (reaching the limit of detection) oil content in seawater were performed. The influences of the natural components of seawater that disrupt oil detection are discussed. The ability to detect oil in a seawater column regardless of the season was confirmed.
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http://dx.doi.org/10.3390/s22166014 | DOI Listing |
Int J Syst Evol Microbiol
January 2025
Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato, Tokyo 108-8477, Japan.
A crude oil aggregation-forming, strictly anaerobic, Gram-stain-positive, spore-forming, rod-shaped, motile and mesophilic bacterium, named strain SH18-2, was isolated from marine sediment near Sado Island in the Sea of Japan. The temperature, salinity and pH ranges of this strain for the growth were 15-40 °C (optimum 35 °C), 0.5-6.
View Article and Find Full Text PDFSensors (Basel)
December 2024
Department of Operational Oceanography, Maritime Institute, Gdynia Maritime University, ul. Roberta de Plelo 20, 80-848 Gdańsk, Poland.
The aim of this study is to verify the possibility of detecting oil in the bottom sediment using a fibre optic system. The presence of oil is assessed on excitation-emission spectra obtained from spectral fluorescence signals of the sediment sample. A factory spectrofluorometer coupled with an experimental fibre optic measurement system was used.
View Article and Find Full Text PDFMar Environ Res
December 2024
University of Manitoba, Winnipeg, MB, Canada.
Petroleum-derived contamination is a growing hazard for the Arctic Ocean and northern marine transportation corridors. In northern settings where the accessibility to oil spills can be limited, natural attenuation is the most promising remediation process. The goal of the presented research is to evaluate the impact of biodegradation on crude oil inside sea ice.
View Article and Find Full Text PDFSci Total Environ
January 2025
Department of Marine Science, University of Gothenburg, 45178 Fiskebäckskil, Sweden.
Aiming to reduce sulfur oxides emission in the atmosphere, the International Maritime Organization developed regulations on shipping that came into effect in 2020. The new rules incentivized many owners to install scrubber systems on thousands of ships. However, the overall environmental implications of scrubbers is a controversial subject, largely due to the release of acids, metals, and chemicals in the oceans and impact on marine life.
View Article and Find Full Text PDFSci Rep
December 2024
Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran.
Because a significant portion of oil remains in carbonate reservoirs, efficient techniques are essential to increase oil recovery from carbonate reservoirs. Wettability alteration is crucial for enhanced oil recovery (EOR) from oil-wet reservoirs. This study investigates the impact of different substances on the wettability of dolomite and calcite rocks.
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