Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach
For microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied the direct impacts of the properties of microorganisms on the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Colloids and Interfaces |
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| Online Access: | https://www.mdpi.com/2504-5377/5/4/49 |
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| author | Ehsan Ganji-Azad Aliyar Javadi Moein Jahanbani Veshareh Shahab Ayatollahi Reinhard Miller |
| author_facet | Ehsan Ganji-Azad Aliyar Javadi Moein Jahanbani Veshareh Shahab Ayatollahi Reinhard Miller |
| author_sort | Ehsan Ganji-Azad |
| collection | DOAJ |
| description | For microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied the direct impacts of the properties of microorganisms on the related mechanisms. However, there are only very few papers dealing with the direct impacts of microorganisms on interfacial properties. In the present work, the interfacial properties of three bacteria <i>MJ02</i> (Bacillus Subtilis type), <i>MJ03</i> (Pseudomonas Aeruginosa type), and <i>RAG1</i> (Acinetobacter Calcoaceticus type) with the hydrophobicity factors 2, 34, and 79% were studied, along with their direct impact on the water/heptane interfacial tension (IFT), dilational interfacial visco-elasticity, and emulsion stability. A relationship between the adsorption dynamics and IFT reduction with the hydrophobicity of the bacteria cells is found. The cells with highest hydrophobicity (79%) exhibit a very fast dynamic of adsorption and lead to relatively large interfacial elasticity values at short adsorption time. The maximum elasticity values (at the studied frequencies) are observed for bacteria cells with the intermediate hydrophobicity factor (34%); however, at longer adsorption times. The emulsification studies show that among the three bacteria, just <i>RAG1</i> provides a good capability to stabilize crude oil in brine emulsions, which correlates with the observed fast dynamics of adsorption and high elasticity values at short times. The salinity of the aqueous phase is also discussed as an important factor for the emulsion formation and stabilization. |
| first_indexed | 2024-03-10T04:22:55Z |
| format | Article |
| id | doaj.art-7c9351d349b648f0a4547365a938ece7 |
| institution | Directory Open Access Journal |
| issn | 2504-5377 |
| language | English |
| last_indexed | 2024-03-10T04:22:55Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Colloids and Interfaces |
| spelling | doaj.art-7c9351d349b648f0a4547365a938ece72023-11-23T07:46:12ZengMDPI AGColloids and Interfaces2504-53772021-11-01544910.3390/colloids5040049Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR ApproachEhsan Ganji-Azad0Aliyar Javadi1Moein Jahanbani Veshareh2Shahab Ayatollahi3Reinhard Miller4Chemical Engineering Department, College of Engineering, University of Tehran, Tehran 11155-4563, IranChemical Engineering Department, College of Engineering, University of Tehran, Tehran 11155-4563, IranDanish Hydrocarbon Research and Technology Center, Denmark Technical University, 2800 Kongens Lyngby, DenmarkSchool of Chemical & Petroleum Engineering, Sharif University of Technology, Tehran 11155-1639, IranPhysics Department, Technical University Darmstadt, 64289 Darmstadt, GermanyFor microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied the direct impacts of the properties of microorganisms on the related mechanisms. However, there are only very few papers dealing with the direct impacts of microorganisms on interfacial properties. In the present work, the interfacial properties of three bacteria <i>MJ02</i> (Bacillus Subtilis type), <i>MJ03</i> (Pseudomonas Aeruginosa type), and <i>RAG1</i> (Acinetobacter Calcoaceticus type) with the hydrophobicity factors 2, 34, and 79% were studied, along with their direct impact on the water/heptane interfacial tension (IFT), dilational interfacial visco-elasticity, and emulsion stability. A relationship between the adsorption dynamics and IFT reduction with the hydrophobicity of the bacteria cells is found. The cells with highest hydrophobicity (79%) exhibit a very fast dynamic of adsorption and lead to relatively large interfacial elasticity values at short adsorption time. The maximum elasticity values (at the studied frequencies) are observed for bacteria cells with the intermediate hydrophobicity factor (34%); however, at longer adsorption times. The emulsification studies show that among the three bacteria, just <i>RAG1</i> provides a good capability to stabilize crude oil in brine emulsions, which correlates with the observed fast dynamics of adsorption and high elasticity values at short times. The salinity of the aqueous phase is also discussed as an important factor for the emulsion formation and stabilization.https://www.mdpi.com/2504-5377/5/4/49microbial enhanced oil recovery (MEOR)hydrophobicity of bacteria cellsinterfacial propertiesdilational visco-elasticityemulsion stabilitysalinity effects |
| spellingShingle | Ehsan Ganji-Azad Aliyar Javadi Moein Jahanbani Veshareh Shahab Ayatollahi Reinhard Miller Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach Colloids and Interfaces microbial enhanced oil recovery (MEOR) hydrophobicity of bacteria cells interfacial properties dilational visco-elasticity emulsion stability salinity effects |
| title | Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach |
| title_full | Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach |
| title_fullStr | Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach |
| title_full_unstemmed | Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach |
| title_short | Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach |
| title_sort | bacteria cell hydrophobicity and interfacial properties relationships a new meor approach |
| topic | microbial enhanced oil recovery (MEOR) hydrophobicity of bacteria cells interfacial properties dilational visco-elasticity emulsion stability salinity effects |
| url | https://www.mdpi.com/2504-5377/5/4/49 |
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