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Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach

Ganji-Azad, Ehsan ; Javadi, Aliyar ; Jahanbani Veshareh, Moein ; Ayatollahi, Shahab ; Miller, Reinhard (2022):
Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach. (Publisher's Version)
In: Colloids and Interfaces, 5 (4), MDPI, e-ISSN 2504-5377,
DOI: 10.26083/tuprints-00020075,
[Article]

Abstract

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 MJ02 (Bacillus Subtilis type), MJ03 (Pseudomonas Aeruginosa type), and RAG1 (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 RAG1 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.

Item Type: Article
Erschienen: 2022
Creators: Ganji-Azad, Ehsan ; Javadi, Aliyar ; Jahanbani Veshareh, Moein ; Ayatollahi, Shahab ; Miller, Reinhard
Origin: Secondary publication DeepGreen
Status: Publisher's Version
Title: Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach
Language: English
Abstract:

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 MJ02 (Bacillus Subtilis type), MJ03 (Pseudomonas Aeruginosa type), and RAG1 (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 RAG1 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.

Journal or Publication Title: Colloids and Interfaces
Volume of the journal: 5
Issue Number: 4
Publisher: MDPI
Collation: 14 Seiten
Uncontrolled Keywords: microbial enhanced oil recovery (MEOR), hydrophobicity of bacteria cells, interfacial properties, dilational visco-elasticity, emulsion stability, salinity effects, diffusion and adsorption
Divisions: 05 Department of Physics
05 Department of Physics > Institute for Condensed Matter Physics
05 Department of Physics > Institute for Condensed Matter Physics > Biophysics
Date Deposited: 29 Apr 2022 09:02
DOI: 10.26083/tuprints-00020075
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20075
URN: urn:nbn:de:tuda-tuprints-200751
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