2021
DOI: 10.3389/fenvs.2021.779644
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Current Knowledge and Future Challenges on Bacterial Degradation of the Highly Complex Petroleum Products Asphaltenes and Resins

Abstract: Petroleum products consist mainly of aliphatics, aromatics, asphaltenes and resins. After oil exploitation, the concentrations of asphaltenes and resins are high in oil reservoirs; however, they are also the petroleum pollutants most recalcitrant to degradation, leading to high oil viscosity. A sizable amount of work has been dedicated to understand the degradation mechanisms of aliphatics and aromatics; however, in comparison, little work has been carried out on asphaltene and resin degradation. This review d… Show more

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Cited by 10 publications
(5 citation statements)
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“…The difference is that the molecular weight of asphaltenes is higher than that of resins, and the composition is more complex. 43 So far, there is no precise definition for the chemical structure of resin and asphaltene components. Although there have been many studies discussing their structure, 44 , 45 no consensus has been reached.…”
Section: Resultsmentioning
confidence: 99%
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“…The difference is that the molecular weight of asphaltenes is higher than that of resins, and the composition is more complex. 43 So far, there is no precise definition for the chemical structure of resin and asphaltene components. Although there have been many studies discussing their structure, 44 , 45 no consensus has been reached.…”
Section: Resultsmentioning
confidence: 99%
“…Under aerobic conditions, the four fractions of oil sands were gradually degraded under the action of oxygenase, and intermediate products such as aldehydes, ketones, and carboxylic acids were generated in the process. 43 The polarity of these intermediates is close to that of the resin, causing the intermediates and resins to elute together in the silica gel/alumina column. Therefore, the total peak area of the resins (degradation group) increased abnormally.…”
Section: Resultsmentioning
confidence: 99%
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“…The light oil led to high amounts of C�O and O−H in MODA-L7, MODA-L40, and MODA-L90. 48,49 This could explain the various behaviors of MODAs formed by light oil and heavy oil. The light oil-formed MODAs contained a large amount of the hydrophilic functional group (i.e., O−H), which bonded with the hydrogen of the water molecule to keep them stable in the seawater column.…”
Section: Moda Transport Under Various Oil Types and Mp Sizesmentioning
confidence: 99%