Navigation Links
A hope for oil spill bioremediation

A recently published article in Environmental Microbiology reveals that indigenous microbiota of the Galician shore is readily able to degrade crude oil. Scientists from the Estación Experimental del Zaidín (Spanish Council for Research, CSIC) in Granada investigated in situ crude oil degradation after the Prestige oil spill in November 2002.

After a spill, hydrocarbons are subjected to physicochemical processes such as evaporation or photochemical oxidation which produce changes in oil composition. But the most important process acting on the spilled oil is biodegradation. It is well established that most crude oils are biodegradable to a great extent, especially components as short linear alkanes or simple aromatic hydrocarbons. However, the heavy fraction, made of long-chain saturated and polyaromatic hydrocarbons and a considerable fraction of asphaltenes and resins, is generally recalcitrant to degradation.

The team's goal was to assess the response of the natural bacterial population after the spill and to detect evidences of crude oil degradation taking place at the contaminated sites. They used stable isotopes (13C/12C) to determine the origin of dissolved inorganic carbon (DIC) in control and contaminated coastal marine water samples. Due to its biological origin, crude oil is very depleted in 13C. Therefore, its biodegradation product CO2 will also be more 13C depleted as compared with the typical marine DIC and atmospheric dissolved CO2.

The sampling area is an energetic system poor in organic mater. Consequently, the anomalous DIC isotopic composition of certain samples taken along the shore of a contaminated island in the Cíes archipelago showed degradation of a depleted 13C source such as the Prestige crude oil, pointing out to a natural population oxidizing this carbon source into CO2. This could be reproduced in the laboratory using water samples taken from the contaminated shore, although the process required nitrogen and phos phorus amendment, these two elements being limited in marine ecosystems. The results confirmed the presence of a microbiota readily able to degrade the contaminant.

Further analysis of specific organisms present in contaminated beaches revealed the presence of several populations able to degrade polycyclic aromatic compounds such as phenanthrene or naphthalene, especially in those sites that had recently been restored after an important contamination episode. Authors concluded that, probably due to the contamination record of the past in that coast, indigenous populations had evolved to select for organisms able to grow and degrade components of crude oil.


'"/>

Source:Blackwell Publishing Ltd.


Related biology news :

1. Oil spills and climate change double the mortality rate of British seabirds
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/21/2017)... Ore. , Feb. 22, 2017  IBM (NYSE: ... (Avamere Health Services, Infinity Rehab, Signature Hospice, Home Health, ... will apply the power of IBM cognitive computing to ... centers. By analyzing data streaming from sensors in senior ... and environmental conditions, and obtain deeper learnings into the ...
(Date:2/13/2017)... FRANCISCO , Feb. 13, 2017  RSA ... centralized platform that is designed to enhance fraud ... latest release in the RSA Fraud & Risk ... enable organizations to leverage additional insights from internal ... tools to better protect their customers from targeted ...
(Date:2/8/2017)... YORK , Feb. 8, 2017 About ... individual,s voice to match it against a stored ... such as pitch, cadence, and tone are compared ... require minimal hardware installation, as most PCs already ... for different transactions. Voice recognition biometrics are most ...
Breaking Biology News(10 mins):
(Date:2/24/2017)... China Biologic Products, Inc. (NASDAQ: CBPO) ("China Biologic" or the ... today announced its financial results for the fourth quarter and ... Financial Highlights Total sales in the ... or increased by 13.6% in USD terms to $77.6 million ... Gross profit increased by 13.3% to $46.8 million ...
(Date:2/23/2017)... ... February 23, 2017 , ... BellBrook ... portfolio to include an array of biochemical analyses critical for Lead Discovery. ... their hit-to-lead and SAR programs, including inhibitor potency and selectivity, mechanism of action, ...
(Date:2/23/2017)... , Feb. 23, 2017  Imanis Life Sciences ... line of oncolytic vaccinia viruses for virotherapy research. ... part of Genelux,s proprietary, vaccinia virus-based technology platform ... to enter into a partnership with Genelux to ... vaccinia viruses for use in research," said Dr. ...
(Date:2/23/2017)... ... 2017 , ... The Greater Gift Initiative, Inc , (GGI) a Winston-Salem, ... . GGI's mission is to advance global health and highlight the greater good of ... of each clinical trial volunteer. The vision of GGI is to serve as a ...
Breaking Biology Technology: