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Dohare S, Rawat HK, Bhargava Y, Kango N. Characterization of Diesel Degrading Indigenous Bacterial Strains, Acinetobacter pittii and Pseudomonas aeruginosa, Isolated from Oil Contaminated Soils. Indian J Microbiol 2024; 64:749-757. [PMID: 39011005 PMCID: PMC11246406 DOI: 10.1007/s12088-024-01317-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 05/20/2024] [Indexed: 07/17/2024] Open
Abstract
In this study, 13 diesel degrading bacteria were isolated from the oil contaminated soils and the promising strains identified as Acinetobacter pittii ED1 and Pseudomonas aeruginosa BN were evaluated for their diesel degrading capabilities. These strains degraded the diesel optimally at 30 °C, pH 7.0 and 1% diesel concentration. Both the strains produced biofilm at 1% diesel concentration indicating their ability to tolerate diesel induced abiotic stress. Gravimetric analysis of the spent medium after 7 days of incubation showed that A. pittii ED1 and P. aeruginosa BN degraded 68.61% and 76% diesel, respectively, while biodegradation reached more than 90% after 21 days. Fourier Transform Infrared (FTIR) analysis of the degraded diesel showed 1636.67 cm-1 (C=C stretch, N-H bond) peak corresponding to alkenes and primary amines, while GC-TOF-MS analysis showed decline in hydrocarbon intensities after 7 days of incubation. The present study revealed that newly isolated A. pittii ED1 and P. aeruginosa BN were able to degrade diesel hydrocarbons (C11-C18, and C19-C24) efficiently and have potential for bioremediation of the oil-contaminated sites. Supplementary Information The online version contains supplementary material available at 10.1007/s12088-024-01317-3.
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Affiliation(s)
- Sonam Dohare
- Department of Microbiology, Doctor Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP 470003 India
| | - Hemant Kumar Rawat
- Department of Microbiology, Doctor Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP 470003 India
| | - Yogesh Bhargava
- Department of Microbiology, Doctor Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP 470003 India
| | - Naveen Kango
- Department of Microbiology, Doctor Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP 470003 India
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Shi HP, Zhao YH, Zheng ML, Gong CY, Yan L, Liu Y, Luo YM, Liu ZP. Arsenic effectively improves the degradation of fluorene by Rhodococcus sp. 2021 under the combined pollution of arsenic and fluorene. CHEMOSPHERE 2024; 353:141635. [PMID: 38447897 DOI: 10.1016/j.chemosphere.2024.141635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 02/08/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024]
Abstract
The performance of bacterial strains in executing degradative functions under the coexistence of heavy metals/heavy metal-like elements and organic contaminants is understudied. In this study, we isolated a fluorene-degrading bacterium, highly arsenic-resistant, designated as strain 2021, from contaminated soil at the abandoned site of an old coking plant. It was identified as a member of the genus Rhodococcus sp. strain 2021 exhibited efficient fluorene-degrading ability under optimal conditions of 400 mg/L fluorene, 30 °C, pH 7.0, and 250 mg/L trivalent arsenic. It was noted that the addition of arsenic could promote the growth of strain 2021 and improve the degradation of fluorene - a phenomenon that has not been described yet. The results further indicated that strain 2021 can oxidize As3+ to As5+; here, approximately 13.1% of As3+ was converted to As5+ after aerobic cultivation for 8 days at 30 °C. The addition of arsenic could greatly up-regulate the expression of arsR/A/B/C/D and pcaG/H gene clusters involved in arsenic resistance and aromatic hydrocarbon degradation; it also aided in maintaining the continuously high expression of cstA that codes for carbon starvation protein and prmA/B that codes for monooxygenase. These results suggest that strain 2021 holds great potential for the bioremediation of environments contaminated by a combination of arsenic and polycyclic aromatic hydrocarbons. This study provides new insights into the interactions among microbes, as well as inorganic and organic pollutants.
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Affiliation(s)
- Hong-Peng Shi
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 101408, China
| | - Ying-Hao Zhao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 101408, China
| | - Mei-Lin Zheng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 101408, China
| | - Cheng-Yan Gong
- University of Chinese Academy of Sciences, Beijing 101408, China; Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
| | - Lei Yan
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ying Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yong-Ming Luo
- Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhi-Pei Liu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China.
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Wang H, Lv Y, Bao J, Chen Y, Zhu L. Petroleum-contaminated soil bioremediation and microbial community succession induced by application of co-pyrolysis biochar amendment: An investigation of performances and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2024; 466:133600. [PMID: 38316070 DOI: 10.1016/j.jhazmat.2024.133600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/01/2024] [Accepted: 01/21/2024] [Indexed: 02/07/2024]
Abstract
This study aimed to remediate petroleum-contaminated soil using co-pyrolysis biochar derived from rice husk and cellulose. Rice husk and cellulose were mixed in various weight ratios (0:1, 1:0, 1:1, 1:3 and 3:1) and pyrolyzed under 500 °C. These biochar variants were labeled as R0C1, R1C0, R1C1, R1C3 and R3C1, respectively. Notably, the specific surface area and carbon content of the co- pyrolysis biochar increased, potentially promoting the growth and colonization of soil microorganisms. On the 60th day, the microbial control group achieved a 46.69% removal of pollutants, while the addition of R0C1, R1C0, R1C3, R1C1 and R3C1 resulted in removals of 70.56%, 67.01%, 67.62%, 68.74% and 67.30%, respectively. In contrast, the highest efficiency observed in the abiotic treatment group was only 24.12%. This suggested that the removal of petroleum pollutants was an outcome of the collaborative influence of co-pyrolysis biochar and soil microorganisms. Furthermore, the abundance of Proteobacteria, renowned for its petroleum degradation capability, obviously increased in the treatment group with the addition of co-pyrolysis biochar. This demonstrated that co-pyrolysis biochar could notably stimulate the growth of functionally associated microorganisms. This research confirmed the promising application of co-pyrolysis biochar in the remediation of petroleum-contaminated soil.
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Affiliation(s)
- Hanzhi Wang
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China
| | - Yuanfei Lv
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China
| | - Jianfeng Bao
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China
| | - Yiyun Chen
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China.
| | - Liandong Zhu
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, PR China; State Key Laboratory of Water Resources Engineering and Management, Wuhan University, Wuhan 430079, PR China.
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Thirumurugan D, Kokila D, Balaji T, Rajamohan R, AlSalhi MS, Devanesan S, Rajasekar A, Parthipan P. Impact of biosurfactant produced by Bacillus spp. on biodegradation efficiency of crude oil and anthracene. CHEMOSPHERE 2023; 344:140340. [PMID: 37778647 DOI: 10.1016/j.chemosphere.2023.140340] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/17/2023] [Accepted: 09/28/2023] [Indexed: 10/03/2023]
Abstract
Biosurfactants are surface active molecules generated by various microorganisms, including bacteria, actinobacteria, algae, and fungi. In this study, bacterial strains are isolated from soil contaminated with used motor oil and examined for potential biosurfactant production. A minimum salt medium (MSM), with crude oil as the only carbon source, is used to isolate potential biosurfactant-producing bacterial strains. About 23 strains are isolated, and all are subjected to the primary screening methods for biosurfactant production. Based on the emulsification index, oil displacement, and drop collapse screening methods, two isolates with potential biosurfactant-producing ability are selected for further studies. The synthesis of biosurfactants, crude oil and anthracene biodegradation is carried out with strains DTS1 and DTS2. Both strains show significant outcomes in crude oil degradation. In addition, both strains can utilize anthracene as the sole carbon source. During the degradation course, changes in the growth conditions are continuously monitored by measuring turbidity and pH. In this degradation study, the biosurfactant production aptitude of the isolated strains plays an essential role in increasing the bioavailability of hydrophobic hydrocarbons. These strains are identified down to the molecular level by employing 16S rRNA gene sequencing, and the acquired sequences are submitted to get the accession numbers. These prospective strains can be utilized to remediate hydrocarbon-contaminated environments.
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Affiliation(s)
- Durairaj Thirumurugan
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu, 603203, India
| | - Dhayalakrishnan Kokila
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu, 603203, India
| | - Thirupathi Balaji
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu, 603203, India
| | - Rajaram Rajamohan
- Organic Material Synthesis Laboratory, School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, Republic of Korea.
| | - Mohamad S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455; Riyadh, 11451, Saudi Arabia
| | - Sandhanasamy Devanesan
- Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455; Riyadh, 11451, Saudi Arabia
| | - Aruliah Rajasekar
- Environmental Molecular Microbiology Research Laboratory, Department of Biotechnology,Thiruvalluvar University, Serkkadu, Vellore, 632115, Tamil Nadu, India
| | - Punniyakotti Parthipan
- Department of Biotechnology, Faculty of Science and Humanities, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu, 603203, India.
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Tripathi V, Gaur VK, Thakur RS, Patel DK, Manickam N. Assessing the half-life and degradation kinetics of aliphatic and aromatic hydrocarbons by bacteria isolated from crude oil contaminated soil. CHEMOSPHERE 2023:139264. [PMID: 37348617 DOI: 10.1016/j.chemosphere.2023.139264] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 05/22/2023] [Accepted: 06/16/2023] [Indexed: 06/24/2023]
Abstract
Pollution from the oil industries and refineries has worsened various environmental compartments. In this study, indigenous oil degrading bacteria were isolated from crude oil obtained from an Oil and Natural Gas Corporation (ONGC) asset in Ankleshwar, Gujarat, India. Based on 16S rRNA phylogeny, they were identified as Pseudomonas boreopolis IITR108, Microbacterium schleiferi IITR109, Pseudomonas aeruginosa IITR110, and Bacillus velezensis IITR111. The strain IITR108, IITR109, IITR110, and IITR111 showed 80-89% and 71-78% degradation of aliphatic (C8-C40) and aromatic (4-5 ring) hydrocarbons respectively in 45 d when supplemented with 3% (v/v) waste crude oil. When compared to individual bacteria, the consortium degrades 93.2% of aliphatic hydrocarbons and 85.5% of polyaromatic hydrocarbons. It was observed that the total aliphatic and aromatic content of crude oil 394,470 μg/mL and 47,050 μg/mL was reduced up to 9617.75 μg/mL and 4586 μg/mL respectively in 45 d when consortium was employed. The rate kinetics analysis revealed that the biodegradation isotherm followed first order kinetics, with a linear correlation between concentration (hydrocarbons) and time intervals. The half-life of aliphatic (C8-C40) and aromatic hydrocarbons ranged from 200 to 453 h and 459-714 h respectively. All the bacteria efficiently produced catabolic enzymes such as alkane monooxygenase, alcohol dehydrogenase, and lipase during the degradation of crude oil. These findings indicated that the bacterial consortium can be a better candidate for bioremediation and reclamation of aliphatic and aromatics hydrocarbon contaminated sites.
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Affiliation(s)
- Varsha Tripathi
- Environmental Biotechnology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vivek K Gaur
- Environmental Biotechnology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Presently: School of Energy and Chemical Engineering, UNIST, Ulsan, 44919, Republic of Korea
| | - Ravindra S Thakur
- Analytical Chemistry Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Devendra K Patel
- Analytical Chemistry Laboratory, Regulatory Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India
| | - Natesan Manickam
- Environmental Biotechnology Laboratory, Environmental Toxicology Group, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India.
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Wu B, Xiu J, Yu L, Huang L, Yi L, Ma Y. Degradation of crude oil in a co-culture system of Bacillus subtilis and Pseudomonas aeruginosa. Front Microbiol 2023; 14:1132831. [PMID: 37250029 PMCID: PMC10213283 DOI: 10.3389/fmicb.2023.1132831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 04/21/2023] [Indexed: 05/31/2023] Open
Abstract
Microbial remediation has been regarded as one of the most promising decontamination techniques for crude oil pollution. However, there are few studies on the interaction of bacteria in the microbial community during bioremediation. The aim of this work was to research the promotion of defined co-culture of Bacillus subtilis SL and Pseudomonas aeruginosa WJ-1 for biodegradation of crude oil. After 7 days of incubation, the analysis of residual oil, saturated and aromatic fraction in the samples showed that the degradation efficiency of them was significantly improved. The degradation efficiency of crude oil was enhanced from 32.61% and 54.35% in individual culture to 63.05% by the defined co-culture of strains SL and WJ-1. Furthermore, it was found that the defined co-culture system represented relatively excellent performance in bacterial growth, cell surface hydrophobicity (CSH) and emulsification activity. These results indicated that the combination of Bacillus subtilis and Pseudomonas aeruginosa can effectively promote the degradation and utilization of crude oil, which may provide a new idea for the improvement of bioremediation strategies. GRAPHICAL ABSTRACT.
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Affiliation(s)
- Bo Wu
- School of Engineering Science, University of Chinese Academy of Sciences, Beijing, China
- Institute of Porous Flow and Fluid Mechanics, University of Chinese Academy of Sciences, Beijing, China
- State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
| | - Jianlong Xiu
- PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
| | - Li Yu
- PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
| | - Lixin Huang
- PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
| | - Lina Yi
- PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
| | - Yuandong Ma
- PetroChina Research Institute of Petroleum Exploration and Development, Beijing, China
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Lv Y, Bao J, Liu D, Gao X, Yu Y, Zhu L. Synergistic effects of rice husk biochar and aerobic composting for heavy oil-contaminated soil remediation and microbial community succession evaluation. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130929. [PMID: 36860035 DOI: 10.1016/j.jhazmat.2023.130929] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/18/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Soil petroleum pollution is an urgent problem in modern society, which seriously threatens the ecological balance and environmental safety. Aerobic composting technology is considered economically acceptable and technologically feasible for the soil remediation. In this study, the combined experiment of aerobic composting with the addition of biochar materials was conducted for the remediation of heavy oil-contaminated soil, and treatments with 0, 5, 10 and 15 wt% biochar dosages were labeled as CK, C5, C10 and C15, respectively. Conventional parameters (temperature, pH, NH4+-N and NO3--N) and enzyme activities (urease, cellulase, dehydrogenase and polyphenol oxidase) during the composting process were systematically investigated. Remediation performance and functional microbial community abundance were also characterized. According to experimental consequences, removal efficiencies of CK, C5, C10 and C15 were 48.0%, 68.1%, 72.0% and 73.9%, respectively. The comparison with abiotic treatments corroborated that biostimulation rather than adsorption effect was the main removal mechanism during the biochar-assisted composting process. Noteworthy, the biochar addition regulated the succession process of microbial community and increased the abundance of microorganisms related to petroleum degradation at the genus level. This work demonstrated that aerobic composting with biochar amendment would be a fascinating technology for petroleum-contaminated soil remediation.
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Affiliation(s)
- Yuanfei Lv
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China
| | - Jianfeng Bao
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China
| | - Dongyang Liu
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China
| | - Xinxin Gao
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China
| | - Yunjiang Yu
- State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China
| | - Liandong Zhu
- School of Resources & Environmental Science, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Hubei Key Laboratory of Biomass-Resources Chemistry and Environmental Biotechnology, Wuhan University, Wuhan 430079, China; State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China.
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Sun S, Wang Y, Xu C, Qiao C, Chen S, Zhao C, Liu Q, Zhang X. Reconstruction of microbiome and functionality accelerated crude oil biodegradation of 2,4-DCP-oil-contaminated soil systems using composite microbial agent B-Cl. JOURNAL OF HAZARDOUS MATERIALS 2023; 447:130808. [PMID: 36669400 DOI: 10.1016/j.jhazmat.2023.130808] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/02/2023] [Accepted: 01/15/2023] [Indexed: 06/17/2023]
Abstract
Biodegradation is one of the safest and most economical methods for the elimination of toxic chlorophenols and crude oil from the environment. In this study, aerobic degradation of the aforementioned compounds by composite microbial agent B-Cl, which consisted of Bacillus B1 and B2 in a 3:2 ratio, was analyzed. The biodegradation mechanism of B-Cl was assessed based on whole genome sequencing, Fourier transform infrared spectroscopy and gas chromatographic analyses. B-Cl was most effective at reducing Cl- concentrations (65.17%) and crude oil biodegradation (59.18%) at 7 d, which was when the content of alkanes ≤ C30 showed the greatest decrease. Furthermore, adding B-Cl solution to soil significantly decreased the 2,4-DCP and oil content to below the detection limit and by 80.68%, respectively, and reconstructed of the soil microbial into a system containing more CPs-degrading (exaA, frmA, L-2-HAD, dehH, ALDH, catABE), aromatic compounds-degrading (pcaGH, catAE, benA-xylX, paaHF) and alkane- and fatty acid-degrading (alkB, atoB, fadANJ) microorganisms. Moreover, the presence of 2,4-DCP was the main hinder of the observed effects. This study demonstrates the importance of adding B-Cl solution to determine the interplay of CPs with microbes and accelerating oil degradation, which can be used for in-situ bioremediation of CPs and oil-contaminated soil.
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Affiliation(s)
- Shuo Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
| | - Yaru Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
| | - Chenfei Xu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
| | - Chenlu Qiao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
| | - Shuiquan Chen
- College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
| | - Qiyou Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China.
| | - Xiuxia Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China; State Key Laboratory of Petroleum Pollution Control, Qingdao 266580, PR China
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Goveas LC, Selvaraj R, Sajankila SP. Characterization of biosurfactant produced in response to petroleum crude oil stress by Bacillus sp. WD22 in marine environment. Braz J Microbiol 2022; 53:2015-2025. [PMID: 36053434 PMCID: PMC9679063 DOI: 10.1007/s42770-022-00811-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 07/25/2022] [Indexed: 01/13/2023] Open
Abstract
Bacillus sp. WD22, previously isolated from refinery effluent, degraded 71% of C8 hydrocarbons present in 1.0% v/v PCO in seawater (control medium), which reduced to 16.3%, on addition of yeast extract. The bacteria produced a biosurfactant in both media, whose surface was observed to be amorphous in nature under FESEM-EDAX analysis. The biosurfactant was characterized as a linear surfactin by LCMS and FT-IR analysis. The critical micelle concentration was observed as 50 mg/L and 60 mg/L at which the surface tension of water was reduced to 30 mN/m. Purified biosurfactant could emulsify petroleum-based oils and vegetable oils effectively and was stable at all tested conditions of pH, salinity and temperature up to 80 °C. The biosurfactant production was found to be mixed growth associated in control medium, while it was strictly growth associated in medium with yeast extract as studied by the Leudeking-Piret model.
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Affiliation(s)
- Louella Concepta Goveas
- Department of Biotechnology Engineering, NMAM Institute of Technology-Affiliated to NITTE (Deemed to Be University), Nitte, Karnataka, 574110, India.
| | - Raja Selvaraj
- Department of Chemical Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Karnataka, 576104, India
| | - Shyama Prasad Sajankila
- Department of Biotechnology Engineering, NMAM Institute of Technology-Affiliated to NITTE (Deemed to Be University), Nitte, Karnataka, 574110, India
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