Abstract:

The dataset describe chemical analyses of the gases methane, ethane and propane, and analyses of volatile organic compounds in laboratory experiments with water-accommodated fractions (WAFs) or seawater with or without injection of a mixture of the gases methane, ethane and propane. The laboratory experiments were performed with natural non-amended seawater from a Norwegian fjord, and generation of the WAFs by low-energy (LE-WAF) in the seawater. LE-WAFs were generated With both high dosage of oil to seawater (1:100)(HC-LE-WAFs) and low dosage of oil to the seawater (1:10,000)(LC-LE-WAF). Biodegradation experiments with HC-LE-WAFs were performed at 5°C for 30 days, and with LC-LE-WAFs at 5°C for 64 days. Gas mixtures (methane, ethane and propane) were injected in seawater without LE-WAF, or in LE-WAFs for comparison. Experiments were also performed with LE-WAFs with or without injection of gas mixtures.

Suggested Citation:

Odd Gunnar Brakstad. 2017. Biodegradation of gas and volatile hydrocarbons in seawater. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7G15XX8

Publications:

Brakstad, O. G., Almås, I. K., & Krause, D. F. (2017). Biotransformation of natural gas and oil compounds associated with marine oil discharges. Chemosphere, 182, 555–558. doi:10.1016/j.chemosphere.2017.05.046

Purpose:

1) Determine biotransformation rates of dissolved gas compounds (methane, ethane and propane) in natural seawater 2) Investigate if gas compound degradation affected degradation of soluble oil compounds in the seawater

Data Parameters and Units:

NG - seawater with natural gas mixture (methane, ethane and propane) SW - natural unamended seawater WSF - water-soluble fraction of the oil used in seawater WSF+NG - a mixture of the water-soluble fraction and the natural gas mixture in seawater Sterile WSF+NG - a mixture of water-soluble fraction and the natural gas mixture in sterilized seawater (filtered and treated with the biocide mercury chloride). Data parameters: GC-FID analyses of dissolved gases and GC-MS analyses of volatile organic compounds Units: gas analyses - ppmV; VOC analyses - µg/L

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