Biodegradation of Natural Oils in Seawater

Al-Darbi, M. M.; Saeed, Noor; Islam, M.R.; Lee, K.

doi:10.1080/00908310490448073

Cited by 26 publications

(12 citation statements)

References 18 publications

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“…Many of these studies address the impact and management of hydrocarbon spills in Antarctica and other cold environments and provide valuable information on the indigenous and imported hydrocarbon‐degrading microorganisms. Other relevant studies examined the microbial content and environmental biodegradation of nonpetroleum hydrocarbons, including vegetable oils (Cornish et al ., ; Al‐Darbi et al., ; Dayrit et al ., ; Okechalu et al ., ; Tsiamis et al ., ). Our results, finding a substantial microbial content in the coconut oil‐based NEEM drilling fluid, corroborate other studies demonstrating the existence of large and diverse populations of microorganisms in hydrocarbon‐rich substances and contaminated environments.…”

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of the indigenous microbial diversity vs. drilling fluid contaminants in the NEEM Greenland ice core

Miteva

Burlingame

Sowers

et al. 2014

FEMS Microbiol Ecol

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Demonstrating that the detected microbial diversity in nonaseptically drilled deep ice cores is truly indigenous is challenging because of potential contamination with exogenous microbial cells. The NEEM Greenland ice core project provided a first-time opportunity to determine the origin and extent of contamination throughout drilling. We performed multiple parallel cultivation and culture-independent analyses of five decontaminated ice core samples from different depths (100-2051 m), the drilling fluid and its components Estisol and Coasol, and the drilling chips collected during drilling. We created a collection of diverse bacterial and fungal isolates (84 from the drilling fluid and its components, 45 from decontaminated ice, and 66 from drilling chips). Their categorization as contaminants or intrinsic glacial ice microorganisms was based on several criteria, including phylogenetic analyses, genomic fingerprinting, phenotypic characteristics, and presence in drilling fluid, chips, and/or ice. Firmicutes and fungi comprised the dominant group of contaminants among isolates and cloned rRNA genes. Conversely, most Proteobacteria and Actinobacteria originating from the ice were identified as intrinsic. This study provides a database of potential contaminants useful for future studies of NEEM cores and can contribute toward developing standardized protocols for contamination detection and ensuring the authenticity of the microbial diversity in deep glacial ice.

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Section: Discussionmentioning

confidence: 99%

Comparative evaluation of the indigenous microbial diversity vs. drilling fluid contaminants in the NEEM Greenland ice core

Miteva

Burlingame

Sowers

et al. 2014

FEMS Microbiol Ecol

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“…There is also evidence that the autoxidation as a part of the deterioration process can accelerate the biodegradation process by producing smaller and easier compounds to be biodegraded or inhibits it by producing antibacterial products (e.g. formic acid) (Al-Darbi et al 2005). Therefore it can be concluded that the oxidation products could have affected the biodegradation tests in this study.…”

Section: Biodegradability Testsmentioning

confidence: 75%

“…The organic acids can also be formed as a result of microbial activity (Schricher et al 2009). It has also been suggested that the viscosity, structure and compostion of the oils and fats have an effect on the biodegradation rates and also oxidation products can either accelerate or inhibit the biodegradation (Al-Darbi et al 2005). Lapinskiené and Martinkus (2007) studied the intermediate biodegradation products of biodiesel, sunflower oil, diesel and beef grease.…”

Section: Biodegradability Testsmentioning

confidence: 99%

“…Microbes have been reported to be able to consume small amounts of bio-oils and the amount of microbes has increased and larger contamination levels have decreased the amount of microbes in the soil (Flykt et al 2003). Al-Darbi et al (2005) showed that the different types of oils had different kind of effect to the amount of microbes in seawater and waste water contaminations.…”

Section: Phytotoxicity Testsmentioning

confidence: 99%

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The phytotoxic effects and biodegradability of stored rapeseed oil and rapeseed oil methyl ester

Vauhkonen¹,

Lauhanen²,

Ventelä³

et al. 2008

AFSci

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The aims of this study were to determine the phytotoxicity of stored rapeseed (Brassica rapa) oil (RSO) and rapeseed oil methyl ester (RME) after "spill like" contamination on the growth of barley (Hordeum vulgare) and the biodegradability of these substances in OECD 301F test conditions and in ground water. Rapeseed oil and rapeseed oil methyl ester were both stored for a period of time and their fuel characteristics (e.g. acid number) had changed from those set by the fuel standards and are considered to have an effect on its biodegradation. The phytotoxicity was tested using two different types of barley cultivars: 'Saana' and 'Vilde'. The phytotoxic effect on the barley varieties was determined, after the growth season, by measuring the total biomass growth and the mass of 1000 kernels taken from the tests plots. Also visual inspection was used to determine what the effects on the barley growth were. These measurements suggest that both RSO and RME have a negative impact on barley sprouts and therefore the total growth of the barley. RSO and RME both decreased the total amount of harvested phytomass. The weight of 1000 kernels increased with low concentrations of these contaminants and high contamination levels reduced the mass of the kernels. The results of these experiments suggest that the stored rapeseed oil and rapeseed oil methyl ester are both phytotoxic materials and therefore will cause substantial loss of vegetation in the case of a fuel spill. The RSO and RME biodegraded effectively in the measurement period of 28 days under OECD test conditions: the degree of biodegradation being over 60%. The biodegradation in the ground water was much slower: the degree of biodegradation being about 10% after 28 days.

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“…The intensity of oils biodegradation is influenced by several factors, such as nutrients, oxygen, pH, composition, concentration and bioavailability of the contaminants, chemical and physical characteristics and the pollution history of the contaminated environment [12]. Particularly, lack of essential nutrients such as nitrogen and phosphorus is one of the major factors affecting biodegradation of hydrocarbon by microorganisms in soil and water environment [13].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Hydrocarbons Biodegradation by Bacterial Strains Isolated from Wastewaters in Ouagadougou, Burkina Faso: Case Study of SAE 40/50 Used Oils and Diesel

Sawadogo¹,

Otoidobiga²,

Nitiema³

et al. 2016

JACEN

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How to cite this paper: Sawadogo, A., et al. (2016) AbstractEnvironmental pollution with petroleum and petrochemical products such as diesel and used oils has been recognized as one of the most serious current problem in the world, especially in developing countries. These petrochemical products devastate the soil, surface and underground waters and alter the microbial population at the polluted sites. Thus, the present work aims to optimize the biodegradation of diesel and two used oils (SAE 40 and SAE 50) by bacterial strains namely Acinetobacter S2 and Pseudomonas S7 using either nutrient factors (yeast extract, peptone or trace elements) or surfactants (tween 80 or Sodium Dodecyl Sulfate: SDS). The strains are incubated alone or together with the used oils or diesel supplemented or not with nutrient factors or surfactants for 14, 28, 42 and 56 days, respectively. For all the incubation period, the hydrocarbons degradation rates are determined by gravimetric assay. The results obtained show that nutrient factors increase significantly SAE 50 used oil biodegradation (p = 0.009). Similarly, tween * Corresponding author. A. Sawadogo et al.2 80 increases SAE 50 and SAE 40 used oils biodegradation but not diesel one. The results also show a significant difference between biodegradation rates at 14, 28, 42 and 56 days for all the hydrocarbons tested (p < 0.0001). For all the hydrocarbons, the association of strains Acinetobacter S2 and Pseudomonas S7 increases the degradation over the one of the strains alone.

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Biodegradation of Natural Oils in Seawater

Abstract: Spills of non-petroleum hydrocarbons including vegetable oils and fish oils are of environmental concern because of their potential to cause serious effects on marine life and coastal environments. Biodegradation by indigenous microorganisms is an

Cited by 26 publications

References 18 publications

Comparative evaluation of the indigenous microbial diversity vs. drilling fluid contaminants in the NEEM Greenland ice core

Comparative evaluation of the indigenous microbial diversity vs. drilling fluid contaminants in the NEEM Greenland ice core

The phytotoxic effects and biodegradability of stored rapeseed oil and rapeseed oil methyl ester

Optimization of Hydrocarbons Biodegradation by Bacterial Strains Isolated from Wastewaters in Ouagadougou, Burkina Faso: Case Study of SAE 40/50 Used Oils and Diesel

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