Crude oil biodegradation potential of biosurfactant-producing Pseudomonas aeruginosa and Meyerozyma sp.
Abstract
This study investigates the potential of crude oil degrading capabilities of biosurfactant-producing strains of Pseudomonas aeruginosa MF069166 and Meyerozyma sp. MF138126. P. aeruginosa produced mono-/di-rhamnolipids congeners whereas, Meyerozyma sp. produced acidic and lactonic forms of sophorolipids with crude oil. The values of critical micelle concentrations of rhamnolipids and sophorolipids were 40 mg/L and 50 mg/L with reductions in surface tension of water to 29 mN/m and 33 mN/m. Dynamic light scattering revealed that the average diameter of micellar aggregates of rhamnolipids ranged between 300 and 350 nm and the average size of sophorolipids micelles was 309 nm and 380 nm. Biosurfactants from P. aeruginosa and Meyerozyma sp. exhibited emulsification activities of 87% and 84% in crude oil. Cell surface hydrophobicity of both strains was higher in the presence of hydrophobic contaminants. The biosurfactants showed stability under varying pH, NaCl concentrations and temperatures. Gravimetric and GC-MS analyses demonstrated that P. aeruginosa degraded 91% of the petroleum hydrocarbons while Meyerozyma sp. showed 87% biodegradation efficiency. P. aeruginosa and Meyerozyma sp. have also been found to degrade halogen-containing compounds and showed excellent crude oil degradation efficiency. It is concluded that both strains have high potential of applications in the bioremediation of hydrocarbons-contaminated sites.
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P. aeruginosa biosurfactants, such as rhamnolipids and lipopeptides, contribute to petroleum hydrocarbon removal when grown on petroleum hydrocarbons as the sole carbon source.
“Bioavailability is crucial for removal efficacy, and P. aeruginosa biosurfactants, such as rhamnolipids and lipopeptides, contribute to petroleum hydrocarbon removal when grown on petroleum hydrocarbons as the sole carbon source [237,301].”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [301]
Short-chain compounds are easier to eliminate than long-chain hydrocarbons, and aliphatic hydrocarbons remove more quickly than aromatic ones.
“Removal studies indicate that short-chain compounds are easier to eliminate than long-chain hydrocarbons and that aliphatic hydrocarbons remove more quickly than aromatic ones [301].”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [301]
Loss of microbial taxa can impair ecosystem functions despite microbial diversity not declining.
“Despite microbial diversity not declining, recent studies suggest that the loss of microbial taxa can impair ecosystem functions [298,301,390].”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [301]
Cites
Sen, S., Borah, S. N., Bora, A., & Deka, S. (2017) · Microbial Cell Factories · doi:10.1186/s12934-017-0711-z · Cited by 205 · see citing works
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Qattan, S. Y. A. (2025) · Environmental Sciences Europe · doi:10.1186/s12302-025-01103-y · Cited by 109 · see citing works
- Authors
- Rehman, R., Ali, M. I., Ali, N., Badshah, M., Iqbal, M., Jamal, A., & Huang, Z.
- Affiliations
- Quaid-i-Azam University (PK)
- University of Wyoming (US)
- Corresponding author
- Jamal, Asif
- Huang, Zaixing
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2021-09
- Volume
- 418
- Pages
- 126276
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W3169318012
- Cited by
- 87
- References
- 1
- Citations by year
- 2026: 15 · 2025: 21 · 2024: 17 · 2023: 18 · 2022: 16
- FWCI
- 3.12
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Quaid-i-Azam University
- Topics
- Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
- Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
- Physical Sciences › Chemistry › Organic Chemistry › Surfactants and Colloidal Systems
- Keywords
- crude oil biodegradation, biosurfactants, Pseudomonas aeruginosa, Meyerozyma, rhamnolipids, sophorolipids, critical micelle concentration, micellar aggregates, emulsification activity, cell surface hydrophobicity, petroleum hydrocarbon degradation, halogenated compounds, bioremediation, hydrocarbon-contaminated sites
- MeSH terms
- Biodegradation, Environmental, Saccharomycetales, Petroleum, Pseudomonas aeruginosa, Surface-Active Agents
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