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Development of a bacterial consortium comprising oil-degraders and diazotrophic bacteria for elimination of exogenous nitrogen requirement in bioremediation of diesel-contaminated soil
Abstract
The purpose of this study was to develop an effective bacterial consortium and determine their ability to overcome nitrogen limitation for the enhanced remediation of diesel-contaminated soils. Towards this, various bacterial consortia were constructed using oil-degrading and nitrogen-fixing microbes. The diesel removal efficiency of various developed consortia was evaluated by delivering the bacterial consortia to the diesel-contaminated soils. The consortium Acinetobacter sp. K-6 + Rhodococcus sp. Y2-2 + NH 4 NO 3 resulted in the highest removal (85.3%) of diesel from the contaminated soil. The consortium containing two different oil-degrading microbes (K-6 + Y2-2) and one nitrogen-fixing microbe Azotobacter vinelandii KCTC 2426 removed 83.1% of the diesel from the soil after 40 days of treatment. The total nitrogen content analysis revealed higher amounts of nitrogen in soil treated with the nitrogen-fixing microbe when compared with that of the soil supplemented with exogenous inorganic nitrogen. The findings in this present study reveal that the consortium containing the nitrogen-fixing microbe degraded similar amounts of diesel to that degraded by the consortium supplemented with exogenous inorganic nitrogen. This suggests that the developed consortium K-6 + Y2-2 + KCTC 2426 compensated for the nitrogen limitation and eliminated the need for exogenous nitrogen in bioremediation of diesel-contaminated soils.
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A consortium composed of Acinetobacter and Rhodococcus in combination with nitrogen-fixing Azotobacter vinelandii removed 83.1% of diesel contamination without requiring external nitrogen supplementation.
“A consortium composed of Acinetobacter and Rhodococcus in combination with nitrogen-fixing Azotobacter vinelandii removed 83.1% of diesel contamination without requiring external nitrogen supplementation.”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [60]
The approach of using a consortium with nitrogen-fixing Azotobacter vinelandii reduces dependency on chemical fertilizers.
“This approach reduces dependency on chemical fertilizers, making it a sustainable and cost-effective bioremediation strategy [60].”
From Harnessing bacterial consortia for effective bioremediation: targeted removal of heavy metals, hydrocarbons, and persistent pollutants (2025) · cites this paper as [60]
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Research works printed but not linked: 36
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Qattan, S. Y. A. (2025) · Environmental Sciences Europe · doi:10.1186/s12302-025-01103-y · Cited by 109
Metadata
- Authors
- Chaudhary, D. K., Bajagain, R., Jeong, S.-W., & Kim, J.
- Affiliations
- Kyonggi University (KR)
- Kunsan National University (KR)
- Corresponding author
- Kim, Jaisoo
- Venue
- World Journal of Microbiology and Biotechnology
- Published
- 2019-06-20
- Volume
- 35
- Issue
- 7
- Pages
- 99-99
- ISSN
- 0959-3993 (ISSN-L)
- 1573-0972
- OpenAlex
- W2952959166
- Cited by
- 46
- References
- 0
- Citations by year
- 2026: 4 · 2025: 10 · 2024: 3 · 2023: 8 · 2022: 5 · 2021: 9 · 2020: 4 · 2019: 2
- FWCI
- 1.50
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- World Journal of Microbiology and Biotechnology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Ministry of Education (2016R1D1A1A09916982)
- National Research Foundation (2018R1A2B6006139)
- Topics
- Physical Sciences › Environmental Science › Pollution › Microbial bioremediation and biosurfactants
- Physical Sciences › Chemistry › Organic Chemistry › Steroid Chemistry and Biochemistry
- Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
- Keywords
- bacterial consortium, oil-degrading bacteria, nitrogen-fixing bacteria, nitrogen fixation, nitrogen limitation, diesel-contaminated soil, bioremediation, Acinetobacter, Rhodococcus, Azotobacter vinelandii, diesel removal
- MeSH terms
- Nitrogen-Fixing Bacteria, Acinetobacter, Biodegradation, Environmental, Gasoline, Nitrogen, Rhodococcus, Soil, Soil Microbiology, Soil Pollutants, Azotobacter vinelandii
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