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Enhancing the biodegradation of oil in sandy sediments with choline.

Authors: Behzad Mortazavi

Published On: Jul 27 2014 20:45 UTC

DOI: https://doi.org/10.7266/N7057CW0

UDI: Y1.x249.000:0003

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Project Information

Funded By:
Gulf of Mexico Research Initiative

Funding Cycle:
The Alabama Marine Environmental Science Consortium (MESC)

Research Group:
Determining the Degradation Rate Constants of the Hydrocarbons from the Macondo Well and Weathered Oil in Alabama Beaches and Marshes

Point of Contact

Behzad Mortazavi
The University of Alabama / Department of Biological Sciences
bmortazavi@ua.edu

Theme keywords

Biodegradation, Crude Oil, Choline, Laurolycholine chloride, tricholine citrate

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Abstract:

We investigated how additions of choline, a naturally occurring methylated nitrogen-containing com-pound, accelerated hydrocarbon degradation in sandy sediments contaminated with moderately weathered crude oil (4000 mg kg?1 sediment). Addition of lauroylcholine chloride (LCC) and tricholine citrate (TCC) to oil contaminated sediments resulted in 1.6 times higher hydrocarbon degradation rates compared to treatments without added choline derivatives. However, the degradation rate constant for the oil contaminated sediments amended with LCC was similar to that in contaminated sediments amended with inorganic nitrogen, phosphorus, and glucose. Additions of LLC and TCC to sediments containing extensively weathered oil also resulted in enhanced mineralization rates.

Suggested Citation:

Behzad Mortazavi. 2014. Enhancing the biodegradation of oil in sandy sediments with choline.. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7057CW0

Publications:

Mortazavi, B., Horel, A., Anders, J. S., Mirjafari, A., Beazley, M. J., & Sobecky, P. A. (2013). Enhancing the biodegradation of oil in sandy sediments with choline: A naturally methylated nitrogen compound. Environmental Pollution, 182, 53–62. doi:10.1016/j.envpol.2013.06.022

Purpose:

To demonstrate how minimal amounts of organic compounds to oil contaminated sediments enhances the degradation of hydrocarbons.

Data Parameters and Units:

LCC is Lauroylcholine chloride, TCC is Tricholine Citrate, and NPG is NH4NO3+PO4+Glucose. Daily CO2 respiration rates (mean ± SE) (mg C) Cumulative CO2 Respiration Rates (mg C) Total Petroleum Hydrocarbon concentrations (mg/kg of sediments) Diagnostic ratios are presented for C17/Pristane, C18/Phytane, and Pristane/Phytane.

Methods:

As reported in Mortazavi, B., Horel, A., Anders, J. S., Mirjafari, A., Beazley, M. J., & Sobecky, P. A. (2013). Enhancing the biodegradation of oil in sandy sediments with choline: A naturally methylated nitrogen compound. Environmental Pollution, 182, 53-62.