Rates of depletion of lubricant and fuel contaminants from Antarctic regions during natural attenuation and remediation procedures - GC_MS lubrication oil dataEntry ID: ASAC_2915_GCMS_Oil
Abstract: These data relate to the Max Easton Honours project, carried out at Macquarie University in 2010, supervised by Simon George THE LONG-TERM DEGRADATION OF LUBRICANT OIL IN ANTARCTIC MARINE SEDIMENTS.
A simulated marine spill has been carried out by the Australian Antarctic Division (AAD) over a five year period, in which Antarctic sea-bed sediments were doped with various petroleum products and ... left in a shallow marine environment to examine the extent and rate of natural degradation. Of these pollutants, unused Mobil lubricant oil (OW/40; Exxon Mobil) was analysed qualitatively and semi-quantitatively by gas chromatography-mass spectroscopy (GC-MS) to determine the composition of the oil and the rates and modes of degradation.
The Mobil Lubricant Oil was found to consist of three dominant compound classes;
1) a series of branched alkanes with chain lengths of C25-26 and C33-34,
2) a series of long chain alkylnaphthalenes (formula C26H40), and
3) a series of bulky alkanoate esters.
Other minor compounds were also identified. The alkanoate esters were depleted most readily, to less than 20% their initial values after 65 weeks. Branched alkanes and long chain alkylnaphthalenes were both recalcitrant over time, present at ~10% of their initial value after 260 weeks. Both the branched alkanes and long chain alkylnaphthalenes exhibited near identical behaviour through the sediment profile over time, depleting at the surface and increasing at depths consistent with migration through the sediment profile. Branched alkanes were depleted most rapidly relative to all other compounds, perhaps owing to preferred the biodegradation of long alkyl chains.
No clear interpretation of the dominant mode of degradation was able to be defined, although it is believed that a multitude of removal mechanisms participate in the removal of lubricant oils in Antarctic marine sediments.
1) Retention time - Minutes
2) Region - It is a retention time window, labelled A to G as colours
3) Peak area - Peak area is in arbitrary units.
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Data Set Citation
Dataset Release Date: 2013-03-21
Dataset DOI: http://dx.doi.org/10.4225/15/514A9E2C57E6A
Start Date: 2007-09-30Stop Date: 2010-03-31
Access Constraints These data are publicly available from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_291... when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 596 kb
Distribution Format: Excel
Role: TECHNICAL CONTACT
Phone: +61 2 9850 4424
Fax: +61 2 9850 8248
Email: sgeorge at els.mq.edu.au
Australian Centre for Astrobiology Building E8C 153 Macquarie University
Province or State: New South Wales
Postal Code: 2109
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
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Creation and Review Dates
DIF Creation Date: 2013-01-16
Last DIF Revision Date: 2013-03-25