Assessment of petroleum biodegradation using stable hydrogen isotopes of individual saturated hydrocarbon and polycyclic aromatic hydrocarbon distributions in oils from the Upper Indus Basin, Pakistan

Asif, Muhammad; Grice, Kliti; Fazeelat, Tahira

doi:10.1016/j.orggeochem.2008.12.007

Cited by 62 publications

(32 citation statements)

References 39 publications

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“…n-Alkanes in oils from the Tarim Basin are progressively enriched in D with increasing carbon numbers (Fig. 5), which was commonly reported in previous work (Li et al, 2001;Schimmelmann et al, 2004;Dawson et al, 2005Dawson et al, , 2007Lu et al, 2005;Asif et al, 2009;Aboglila et al, 2010). Such a trend was not observed in the immature sediments, however, n-alkanes in the sediments coming into the oil window were characterized by D enrichment with increasing carbon numbers (Pedentchouk et al, 2006;Kikuchi et al, 2010).…”

Section: Hydrogen Isotopic Compositions Of the Crude Oilssupporting

confidence: 80%

“…dD values of total oils and their fractions were used in characterizing the oil source and mixing (Yeh and Epstein, 1981;Peters et al, 1986;Santos Neto and Hayes, 1999;Fekete et al, 2009). During the past decade, compound specific hydrogen isotopic analysis, which is the same as the carbon isotopic approach, achieved its great potential for use in various fields of petroleum geochemistry, including tracing oil source (Li et al, 2001;Schimmelmann et al, 2004;Dawson et al, 2007;Aboglila et al, 2010), elucidating the depositional environment of source rocks (Li et al, 2001;Schimmelmann et al, 2004;Dawson et al, 2005), determining maturity (Radke et al, 2005;Dawson et al, 2007), and evaluating the impact of biodegradation on oils Asif et al, 2009). It has been well known that hydrogen isotopic compositions have unique values for the characterization of the oil source and related geological processes due to its large variations compared to carbon isotopic compositions.…”

Section: Introductionmentioning

confidence: 99%

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Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Jia

Wang

Peng

et al. 2013

Organic Geochemistry

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Section: Hydrogen Isotopic Compositions Of the Crude Oilssupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Jia

Wang

Peng

et al. 2013

Organic Geochemistry

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“…The ratios of n-C 17 /Pr (n-heptadecane/pristane) and n-C 18 /Ph (n-octadecane/ phytane) have been known as reliable indicators of biodegradation, with the decreasing values indicating enhanced biodegradation (Asif et al, 2009). For evaluating the degree of biodegradation, the ratios of n-C 17 /Pr, n-C 18 /Ph and Pr/Ph were determined.…”

Section: Resultsmentioning

confidence: 99%

Use of bacteria-immobilized cotton fibers to absorb and degrade crude oil

Meng

Liu

Chen

et al. 2014

International Biodeterioration & Biodegradation

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a b s t r a c tUsing enrichment culture technique, two isolates that brought a significant degradation and dispersion of crude oil were obtained from contaminated sediments of the Bohai Bay, China. 16S rRNA gene sequencing and phylogenetic analysis indicated that the two bacterial strains affiliated with the genera Vibrio and Acinetobacter. Subsequently, the bacterial cells were immobilized on the surface of cotton fibers. Cotton fibers were used as crude oil sorbent as well as a biocarrier for bacteria immobilization. Among the two isolates, the marine bacteria Acinetobacter sp. HC8-3S showed a strong binding to the cotton fibers, possibly enhanced through extracellular dispersant excreted by Acinetobacter sp. HC8-3S. Both planktonic and immobilized bacteria showed relatively high biodegradation (>60%) of saturated hydrocarbons fraction of crude oil, in the pH range of 5.6e8.6. The degradation activities of planktonic and immobilized bacteria were not affected significantly when the NaCl concentration reached 70 g/L. The immobilized bacterial cells exhibited an enhanced biodegradation of crude oil. The efficiency of saturated hydrocarbons degradation by the immobilized bacterial cells increased about 30% compared to the planktonic bacterial cells.

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“…The ratios of n-heptadecane/ pristane (n-C 17 /Pr) and n-octadecane/phytane (n-C 18 /Ph) are reliable indicators of biodegradation effects (Asif et al, 2009). Degradation of saturated hydrocarbons was analyzed by GC.…”

Section: Biodegradation Of Crude Oil By Fermentation Brothmentioning

confidence: 99%

Industrial-scale culturing of the crude oil-degrading marine Acinetobacter sp. strain HC8-3S

Liu

Liu³

2016

International Biodeterioration & Biodegradation

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a b s t r a c tThe marine bacterium Acinetobacter sp. strain HC8-3S, capable of degrading petroleum hydrocarbons, was previously shown to be applicable for bioremediation. Here, we evaluated the performance of the strain during industrial-scale fermentation, long-term storage, and biodegradation processes. Fermentation parameters were optimized for industrial-scale culturing using lower salinity and fewer inorganic salts in the culture medium. The shelf-life of the fermentation broth was evaluated in different storage conditions. Biodegradation efficiency of the strain was evaluated using gas chromatography. Results indicated that the optimum conditions for one-ton scale fermentation were 30 C, pH 7.4e7.8, and rotation speed 90 rpm; the cell density reached 3.6 ± 1.9 Â 10 10 CFU ml À1 after 12 h. The low temperature can preserved fermentation broth for longer time. When the storage temperature was down to 4 C from room temperature, half-life of strain HC8-3S extended from 9 days to 34 days. The biodegradation rate of the saturated hydrocarbon fraction of crude oil was 94% after treatment with the strain for 5 days. The results indicate that Acinetobacter sp. strain HC8-3S can be enriched efficiently on a large scale, making it a potentially useful industrial strain. This crude oil degradative capability of the strain HC8-3S provides possible application for the clean-up of crude oil-contaminated environment.

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Assessment of petroleum biodegradation using stable hydrogen isotopes of individual saturated hydrocarbon and polycyclic aromatic hydrocarbon distributions in oils from the Upper Indus Basin, Pakistan

Cited by 62 publications

References 39 publications

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Use of bacteria-immobilized cotton fibers to absorb and degrade crude oil

Industrial-scale culturing of the crude oil-degrading marine Acinetobacter sp. strain HC8-3S

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