Isolation and characterization of indigenous thermophilic bacteria active in natural attenuation of bio-hazardous petrochemical pollutants

Mohamed, Magdy El‐Said; Al-Dousary, M.; Hamzah, Riyad Y.; Fuchs, Georg

doi:10.1016/j.ibiod.2006.06.022

Cited by 38 publications

(22 citation statements)

References 28 publications

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“…United States National Research Council classified these organic contaminants into high and low molecular weight hydrocarbons, oxygenated, halogenated aliphatics, aromatics, nitro aromatics hydrocarbons and alkanes (NRC 2000;Abrajano and Yan 2014). These hydrocarbons and alkanes have been considered as priority pollutants (NRC 2000;Ekperusi and Aigbodion 2015), which are biohazards and biomagnified in the environment (Kramer and Van der Heijden 1990;Mohamed et al 2006). While, there are special group of microorganisms that can biodegrade and biotransform these hydrocarbons and alkanes to assimilate as biomass in the ecosystem (Chikere et al 2012;Rajasekar et al 2012;Roy et al 2015;Kumar et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Enzyme-mediated biodegradation of long-chain n-alkanes (C32 and C40) by thermophilic bacteria

et al. 2017

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Removal of long-chain hydrocarbons and nalkanes from oil-contaminated environments are mere important to reduce the ecological damages, while bioaugmentation is a very promising technology that requires highly efficient microbes. In present study, the efficiency of pure isolates, i.e., Geobacillus thermoparaffinivorans IR2, Geobacillus stearothermophillus IR4 and Bacillus licheniformis MN6 and mixed consortium on degradation of long-chain n-alkanes C 32 and C 40 was investigated by batch cultivation test. Biodegradation efficiencies were found high for C 32 by mixed consortium (90%) than pure strains, while the pure strains were better in degradation of C 40 than mixed consortium (87%). In contrast, the maximum alkane hydroxylase activities (161 lmol mg -1 protein) were recorded in mixed consortium system that had supplied with C 40 as sole carbon source. Also, the alcohol dehydrogenase (71 lmol mg -1 protein) and lipase activity (57 lmol mg -1 protein) were found high. Along with the enzyme activities, the hydrophobicity natures of the bacterial strains were found to determine the degradation efficiency of the hydrocarbons. Thus, the study suggested that the hydrophobicity of the bacteria is a critical parameter to understand the biodegradation of n-alkanes.

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Section: Introductionmentioning

confidence: 99%

Enzyme-mediated biodegradation of long-chain n-alkanes (C32 and C40) by thermophilic bacteria

et al. 2017

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“…Moreover, petrochemical discharges have been proved to induce notable ecotoxicological effects [2]. In particular, some petrochemical compounds, such as polyaromatic hydrocarbons (PAHs) and heterocyclic NOS-containing compounds (NOS-compounds) have certain physico-chemical properties that combine to make contaminated sites sinks for these compounds [3][4][5] Many of these compounds have been considered as priority pollutants which exert biohazardous effects on both human and other living organisms in the environment [6].…”

Section: Introductionmentioning

confidence: 99%

Study of different pretreatments for reverse osmosis reclamation of a petrochemical secondary effluent

Benito-Alcázar

Vincent‐Vela

Gozálvez-Zafrilla

et al. 2010

Journal of Hazardous Materials

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“…However, the different hydrocarbons (especially crude oil, kerosene and phenanthrene) degrading activity by Geobacillus sp. had not been reported until 2006 [34].…”

Section: Emulsification Activitymentioning

confidence: 99%

Analysis of Biosurfactant Production by a New Thermophilic and Halotolerant Bacterium, Geobacillus sp. QT

Xia¹

2018

Int. J. Green Technol.

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Geobacillus sp. QT was isolated from the brines of oil reservoir in Daqing oilfield, China, and could produce biosurfactants with different hydrophobic or hydrophilic hydrocarbons. As a result of biosurfactant production, the surface tension of the culture was reduced from 71.59 mN/m to 25.9 mN/m. Two types of biosurfactants of this strain by using different carbon source were obtained. GPC analysis showed that the number-average molecular weights of the biosurfactants were 466-652 Da for type I and 269,485-406,158 Da for type II, with PDI values of 1.079-1.161 and 1.155-1.22, respectively. Chemical composition studies exhibited that two types of biosurfactant consisted of carbohydrates, lipids and proteins with different composition ratio. Emulsification assays approved the effectiveness of biosurfactants over a wide range of temperature, pH, salinity and with different metal ions. Sand packs tests indicated the potential value of the biosurfactants of this strain in enhanced oil recovery.

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Isolation and characterization of indigenous thermophilic bacteria active in natural attenuation of bio-hazardous petrochemical pollutants

Cited by 38 publications

References 28 publications

Enzyme-mediated biodegradation of long-chain n-alkanes (C32 and C40) by thermophilic bacteria

Enzyme-mediated biodegradation of long-chain n-alkanes (C32 and C40) by thermophilic bacteria

Study of different pretreatments for reverse osmosis reclamation of a petrochemical secondary effluent

Analysis of Biosurfactant Production by a New Thermophilic and Halotolerant Bacterium, Geobacillus sp. QT

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